| /* Plugin for AMD GCN execution. |
| |
| Copyright (C) 2013-2021 Free Software Foundation, Inc. |
| |
| Contributed by Mentor Embedded |
| |
| This file is part of the GNU Offloading and Multi Processing Library |
| (libgomp). |
| |
| Libgomp is free software; you can redistribute it and/or modify it |
| under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3, or (at your option) |
| any later version. |
| |
| Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
| FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| more details. |
| |
| Under Section 7 of GPL version 3, you are granted additional |
| permissions described in the GCC Runtime Library Exception, version |
| 3.1, as published by the Free Software Foundation. |
| |
| You should have received a copy of the GNU General Public License and |
| a copy of the GCC Runtime Library Exception along with this program; |
| see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| /* {{{ Includes and defines */ |
| |
| #include "config.h" |
| #include "symcat.h" |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <pthread.h> |
| #include <inttypes.h> |
| #include <stdbool.h> |
| #include <limits.h> |
| #include <hsa.h> |
| #include <hsa_ext_amd.h> |
| #include <dlfcn.h> |
| #include <signal.h> |
| #include "libgomp-plugin.h" |
| #include "gomp-constants.h" |
| #include <elf.h> |
| #include "oacc-plugin.h" |
| #include "oacc-int.h" |
| #include <assert.h> |
| |
| /* These probably won't be in elf.h for a while. */ |
| #ifndef R_AMDGPU_NONE |
| #define R_AMDGPU_NONE 0 |
| #define R_AMDGPU_ABS32_LO 1 /* (S + A) & 0xFFFFFFFF */ |
| #define R_AMDGPU_ABS32_HI 2 /* (S + A) >> 32 */ |
| #define R_AMDGPU_ABS64 3 /* S + A */ |
| #define R_AMDGPU_REL32 4 /* S + A - P */ |
| #define R_AMDGPU_REL64 5 /* S + A - P */ |
| #define R_AMDGPU_ABS32 6 /* S + A */ |
| #define R_AMDGPU_GOTPCREL 7 /* G + GOT + A - P */ |
| #define R_AMDGPU_GOTPCREL32_LO 8 /* (G + GOT + A - P) & 0xFFFFFFFF */ |
| #define R_AMDGPU_GOTPCREL32_HI 9 /* (G + GOT + A - P) >> 32 */ |
| #define R_AMDGPU_REL32_LO 10 /* (S + A - P) & 0xFFFFFFFF */ |
| #define R_AMDGPU_REL32_HI 11 /* (S + A - P) >> 32 */ |
| #define R_AMDGPU_RELATIVE64 13 /* B + A */ |
| #endif |
| |
| /* GCN specific definitions for asynchronous queues. */ |
| |
| #define ASYNC_QUEUE_SIZE 64 |
| #define DRAIN_QUEUE_SYNCHRONOUS_P false |
| #define DEBUG_QUEUES 0 |
| #define DEBUG_THREAD_SLEEP 0 |
| #define DEBUG_THREAD_SIGNAL 0 |
| |
| /* Defaults. */ |
| #define DEFAULT_GCN_HEAP_SIZE (100*1024*1024) /* 100MB. */ |
| |
| /* Secure getenv() which returns NULL if running as SUID/SGID. */ |
| #ifndef HAVE_SECURE_GETENV |
| #ifdef HAVE___SECURE_GETENV |
| #define secure_getenv __secure_getenv |
| #elif defined (HAVE_UNISTD_H) && defined(HAVE_GETUID) && defined(HAVE_GETEUID) \ |
| && defined(HAVE_GETGID) && defined(HAVE_GETEGID) |
| |
| #include <unistd.h> |
| |
| /* Implementation of secure_getenv() for targets where it is not provided but |
| we have at least means to test real and effective IDs. */ |
| |
| static char * |
| secure_getenv (const char *name) |
| { |
| if ((getuid () == geteuid ()) && (getgid () == getegid ())) |
| return getenv (name); |
| else |
| return NULL; |
| } |
| |
| #else |
| #define secure_getenv getenv |
| #endif |
| #endif |
| |
| /* }}} */ |
| /* {{{ Types */ |
| |
| /* GCN-specific implementation of the GOMP_PLUGIN_acc_thread data. */ |
| |
| struct gcn_thread |
| { |
| /* The thread number from the async clause, or GOMP_ASYNC_SYNC. */ |
| int async; |
| }; |
| |
| /* As an HSA runtime is dlopened, following structure defines function |
| pointers utilized by the HSA plug-in. */ |
| |
| struct hsa_runtime_fn_info |
| { |
| /* HSA runtime. */ |
| hsa_status_t (*hsa_status_string_fn) (hsa_status_t status, |
| const char **status_string); |
| hsa_status_t (*hsa_system_get_info_fn) (hsa_system_info_t attribute, |
| void *value); |
| hsa_status_t (*hsa_agent_get_info_fn) (hsa_agent_t agent, |
| hsa_agent_info_t attribute, |
| void *value); |
| hsa_status_t (*hsa_isa_get_info_fn)(hsa_isa_t isa, |
| hsa_isa_info_t attribute, |
| uint32_t index, |
| void *value); |
| hsa_status_t (*hsa_init_fn) (void); |
| hsa_status_t (*hsa_iterate_agents_fn) |
| (hsa_status_t (*callback)(hsa_agent_t agent, void *data), void *data); |
| hsa_status_t (*hsa_region_get_info_fn) (hsa_region_t region, |
| hsa_region_info_t attribute, |
| void *value); |
| hsa_status_t (*hsa_queue_create_fn) |
| (hsa_agent_t agent, uint32_t size, hsa_queue_type_t type, |
| void (*callback)(hsa_status_t status, hsa_queue_t *source, void *data), |
| void *data, uint32_t private_segment_size, |
| uint32_t group_segment_size, hsa_queue_t **queue); |
| hsa_status_t (*hsa_agent_iterate_regions_fn) |
| (hsa_agent_t agent, |
| hsa_status_t (*callback)(hsa_region_t region, void *data), void *data); |
| hsa_status_t (*hsa_executable_destroy_fn) (hsa_executable_t executable); |
| hsa_status_t (*hsa_executable_create_fn) |
| (hsa_profile_t profile, hsa_executable_state_t executable_state, |
| const char *options, hsa_executable_t *executable); |
| hsa_status_t (*hsa_executable_global_variable_define_fn) |
| (hsa_executable_t executable, const char *variable_name, void *address); |
| hsa_status_t (*hsa_executable_load_code_object_fn) |
| (hsa_executable_t executable, hsa_agent_t agent, |
| hsa_code_object_t code_object, const char *options); |
| hsa_status_t (*hsa_executable_freeze_fn)(hsa_executable_t executable, |
| const char *options); |
| hsa_status_t (*hsa_signal_create_fn) (hsa_signal_value_t initial_value, |
| uint32_t num_consumers, |
| const hsa_agent_t *consumers, |
| hsa_signal_t *signal); |
| hsa_status_t (*hsa_memory_allocate_fn) (hsa_region_t region, size_t size, |
| void **ptr); |
| hsa_status_t (*hsa_memory_assign_agent_fn) (void *ptr, hsa_agent_t agent, |
| hsa_access_permission_t access); |
| hsa_status_t (*hsa_memory_copy_fn)(void *dst, const void *src, size_t size); |
| hsa_status_t (*hsa_memory_free_fn) (void *ptr); |
| hsa_status_t (*hsa_signal_destroy_fn) (hsa_signal_t signal); |
| hsa_status_t (*hsa_executable_get_symbol_fn) |
| (hsa_executable_t executable, const char *module_name, |
| const char *symbol_name, hsa_agent_t agent, int32_t call_convention, |
| hsa_executable_symbol_t *symbol); |
| hsa_status_t (*hsa_executable_symbol_get_info_fn) |
| (hsa_executable_symbol_t executable_symbol, |
| hsa_executable_symbol_info_t attribute, void *value); |
| hsa_status_t (*hsa_executable_iterate_symbols_fn) |
| (hsa_executable_t executable, |
| hsa_status_t (*callback)(hsa_executable_t executable, |
| hsa_executable_symbol_t symbol, void *data), |
| void *data); |
| uint64_t (*hsa_queue_add_write_index_release_fn) (const hsa_queue_t *queue, |
| uint64_t value); |
| uint64_t (*hsa_queue_load_read_index_acquire_fn) (const hsa_queue_t *queue); |
| void (*hsa_signal_store_relaxed_fn) (hsa_signal_t signal, |
| hsa_signal_value_t value); |
| void (*hsa_signal_store_release_fn) (hsa_signal_t signal, |
| hsa_signal_value_t value); |
| hsa_signal_value_t (*hsa_signal_wait_acquire_fn) |
| (hsa_signal_t signal, hsa_signal_condition_t condition, |
| hsa_signal_value_t compare_value, uint64_t timeout_hint, |
| hsa_wait_state_t wait_state_hint); |
| hsa_signal_value_t (*hsa_signal_load_acquire_fn) (hsa_signal_t signal); |
| hsa_status_t (*hsa_queue_destroy_fn) (hsa_queue_t *queue); |
| |
| hsa_status_t (*hsa_code_object_deserialize_fn) |
| (void *serialized_code_object, size_t serialized_code_object_size, |
| const char *options, hsa_code_object_t *code_object); |
| }; |
| |
| /* Structure describing the run-time and grid properties of an HSA kernel |
| lauch. This needs to match the format passed to GOMP_OFFLOAD_run. */ |
| |
| struct GOMP_kernel_launch_attributes |
| { |
| /* Number of dimensions the workload has. Maximum number is 3. */ |
| uint32_t ndim; |
| /* Size of the grid in the three respective dimensions. */ |
| uint32_t gdims[3]; |
| /* Size of work-groups in the respective dimensions. */ |
| uint32_t wdims[3]; |
| }; |
| |
| /* Collection of information needed for a dispatch of a kernel from a |
| kernel. */ |
| |
| struct kernel_dispatch |
| { |
| struct agent_info *agent; |
| /* Pointer to a command queue associated with a kernel dispatch agent. */ |
| void *queue; |
| /* Pointer to a memory space used for kernel arguments passing. */ |
| void *kernarg_address; |
| /* Kernel object. */ |
| uint64_t object; |
| /* Synchronization signal used for dispatch synchronization. */ |
| uint64_t signal; |
| /* Private segment size. */ |
| uint32_t private_segment_size; |
| /* Group segment size. */ |
| uint32_t group_segment_size; |
| }; |
| |
| /* Structure of the kernargs segment, supporting console output. |
| |
| This needs to match the definitions in Newlib, and the expectations |
| in libgomp target code. */ |
| |
| struct kernargs { |
| /* Leave space for the real kernel arguments. |
| OpenACC and OpenMP only use one pointer. */ |
| int64_t dummy1; |
| int64_t dummy2; |
| |
| /* A pointer to struct output, below, for console output data. */ |
| int64_t out_ptr; |
| |
| /* A pointer to struct heap, below. */ |
| int64_t heap_ptr; |
| |
| /* A pointer to an ephemeral memory arena. |
| Only needed for OpenMP. */ |
| int64_t arena_ptr; |
| |
| /* Output data. */ |
| struct output { |
| int return_value; |
| unsigned int next_output; |
| struct printf_data { |
| int written; |
| char msg[128]; |
| int type; |
| union { |
| int64_t ivalue; |
| double dvalue; |
| char text[128]; |
| }; |
| } queue[1024]; |
| unsigned int consumed; |
| } output_data; |
| }; |
| |
| /* A queue entry for a future asynchronous launch. */ |
| |
| struct kernel_launch |
| { |
| struct kernel_info *kernel; |
| void *vars; |
| struct GOMP_kernel_launch_attributes kla; |
| }; |
| |
| /* A queue entry for a future callback. */ |
| |
| struct callback |
| { |
| void (*fn)(void *); |
| void *data; |
| }; |
| |
| /* A data struct for the copy_data callback. */ |
| |
| struct copy_data |
| { |
| void *dst; |
| const void *src; |
| size_t len; |
| struct goacc_asyncqueue *aq; |
| }; |
| |
| /* A queue entry for a placeholder. These correspond to a wait event. */ |
| |
| struct placeholder |
| { |
| int executed; |
| pthread_cond_t cond; |
| pthread_mutex_t mutex; |
| }; |
| |
| /* A queue entry for a wait directive. */ |
| |
| struct asyncwait_info |
| { |
| struct placeholder *placeholderp; |
| }; |
| |
| /* Encode the type of an entry in an async queue. */ |
| |
| enum entry_type |
| { |
| KERNEL_LAUNCH, |
| CALLBACK, |
| ASYNC_WAIT, |
| ASYNC_PLACEHOLDER |
| }; |
| |
| /* An entry in an async queue. */ |
| |
| struct queue_entry |
| { |
| enum entry_type type; |
| union { |
| struct kernel_launch launch; |
| struct callback callback; |
| struct asyncwait_info asyncwait; |
| struct placeholder placeholder; |
| } u; |
| }; |
| |
| /* An async queue header. |
| |
| OpenMP may create one of these. |
| OpenACC may create many. */ |
| |
| struct goacc_asyncqueue |
| { |
| struct agent_info *agent; |
| hsa_queue_t *hsa_queue; |
| |
| pthread_t thread_drain_queue; |
| pthread_mutex_t mutex; |
| pthread_cond_t queue_cond_in; |
| pthread_cond_t queue_cond_out; |
| struct queue_entry queue[ASYNC_QUEUE_SIZE]; |
| int queue_first; |
| int queue_n; |
| int drain_queue_stop; |
| |
| int id; |
| struct goacc_asyncqueue *prev; |
| struct goacc_asyncqueue *next; |
| }; |
| |
| /* Mkoffload uses this structure to describe a kernel. |
| |
| OpenMP kernel dimensions are passed at runtime. |
| OpenACC kernel dimensions are passed at compile time, here. */ |
| |
| struct hsa_kernel_description |
| { |
| const char *name; |
| int oacc_dims[3]; /* Only present for GCN kernels. */ |
| int sgpr_count; |
| int vpgr_count; |
| }; |
| |
| /* Mkoffload uses this structure to describe an offload variable. */ |
| |
| struct global_var_info |
| { |
| const char *name; |
| void *address; |
| }; |
| |
| /* Mkoffload uses this structure to describe all the kernels in a |
| loadable module. These are passed the libgomp via static constructors. */ |
| |
| struct gcn_image_desc |
| { |
| struct gcn_image { |
| size_t size; |
| void *image; |
| } *gcn_image; |
| const unsigned kernel_count; |
| struct hsa_kernel_description *kernel_infos; |
| const unsigned global_variable_count; |
| struct global_var_info *global_variables; |
| }; |
| |
| /* This enum mirrors the corresponding LLVM enum's values for all ISAs that we |
| support. |
| See https://llvm.org/docs/AMDGPUUsage.html#amdgpu-ef-amdgpu-mach-table */ |
| |
| typedef enum { |
| EF_AMDGPU_MACH_AMDGCN_GFX803 = 0x02a, |
| EF_AMDGPU_MACH_AMDGCN_GFX900 = 0x02c, |
| EF_AMDGPU_MACH_AMDGCN_GFX906 = 0x02f, |
| EF_AMDGPU_MACH_AMDGCN_GFX908 = 0x030 |
| } EF_AMDGPU_MACH; |
| |
| const static int EF_AMDGPU_MACH_MASK = 0x000000ff; |
| typedef EF_AMDGPU_MACH gcn_isa; |
| |
| /* Description of an HSA GPU agent (device) and the program associated with |
| it. */ |
| |
| struct agent_info |
| { |
| /* The HSA ID of the agent. Assigned when hsa_context is initialized. */ |
| hsa_agent_t id; |
| /* The user-visible device number. */ |
| int device_id; |
| /* Whether the agent has been initialized. The fields below are usable only |
| if it has been. */ |
| bool initialized; |
| |
| /* The instruction set architecture of the device. */ |
| gcn_isa device_isa; |
| /* Name of the agent. */ |
| char name[64]; |
| /* Name of the vendor of the agent. */ |
| char vendor_name[64]; |
| /* Command queues of the agent. */ |
| hsa_queue_t *sync_queue; |
| struct goacc_asyncqueue *async_queues, *omp_async_queue; |
| pthread_mutex_t async_queues_mutex; |
| |
| /* The HSA memory region from which to allocate kernel arguments. */ |
| hsa_region_t kernarg_region; |
| |
| /* The HSA memory region from which to allocate device data. */ |
| hsa_region_t data_region; |
| |
| /* Allocated team arenas. */ |
| struct team_arena_list *team_arena_list; |
| pthread_mutex_t team_arena_write_lock; |
| |
| /* Read-write lock that protects kernels which are running or about to be run |
| from interference with loading and unloading of images. Needs to be |
| locked for reading while a kernel is being run, and for writing if the |
| list of modules is manipulated (and thus the HSA program invalidated). */ |
| pthread_rwlock_t module_rwlock; |
| |
| /* The module associated with this kernel. */ |
| struct module_info *module; |
| |
| /* Mutex enforcing that only one thread will finalize the HSA program. A |
| thread should have locked agent->module_rwlock for reading before |
| acquiring it. */ |
| pthread_mutex_t prog_mutex; |
| /* Flag whether the HSA program that consists of all the modules has been |
| finalized. */ |
| bool prog_finalized; |
| /* HSA executable - the finalized program that is used to locate kernels. */ |
| hsa_executable_t executable; |
| }; |
| |
| /* Information required to identify, finalize and run any given kernel. */ |
| |
| enum offload_kind {KIND_UNKNOWN, KIND_OPENMP, KIND_OPENACC}; |
| |
| struct kernel_info |
| { |
| /* Name of the kernel, required to locate it within the GCN object-code |
| module. */ |
| const char *name; |
| /* The specific agent the kernel has been or will be finalized for and run |
| on. */ |
| struct agent_info *agent; |
| /* The specific module where the kernel takes place. */ |
| struct module_info *module; |
| /* Information provided by mkoffload associated with the kernel. */ |
| struct hsa_kernel_description *description; |
| /* Mutex enforcing that at most once thread ever initializes a kernel for |
| use. A thread should have locked agent->module_rwlock for reading before |
| acquiring it. */ |
| pthread_mutex_t init_mutex; |
| /* Flag indicating whether the kernel has been initialized and all fields |
| below it contain valid data. */ |
| bool initialized; |
| /* Flag indicating that the kernel has a problem that blocks an execution. */ |
| bool initialization_failed; |
| /* The object to be put into the dispatch queue. */ |
| uint64_t object; |
| /* Required size of kernel arguments. */ |
| uint32_t kernarg_segment_size; |
| /* Required size of group segment. */ |
| uint32_t group_segment_size; |
| /* Required size of private segment. */ |
| uint32_t private_segment_size; |
| /* Set up for OpenMP or OpenACC? */ |
| enum offload_kind kind; |
| }; |
| |
| /* Information about a particular GCN module, its image and kernels. */ |
| |
| struct module_info |
| { |
| /* The description with which the program has registered the image. */ |
| struct gcn_image_desc *image_desc; |
| /* GCN heap allocation. */ |
| struct heap *heap; |
| /* Physical boundaries of the loaded module. */ |
| Elf64_Addr phys_address_start; |
| Elf64_Addr phys_address_end; |
| |
| bool constructors_run_p; |
| struct kernel_info *init_array_func, *fini_array_func; |
| |
| /* Number of kernels in this module. */ |
| int kernel_count; |
| /* An array of kernel_info structures describing each kernel in this |
| module. */ |
| struct kernel_info kernels[]; |
| }; |
| |
| /* A linked list of memory arenas allocated on the device. |
| These are only used by OpenMP, as a means to optimize per-team malloc. */ |
| |
| struct team_arena_list |
| { |
| struct team_arena_list *next; |
| |
| /* The number of teams determines the size of the allocation. */ |
| int num_teams; |
| /* The device address of the arena itself. */ |
| void *arena; |
| /* A flag to prevent two asynchronous kernels trying to use the same arena. |
| The mutex is locked until the kernel exits. */ |
| pthread_mutex_t in_use; |
| }; |
| |
| /* Information about the whole HSA environment and all of its agents. */ |
| |
| struct hsa_context_info |
| { |
| /* Whether the structure has been initialized. */ |
| bool initialized; |
| /* Number of usable GPU HSA agents in the system. */ |
| int agent_count; |
| /* Array of agent_info structures describing the individual HSA agents. */ |
| struct agent_info *agents; |
| /* Driver version string. */ |
| char driver_version_s[30]; |
| }; |
| |
| /* Format of the on-device heap. |
| |
| This must match the definition in Newlib and gcn-run. */ |
| |
| struct heap { |
| int64_t size; |
| char data[0]; |
| }; |
| |
| /* }}} */ |
| /* {{{ Global variables */ |
| |
| /* Information about the whole HSA environment and all of its agents. */ |
| |
| static struct hsa_context_info hsa_context; |
| |
| /* HSA runtime functions that are initialized in init_hsa_context. */ |
| |
| static struct hsa_runtime_fn_info hsa_fns; |
| |
| /* Heap space, allocated target-side, provided for use of newlib malloc. |
| Each module should have it's own heap allocated. |
| Beware that heap usage increases with OpenMP teams. See also arenas. */ |
| |
| static size_t gcn_kernel_heap_size = DEFAULT_GCN_HEAP_SIZE; |
| |
| /* Flag to decide whether print to stderr information about what is going on. |
| Set in init_debug depending on environment variables. */ |
| |
| static bool debug; |
| |
| /* Flag to decide if the runtime should suppress a possible fallback to host |
| execution. */ |
| |
| static bool suppress_host_fallback; |
| |
| /* Flag to locate HSA runtime shared library that is dlopened |
| by this plug-in. */ |
| |
| static const char *hsa_runtime_lib; |
| |
| /* Flag to decide if the runtime should support also CPU devices (can be |
| a simulator). */ |
| |
| static bool support_cpu_devices; |
| |
| /* Runtime dimension overrides. Zero indicates default. */ |
| |
| static int override_x_dim = 0; |
| static int override_z_dim = 0; |
| |
| /* }}} */ |
| /* {{{ Debug & Diagnostic */ |
| |
| /* Print a message to stderr if GCN_DEBUG value is set to true. */ |
| |
| #define DEBUG_PRINT(...) \ |
| do \ |
| { \ |
| if (debug) \ |
| { \ |
| fprintf (stderr, __VA_ARGS__); \ |
| } \ |
| } \ |
| while (false); |
| |
| /* Flush stderr if GCN_DEBUG value is set to true. */ |
| |
| #define DEBUG_FLUSH() \ |
| do { \ |
| if (debug) \ |
| fflush (stderr); \ |
| } while (false) |
| |
| /* Print a logging message with PREFIX to stderr if GCN_DEBUG value |
| is set to true. */ |
| |
| #define DEBUG_LOG(prefix, ...) \ |
| do \ |
| { \ |
| DEBUG_PRINT (prefix); \ |
| DEBUG_PRINT (__VA_ARGS__); \ |
| DEBUG_FLUSH (); \ |
| } while (false) |
| |
| /* Print a debugging message to stderr. */ |
| |
| #define GCN_DEBUG(...) DEBUG_LOG ("GCN debug: ", __VA_ARGS__) |
| |
| /* Print a warning message to stderr. */ |
| |
| #define GCN_WARNING(...) DEBUG_LOG ("GCN warning: ", __VA_ARGS__) |
| |
| /* Print HSA warning STR with an HSA STATUS code. */ |
| |
| static void |
| hsa_warn (const char *str, hsa_status_t status) |
| { |
| if (!debug) |
| return; |
| |
| const char *hsa_error_msg = "[unknown]"; |
| hsa_fns.hsa_status_string_fn (status, &hsa_error_msg); |
| |
| fprintf (stderr, "GCN warning: %s\nRuntime message: %s\n", str, |
| hsa_error_msg); |
| } |
| |
| /* Report a fatal error STR together with the HSA error corresponding to STATUS |
| and terminate execution of the current process. */ |
| |
| static void |
| hsa_fatal (const char *str, hsa_status_t status) |
| { |
| const char *hsa_error_msg = "[unknown]"; |
| hsa_fns.hsa_status_string_fn (status, &hsa_error_msg); |
| GOMP_PLUGIN_fatal ("GCN fatal error: %s\nRuntime message: %s\n", str, |
| hsa_error_msg); |
| } |
| |
| /* Like hsa_fatal, except only report error message, and return FALSE |
| for propagating error processing to outside of plugin. */ |
| |
| static bool |
| hsa_error (const char *str, hsa_status_t status) |
| { |
| const char *hsa_error_msg = "[unknown]"; |
| hsa_fns.hsa_status_string_fn (status, &hsa_error_msg); |
| GOMP_PLUGIN_error ("GCN fatal error: %s\nRuntime message: %s\n", str, |
| hsa_error_msg); |
| return false; |
| } |
| |
| /* Dump information about the available hardware. */ |
| |
| static void |
| dump_hsa_system_info (void) |
| { |
| hsa_status_t status; |
| |
| hsa_endianness_t endianness; |
| status = hsa_fns.hsa_system_get_info_fn (HSA_SYSTEM_INFO_ENDIANNESS, |
| &endianness); |
| if (status == HSA_STATUS_SUCCESS) |
| switch (endianness) |
| { |
| case HSA_ENDIANNESS_LITTLE: |
| GCN_DEBUG ("HSA_SYSTEM_INFO_ENDIANNESS: LITTLE\n"); |
| break; |
| case HSA_ENDIANNESS_BIG: |
| GCN_DEBUG ("HSA_SYSTEM_INFO_ENDIANNESS: BIG\n"); |
| break; |
| default: |
| GCN_WARNING ("HSA_SYSTEM_INFO_ENDIANNESS: UNKNOWN\n"); |
| } |
| else |
| GCN_WARNING ("HSA_SYSTEM_INFO_ENDIANNESS: FAILED\n"); |
| |
| uint8_t extensions[128]; |
| status = hsa_fns.hsa_system_get_info_fn (HSA_SYSTEM_INFO_EXTENSIONS, |
| &extensions); |
| if (status == HSA_STATUS_SUCCESS) |
| { |
| if (extensions[0] & (1 << HSA_EXTENSION_IMAGES)) |
| GCN_DEBUG ("HSA_SYSTEM_INFO_EXTENSIONS: IMAGES\n"); |
| } |
| else |
| GCN_WARNING ("HSA_SYSTEM_INFO_EXTENSIONS: FAILED\n"); |
| } |
| |
| /* Dump information about the available hardware. */ |
| |
| static void |
| dump_machine_model (hsa_machine_model_t machine_model, const char *s) |
| { |
| switch (machine_model) |
| { |
| case HSA_MACHINE_MODEL_SMALL: |
| GCN_DEBUG ("%s: SMALL\n", s); |
| break; |
| case HSA_MACHINE_MODEL_LARGE: |
| GCN_DEBUG ("%s: LARGE\n", s); |
| break; |
| default: |
| GCN_WARNING ("%s: UNKNOWN\n", s); |
| break; |
| } |
| } |
| |
| /* Dump information about the available hardware. */ |
| |
| static void |
| dump_profile (hsa_profile_t profile, const char *s) |
| { |
| switch (profile) |
| { |
| case HSA_PROFILE_FULL: |
| GCN_DEBUG ("%s: FULL\n", s); |
| break; |
| case HSA_PROFILE_BASE: |
| GCN_DEBUG ("%s: BASE\n", s); |
| break; |
| default: |
| GCN_WARNING ("%s: UNKNOWN\n", s); |
| break; |
| } |
| } |
| |
| /* Dump information about a device memory region. */ |
| |
| static hsa_status_t |
| dump_hsa_region (hsa_region_t region, void *data __attribute__((unused))) |
| { |
| hsa_status_t status; |
| |
| hsa_region_segment_t segment; |
| status = hsa_fns.hsa_region_get_info_fn (region, HSA_REGION_INFO_SEGMENT, |
| &segment); |
| if (status == HSA_STATUS_SUCCESS) |
| { |
| if (segment == HSA_REGION_SEGMENT_GLOBAL) |
| GCN_DEBUG ("HSA_REGION_INFO_SEGMENT: GLOBAL\n"); |
| else if (segment == HSA_REGION_SEGMENT_READONLY) |
| GCN_DEBUG ("HSA_REGION_INFO_SEGMENT: READONLY\n"); |
| else if (segment == HSA_REGION_SEGMENT_PRIVATE) |
| GCN_DEBUG ("HSA_REGION_INFO_SEGMENT: PRIVATE\n"); |
| else if (segment == HSA_REGION_SEGMENT_GROUP) |
| GCN_DEBUG ("HSA_REGION_INFO_SEGMENT: GROUP\n"); |
| else |
| GCN_WARNING ("HSA_REGION_INFO_SEGMENT: UNKNOWN\n"); |
| } |
| else |
| GCN_WARNING ("HSA_REGION_INFO_SEGMENT: FAILED\n"); |
| |
| if (segment == HSA_REGION_SEGMENT_GLOBAL) |
| { |
| uint32_t flags; |
| status |
| = hsa_fns.hsa_region_get_info_fn (region, HSA_REGION_INFO_GLOBAL_FLAGS, |
| &flags); |
| if (status == HSA_STATUS_SUCCESS) |
| { |
| if (flags & HSA_REGION_GLOBAL_FLAG_KERNARG) |
| GCN_DEBUG ("HSA_REGION_INFO_GLOBAL_FLAGS: KERNARG\n"); |
| if (flags & HSA_REGION_GLOBAL_FLAG_FINE_GRAINED) |
| GCN_DEBUG ("HSA_REGION_INFO_GLOBAL_FLAGS: FINE_GRAINED\n"); |
| if (flags & HSA_REGION_GLOBAL_FLAG_COARSE_GRAINED) |
| GCN_DEBUG ("HSA_REGION_INFO_GLOBAL_FLAGS: COARSE_GRAINED\n"); |
| } |
| else |
| GCN_WARNING ("HSA_REGION_INFO_GLOBAL_FLAGS: FAILED\n"); |
| } |
| |
| size_t size; |
| status = hsa_fns.hsa_region_get_info_fn (region, HSA_REGION_INFO_SIZE, &size); |
| if (status == HSA_STATUS_SUCCESS) |
| GCN_DEBUG ("HSA_REGION_INFO_SIZE: %zu\n", size); |
| else |
| GCN_WARNING ("HSA_REGION_INFO_SIZE: FAILED\n"); |
| |
| status |
| = hsa_fns.hsa_region_get_info_fn (region, HSA_REGION_INFO_ALLOC_MAX_SIZE, |
| &size); |
| if (status == HSA_STATUS_SUCCESS) |
| GCN_DEBUG ("HSA_REGION_INFO_ALLOC_MAX_SIZE: %zu\n", size); |
| else |
| GCN_WARNING ("HSA_REGION_INFO_ALLOC_MAX_SIZE: FAILED\n"); |
| |
| bool alloc_allowed; |
| status |
| = hsa_fns.hsa_region_get_info_fn (region, |
| HSA_REGION_INFO_RUNTIME_ALLOC_ALLOWED, |
| &alloc_allowed); |
| if (status == HSA_STATUS_SUCCESS) |
| GCN_DEBUG ("HSA_REGION_INFO_RUNTIME_ALLOC_ALLOWED: %u\n", alloc_allowed); |
| else |
| GCN_WARNING ("HSA_REGION_INFO_RUNTIME_ALLOC_ALLOWED: FAILED\n"); |
| |
| if (status != HSA_STATUS_SUCCESS || !alloc_allowed) |
| return HSA_STATUS_SUCCESS; |
| |
| status |
| = hsa_fns.hsa_region_get_info_fn (region, |
| HSA_REGION_INFO_RUNTIME_ALLOC_GRANULE, |
| &size); |
| if (status == HSA_STATUS_SUCCESS) |
| GCN_DEBUG ("HSA_REGION_INFO_RUNTIME_ALLOC_GRANULE: %zu\n", size); |
| else |
| GCN_WARNING ("HSA_REGION_INFO_RUNTIME_ALLOC_GRANULE: FAILED\n"); |
| |
| size_t align; |
| status |
| = hsa_fns.hsa_region_get_info_fn (region, |
| HSA_REGION_INFO_RUNTIME_ALLOC_ALIGNMENT, |
| &align); |
| if (status == HSA_STATUS_SUCCESS) |
| GCN_DEBUG ("HSA_REGION_INFO_RUNTIME_ALLOC_ALIGNMENT: %zu\n", align); |
| else |
| GCN_WARNING ("HSA_REGION_INFO_RUNTIME_ALLOC_ALIGNMENT: FAILED\n"); |
| |
| return HSA_STATUS_SUCCESS; |
| } |
| |
| /* Dump information about all the device memory regions. */ |
| |
| static void |
| dump_hsa_regions (hsa_agent_t agent) |
| { |
| hsa_status_t status; |
| status = hsa_fns.hsa_agent_iterate_regions_fn (agent, |
| dump_hsa_region, |
| NULL); |
| if (status != HSA_STATUS_SUCCESS) |
| hsa_error ("Dumping hsa regions failed", status); |
| } |
| |
| /* Dump information about the available devices. */ |
| |
| static hsa_status_t |
| dump_hsa_agent_info (hsa_agent_t agent, void *data __attribute__((unused))) |
| { |
| hsa_status_t status; |
| |
| char buf[64]; |
| status = hsa_fns.hsa_agent_get_info_fn (agent, HSA_AGENT_INFO_NAME, |
| &buf); |
| if (status == HSA_STATUS_SUCCESS) |
| GCN_DEBUG ("HSA_AGENT_INFO_NAME: %s\n", buf); |
| else |
| GCN_WARNING ("HSA_AGENT_INFO_NAME: FAILED\n"); |
| |
| status = hsa_fns.hsa_agent_get_info_fn (agent, HSA_AGENT_INFO_VENDOR_NAME, |
| &buf); |
| if (status == HSA_STATUS_SUCCESS) |
| GCN_DEBUG ("HSA_AGENT_INFO_VENDOR_NAME: %s\n", buf); |
| else |
| GCN_WARNING ("HSA_AGENT_INFO_VENDOR_NAME: FAILED\n"); |
| |
| hsa_machine_model_t machine_model; |
| status |
| = hsa_fns.hsa_agent_get_info_fn (agent, HSA_AGENT_INFO_MACHINE_MODEL, |
| &machine_model); |
| if (status == HSA_STATUS_SUCCESS) |
| dump_machine_model (machine_model, "HSA_AGENT_INFO_MACHINE_MODEL"); |
| else |
| GCN_WARNING ("HSA_AGENT_INFO_MACHINE_MODEL: FAILED\n"); |
| |
| hsa_profile_t profile; |
| status = hsa_fns.hsa_agent_get_info_fn (agent, HSA_AGENT_INFO_PROFILE, |
| &profile); |
| if (status == HSA_STATUS_SUCCESS) |
| dump_profile (profile, "HSA_AGENT_INFO_PROFILE"); |
| else |
| GCN_WARNING ("HSA_AGENT_INFO_PROFILE: FAILED\n"); |
| |
| hsa_device_type_t device_type; |
| status = hsa_fns.hsa_agent_get_info_fn (agent, HSA_AGENT_INFO_DEVICE, |
| &device_type); |
| if (status == HSA_STATUS_SUCCESS) |
| { |
| switch (device_type) |
| { |
| case HSA_DEVICE_TYPE_CPU: |
| GCN_DEBUG ("HSA_AGENT_INFO_DEVICE: CPU\n"); |
| break; |
| case HSA_DEVICE_TYPE_GPU: |
| GCN_DEBUG ("HSA_AGENT_INFO_DEVICE: GPU\n"); |
| break; |
| case HSA_DEVICE_TYPE_DSP: |
| GCN_DEBUG ("HSA_AGENT_INFO_DEVICE: DSP\n"); |
| break; |
| default: |
| GCN_WARNING ("HSA_AGENT_INFO_DEVICE: UNKNOWN\n"); |
| break; |
| } |
| } |
| else |
| GCN_WARNING ("HSA_AGENT_INFO_DEVICE: FAILED\n"); |
| |
| uint32_t cu_count; |
| status = hsa_fns.hsa_agent_get_info_fn |
| (agent, HSA_AMD_AGENT_INFO_COMPUTE_UNIT_COUNT, &cu_count); |
| if (status == HSA_STATUS_SUCCESS) |
| GCN_DEBUG ("HSA_AMD_AGENT_INFO_COMPUTE_UNIT_COUNT: %u\n", cu_count); |
| else |
| GCN_WARNING ("HSA_AMD_AGENT_INFO_COMPUTE_UNIT_COUNT: FAILED\n"); |
| |
| uint32_t size; |
| status = hsa_fns.hsa_agent_get_info_fn (agent, HSA_AGENT_INFO_WAVEFRONT_SIZE, |
| &size); |
| if (status == HSA_STATUS_SUCCESS) |
| GCN_DEBUG ("HSA_AGENT_INFO_WAVEFRONT_SIZE: %u\n", size); |
| else |
| GCN_WARNING ("HSA_AGENT_INFO_WAVEFRONT_SIZE: FAILED\n"); |
| |
| uint32_t max_dim; |
| status = hsa_fns.hsa_agent_get_info_fn (agent, |
| HSA_AGENT_INFO_WORKGROUP_MAX_DIM, |
| &max_dim); |
| if (status == HSA_STATUS_SUCCESS) |
| GCN_DEBUG ("HSA_AGENT_INFO_WORKGROUP_MAX_DIM: %u\n", max_dim); |
| else |
| GCN_WARNING ("HSA_AGENT_INFO_WORKGROUP_MAX_DIM: FAILED\n"); |
| |
| uint32_t max_size; |
| status = hsa_fns.hsa_agent_get_info_fn (agent, |
| HSA_AGENT_INFO_WORKGROUP_MAX_SIZE, |
| &max_size); |
| if (status == HSA_STATUS_SUCCESS) |
| GCN_DEBUG ("HSA_AGENT_INFO_WORKGROUP_MAX_SIZE: %u\n", max_size); |
| else |
| GCN_WARNING ("HSA_AGENT_INFO_WORKGROUP_MAX_SIZE: FAILED\n"); |
| |
| uint32_t grid_max_dim; |
| status = hsa_fns.hsa_agent_get_info_fn (agent, HSA_AGENT_INFO_GRID_MAX_DIM, |
| &grid_max_dim); |
| if (status == HSA_STATUS_SUCCESS) |
| GCN_DEBUG ("HSA_AGENT_INFO_GRID_MAX_DIM: %u\n", grid_max_dim); |
| else |
| GCN_WARNING ("HSA_AGENT_INFO_GRID_MAX_DIM: FAILED\n"); |
| |
| uint32_t grid_max_size; |
| status = hsa_fns.hsa_agent_get_info_fn (agent, HSA_AGENT_INFO_GRID_MAX_SIZE, |
| &grid_max_size); |
| if (status == HSA_STATUS_SUCCESS) |
| GCN_DEBUG ("HSA_AGENT_INFO_GRID_MAX_SIZE: %u\n", grid_max_size); |
| else |
| GCN_WARNING ("HSA_AGENT_INFO_GRID_MAX_SIZE: FAILED\n"); |
| |
| dump_hsa_regions (agent); |
| |
| return HSA_STATUS_SUCCESS; |
| } |
| |
| /* Forward reference. */ |
| |
| static char *get_executable_symbol_name (hsa_executable_symbol_t symbol); |
| |
| /* Helper function for dump_executable_symbols. */ |
| |
| static hsa_status_t |
| dump_executable_symbol (hsa_executable_t executable, |
| hsa_executable_symbol_t symbol, |
| void *data __attribute__((unused))) |
| { |
| char *name = get_executable_symbol_name (symbol); |
| |
| if (name) |
| { |
| GCN_DEBUG ("executable symbol: %s\n", name); |
| free (name); |
| } |
| |
| return HSA_STATUS_SUCCESS; |
| } |
| |
| /* Dump all global symbol in an executable. */ |
| |
| static void |
| dump_executable_symbols (hsa_executable_t executable) |
| { |
| hsa_status_t status; |
| status |
| = hsa_fns.hsa_executable_iterate_symbols_fn (executable, |
| dump_executable_symbol, |
| NULL); |
| if (status != HSA_STATUS_SUCCESS) |
| hsa_fatal ("Could not dump HSA executable symbols", status); |
| } |
| |
| /* Dump kernel DISPATCH data structure and indent it by INDENT spaces. */ |
| |
| static void |
| print_kernel_dispatch (struct kernel_dispatch *dispatch, unsigned indent) |
| { |
| struct kernargs *kernargs = (struct kernargs *)dispatch->kernarg_address; |
| |
| fprintf (stderr, "%*sthis: %p\n", indent, "", dispatch); |
| fprintf (stderr, "%*squeue: %p\n", indent, "", dispatch->queue); |
| fprintf (stderr, "%*skernarg_address: %p\n", indent, "", kernargs); |
| fprintf (stderr, "%*sheap address: %p\n", indent, "", |
| (void*)kernargs->heap_ptr); |
| fprintf (stderr, "%*sarena address: %p\n", indent, "", |
| (void*)kernargs->arena_ptr); |
| fprintf (stderr, "%*sobject: %lu\n", indent, "", dispatch->object); |
| fprintf (stderr, "%*sprivate_segment_size: %u\n", indent, "", |
| dispatch->private_segment_size); |
| fprintf (stderr, "%*sgroup_segment_size: %u\n", indent, "", |
| dispatch->group_segment_size); |
| fprintf (stderr, "\n"); |
| } |
| |
| /* }}} */ |
| /* {{{ Utility functions */ |
| |
| /* Cast the thread local storage to gcn_thread. */ |
| |
| static inline struct gcn_thread * |
| gcn_thread (void) |
| { |
| return (struct gcn_thread *) GOMP_PLUGIN_acc_thread (); |
| } |
| |
| /* Initialize debug and suppress_host_fallback according to the environment. */ |
| |
| static void |
| init_environment_variables (void) |
| { |
| if (secure_getenv ("GCN_DEBUG")) |
| debug = true; |
| else |
| debug = false; |
| |
| if (secure_getenv ("GCN_SUPPRESS_HOST_FALLBACK")) |
| suppress_host_fallback = true; |
| else |
| suppress_host_fallback = false; |
| |
| hsa_runtime_lib = secure_getenv ("HSA_RUNTIME_LIB"); |
| if (hsa_runtime_lib == NULL) |
| hsa_runtime_lib = "libhsa-runtime64.so.1"; |
| |
| support_cpu_devices = secure_getenv ("GCN_SUPPORT_CPU_DEVICES"); |
| |
| const char *x = secure_getenv ("GCN_NUM_TEAMS"); |
| if (!x) |
| x = secure_getenv ("GCN_NUM_GANGS"); |
| if (x) |
| override_x_dim = atoi (x); |
| |
| const char *z = secure_getenv ("GCN_NUM_THREADS"); |
| if (!z) |
| z = secure_getenv ("GCN_NUM_WORKERS"); |
| if (z) |
| override_z_dim = atoi (z); |
| |
| const char *heap = secure_getenv ("GCN_HEAP_SIZE"); |
| if (heap) |
| { |
| size_t tmp = atol (heap); |
| if (tmp) |
| gcn_kernel_heap_size = tmp; |
| } |
| } |
| |
| /* Return malloc'd string with name of SYMBOL. */ |
| |
| static char * |
| get_executable_symbol_name (hsa_executable_symbol_t symbol) |
| { |
| hsa_status_t status; |
| char *res; |
| uint32_t len; |
| const hsa_executable_symbol_info_t info_name_length |
| = HSA_EXECUTABLE_SYMBOL_INFO_NAME_LENGTH; |
| |
| status = hsa_fns.hsa_executable_symbol_get_info_fn (symbol, info_name_length, |
| &len); |
| if (status != HSA_STATUS_SUCCESS) |
| { |
| hsa_error ("Could not get length of symbol name", status); |
| return NULL; |
| } |
| |
| res = GOMP_PLUGIN_malloc (len + 1); |
| |
| const hsa_executable_symbol_info_t info_name |
| = HSA_EXECUTABLE_SYMBOL_INFO_NAME; |
| |
| status = hsa_fns.hsa_executable_symbol_get_info_fn (symbol, info_name, res); |
| |
| if (status != HSA_STATUS_SUCCESS) |
| { |
| hsa_error ("Could not get symbol name", status); |
| free (res); |
| return NULL; |
| } |
| |
| res[len] = '\0'; |
| |
| return res; |
| } |
| |
| /* Get the number of GPU Compute Units. */ |
| |
| static int |
| get_cu_count (struct agent_info *agent) |
| { |
| uint32_t cu_count; |
| hsa_status_t status = hsa_fns.hsa_agent_get_info_fn |
| (agent->id, HSA_AMD_AGENT_INFO_COMPUTE_UNIT_COUNT, &cu_count); |
| if (status == HSA_STATUS_SUCCESS) |
| return cu_count; |
| else |
| return 64; /* The usual number for older devices. */ |
| } |
| |
| /* Calculate the maximum grid size for OMP threads / OACC workers. |
| This depends on the kernel's resource usage levels. */ |
| |
| static int |
| limit_worker_threads (int threads) |
| { |
| /* FIXME Do something more inteligent here. |
| GCN can always run 4 threads within a Compute Unit, but |
| more than that depends on register usage. */ |
| if (threads > 16) |
| threads = 16; |
| return threads; |
| } |
| |
| /* Parse the target attributes INPUT provided by the compiler and return true |
| if we should run anything all. If INPUT is NULL, fill DEF with default |
| values, then store INPUT or DEF into *RESULT. |
| |
| This is used for OpenMP only. */ |
| |
| static bool |
| parse_target_attributes (void **input, |
| struct GOMP_kernel_launch_attributes *def, |
| struct GOMP_kernel_launch_attributes **result, |
| struct agent_info *agent) |
| { |
| if (!input) |
| GOMP_PLUGIN_fatal ("No target arguments provided"); |
| |
| bool grid_attrs_found = false; |
| bool gcn_dims_found = false; |
| int gcn_teams = 0; |
| int gcn_threads = 0; |
| while (*input) |
| { |
| intptr_t id = (intptr_t) *input++, val; |
| |
| if (id & GOMP_TARGET_ARG_SUBSEQUENT_PARAM) |
| val = (intptr_t) *input++; |
| else |
| val = id >> GOMP_TARGET_ARG_VALUE_SHIFT; |
| |
| val = (val > INT_MAX) ? INT_MAX : val; |
| |
| if ((id & GOMP_TARGET_ARG_DEVICE_MASK) == GOMP_DEVICE_GCN |
| && ((id & GOMP_TARGET_ARG_ID_MASK) |
| == GOMP_TARGET_ARG_HSA_KERNEL_ATTRIBUTES)) |
| { |
| grid_attrs_found = true; |
| break; |
| } |
| else if ((id & GOMP_TARGET_ARG_DEVICE_MASK) |
| == GOMP_TARGET_ARG_DEVICE_ALL) |
| { |
| gcn_dims_found = true; |
| switch (id & GOMP_TARGET_ARG_ID_MASK) |
| { |
| case GOMP_TARGET_ARG_NUM_TEAMS: |
| gcn_teams = val; |
| break; |
| case GOMP_TARGET_ARG_THREAD_LIMIT: |
| gcn_threads = limit_worker_threads (val); |
| break; |
| default: |
| ; |
| } |
| } |
| } |
| |
| if (gcn_dims_found) |
| { |
| if (agent->device_isa == EF_AMDGPU_MACH_AMDGCN_GFX900 |
| && gcn_threads == 0 && override_z_dim == 0) |
| { |
| gcn_threads = 4; |
| GCN_WARNING ("VEGA BUG WORKAROUND: reducing default number of " |
| "threads to 4 per team.\n"); |
| GCN_WARNING (" - If this is not a Vega 10 device, please use " |
| "GCN_NUM_THREADS=16\n"); |
| } |
| |
| def->ndim = 3; |
| /* Fiji has 64 CUs, but Vega20 has 60. */ |
| def->gdims[0] = (gcn_teams > 0) ? gcn_teams : get_cu_count (agent); |
| /* Each thread is 64 work items wide. */ |
| def->gdims[1] = 64; |
| /* A work group can have 16 wavefronts. */ |
| def->gdims[2] = (gcn_threads > 0) ? gcn_threads : 16; |
| def->wdims[0] = 1; /* Single team per work-group. */ |
| def->wdims[1] = 64; |
| def->wdims[2] = 16; |
| *result = def; |
| return true; |
| } |
| else if (!grid_attrs_found) |
| { |
| def->ndim = 1; |
| def->gdims[0] = 1; |
| def->gdims[1] = 1; |
| def->gdims[2] = 1; |
| def->wdims[0] = 1; |
| def->wdims[1] = 1; |
| def->wdims[2] = 1; |
| *result = def; |
| GCN_WARNING ("GOMP_OFFLOAD_run called with no launch attributes\n"); |
| return true; |
| } |
| |
| struct GOMP_kernel_launch_attributes *kla; |
| kla = (struct GOMP_kernel_launch_attributes *) *input; |
| *result = kla; |
| if (kla->ndim == 0 || kla->ndim > 3) |
| GOMP_PLUGIN_fatal ("Invalid number of dimensions (%u)", kla->ndim); |
| |
| GCN_DEBUG ("GOMP_OFFLOAD_run called with %u dimensions:\n", kla->ndim); |
| unsigned i; |
| for (i = 0; i < kla->ndim; i++) |
| { |
| GCN_DEBUG (" Dimension %u: grid size %u and group size %u\n", i, |
| kla->gdims[i], kla->wdims[i]); |
| if (kla->gdims[i] == 0) |
| return false; |
| } |
| return true; |
| } |
| |
| /* Return the group size given the requested GROUP size, GRID size and number |
| of grid dimensions NDIM. */ |
| |
| static uint32_t |
| get_group_size (uint32_t ndim, uint32_t grid, uint32_t group) |
| { |
| if (group == 0) |
| { |
| /* TODO: Provide a default via environment or device characteristics. */ |
| if (ndim == 1) |
| group = 64; |
| else if (ndim == 2) |
| group = 8; |
| else |
| group = 4; |
| } |
| |
| if (group > grid) |
| group = grid; |
| return group; |
| } |
| |
| /* Atomically store pair of uint16_t values (HEADER and REST) to a PACKET. */ |
| |
| static void |
| packet_store_release (uint32_t* packet, uint16_t header, uint16_t rest) |
| { |
| __atomic_store_n (packet, header | (rest << 16), __ATOMIC_RELEASE); |
| } |
| |
| /* A never-called callback for the HSA command queues. These signal events |
| that we don't use, so we trigger an error. |
| |
| This "queue" is not to be confused with the async queues, below. */ |
| |
| static void |
| hsa_queue_callback (hsa_status_t status, |
| hsa_queue_t *queue __attribute__ ((unused)), |
| void *data __attribute__ ((unused))) |
| { |
| hsa_fatal ("Asynchronous queue error", status); |
| } |
| |
| /* }}} */ |
| /* {{{ HSA initialization */ |
| |
| /* Populate hsa_fns with the function addresses from libhsa-runtime64.so. */ |
| |
| static bool |
| init_hsa_runtime_functions (void) |
| { |
| #define DLSYM_FN(function) \ |
| hsa_fns.function##_fn = dlsym (handle, #function); \ |
| if (hsa_fns.function##_fn == NULL) \ |
| return false; |
| void *handle = dlopen (hsa_runtime_lib, RTLD_LAZY); |
| if (handle == NULL) |
| return false; |
| |
| DLSYM_FN (hsa_status_string) |
| DLSYM_FN (hsa_system_get_info) |
| DLSYM_FN (hsa_agent_get_info) |
| DLSYM_FN (hsa_init) |
| DLSYM_FN (hsa_iterate_agents) |
| DLSYM_FN (hsa_region_get_info) |
| DLSYM_FN (hsa_queue_create) |
| DLSYM_FN (hsa_agent_iterate_regions) |
| DLSYM_FN (hsa_executable_destroy) |
| DLSYM_FN (hsa_executable_create) |
| DLSYM_FN (hsa_executable_global_variable_define) |
| DLSYM_FN (hsa_executable_load_code_object) |
| DLSYM_FN (hsa_executable_freeze) |
| DLSYM_FN (hsa_signal_create) |
| DLSYM_FN (hsa_memory_allocate) |
| DLSYM_FN (hsa_memory_assign_agent) |
| DLSYM_FN (hsa_memory_copy) |
| DLSYM_FN (hsa_memory_free) |
| DLSYM_FN (hsa_signal_destroy) |
| DLSYM_FN (hsa_executable_get_symbol) |
| DLSYM_FN (hsa_executable_symbol_get_info) |
| DLSYM_FN (hsa_executable_iterate_symbols) |
| DLSYM_FN (hsa_queue_add_write_index_release) |
| DLSYM_FN (hsa_queue_load_read_index_acquire) |
| DLSYM_FN (hsa_signal_wait_acquire) |
| DLSYM_FN (hsa_signal_store_relaxed) |
| DLSYM_FN (hsa_signal_store_release) |
| DLSYM_FN (hsa_signal_load_acquire) |
| DLSYM_FN (hsa_queue_destroy) |
| DLSYM_FN (hsa_code_object_deserialize) |
| return true; |
| #undef DLSYM_FN |
| } |
| |
| /* Return true if the agent is a GPU and can accept of concurrent submissions |
| from different threads. */ |
| |
| static bool |
| suitable_hsa_agent_p (hsa_agent_t agent) |
| { |
| hsa_device_type_t device_type; |
| hsa_status_t status |
| = hsa_fns.hsa_agent_get_info_fn (agent, HSA_AGENT_INFO_DEVICE, |
| &device_type); |
| if (status != HSA_STATUS_SUCCESS) |
| return false; |
| |
| switch (device_type) |
| { |
| case HSA_DEVICE_TYPE_GPU: |
| break; |
| case HSA_DEVICE_TYPE_CPU: |
| if (!support_cpu_devices) |
| return false; |
| break; |
| default: |
| return false; |
| } |
| |
| uint32_t features = 0; |
| status = hsa_fns.hsa_agent_get_info_fn (agent, HSA_AGENT_INFO_FEATURE, |
| &features); |
| if (status != HSA_STATUS_SUCCESS |
| || !(features & HSA_AGENT_FEATURE_KERNEL_DISPATCH)) |
| return false; |
| hsa_queue_type_t queue_type; |
| status = hsa_fns.hsa_agent_get_info_fn (agent, HSA_AGENT_INFO_QUEUE_TYPE, |
| &queue_type); |
| if (status != HSA_STATUS_SUCCESS |
| || (queue_type != HSA_QUEUE_TYPE_MULTI)) |
| return false; |
| |
| return true; |
| } |
| |
| /* Callback of hsa_iterate_agents; if AGENT is a GPU device, increment |
| agent_count in hsa_context. */ |
| |
| static hsa_status_t |
| count_gpu_agents (hsa_agent_t agent, void *data __attribute__ ((unused))) |
| { |
| if (suitable_hsa_agent_p (agent)) |
| hsa_context.agent_count++; |
| return HSA_STATUS_SUCCESS; |
| } |
| |
| /* Callback of hsa_iterate_agents; if AGENT is a GPU device, assign the agent |
| id to the describing structure in the hsa context. The index of the |
| structure is pointed to by DATA, increment it afterwards. */ |
| |
| static hsa_status_t |
| assign_agent_ids (hsa_agent_t agent, void *data) |
| { |
| if (suitable_hsa_agent_p (agent)) |
| { |
| int *agent_index = (int *) data; |
| hsa_context.agents[*agent_index].id = agent; |
| ++*agent_index; |
| } |
| return HSA_STATUS_SUCCESS; |
| } |
| |
| /* Initialize hsa_context if it has not already been done. |
| Return TRUE on success. */ |
| |
| static bool |
| init_hsa_context (void) |
| { |
| hsa_status_t status; |
| int agent_index = 0; |
| |
| if (hsa_context.initialized) |
| return true; |
| init_environment_variables (); |
| if (!init_hsa_runtime_functions ()) |
| { |
| GCN_WARNING ("Run-time could not be dynamically opened\n"); |
| if (suppress_host_fallback) |
| GOMP_PLUGIN_fatal ("GCN host fallback has been suppressed"); |
| return false; |
| } |
| status = hsa_fns.hsa_init_fn (); |
| if (status != HSA_STATUS_SUCCESS) |
| return hsa_error ("Run-time could not be initialized", status); |
| GCN_DEBUG ("HSA run-time initialized for GCN\n"); |
| |
| if (debug) |
| dump_hsa_system_info (); |
| |
| status = hsa_fns.hsa_iterate_agents_fn (count_gpu_agents, NULL); |
| if (status != HSA_STATUS_SUCCESS) |
| return hsa_error ("GCN GPU devices could not be enumerated", status); |
| GCN_DEBUG ("There are %i GCN GPU devices.\n", hsa_context.agent_count); |
| |
| hsa_context.agents |
| = GOMP_PLUGIN_malloc_cleared (hsa_context.agent_count |
| * sizeof (struct agent_info)); |
| status = hsa_fns.hsa_iterate_agents_fn (assign_agent_ids, &agent_index); |
| if (status != HSA_STATUS_SUCCESS) |
| return hsa_error ("Scanning compute agents failed", status); |
| if (agent_index != hsa_context.agent_count) |
| { |
| GOMP_PLUGIN_error ("Failed to assign IDs to all GCN agents"); |
| return false; |
| } |
| |
| if (debug) |
| { |
| status = hsa_fns.hsa_iterate_agents_fn (dump_hsa_agent_info, NULL); |
| if (status != HSA_STATUS_SUCCESS) |
| GOMP_PLUGIN_error ("Failed to list all HSA runtime agents"); |
| } |
| |
| uint16_t minor, major; |
| status = hsa_fns.hsa_system_get_info_fn (HSA_SYSTEM_INFO_VERSION_MINOR, |
| &minor); |
| if (status != HSA_STATUS_SUCCESS) |
| GOMP_PLUGIN_error ("Failed to obtain HSA runtime minor version"); |
| status = hsa_fns.hsa_system_get_info_fn (HSA_SYSTEM_INFO_VERSION_MAJOR, |
| &major); |
| if (status != HSA_STATUS_SUCCESS) |
| GOMP_PLUGIN_error ("Failed to obtain HSA runtime major version"); |
| |
| size_t len = sizeof hsa_context.driver_version_s; |
| int printed = snprintf (hsa_context.driver_version_s, len, |
| "HSA Runtime %hu.%hu", (unsigned short int)major, |
| (unsigned short int)minor); |
| if (printed >= len) |
| GCN_WARNING ("HSA runtime version string was truncated." |
| "Version %hu.%hu is too long.", (unsigned short int)major, |
| (unsigned short int)minor); |
| |
| hsa_context.initialized = true; |
| return true; |
| } |
| |
| /* Verify that hsa_context has already been initialized and return the |
| agent_info structure describing device number N. Return NULL on error. */ |
| |
| static struct agent_info * |
| get_agent_info (int n) |
| { |
| if (!hsa_context.initialized) |
| { |
| GOMP_PLUGIN_error ("Attempt to use uninitialized GCN context."); |
| return NULL; |
| } |
| if (n >= hsa_context.agent_count) |
| { |
| GOMP_PLUGIN_error ("Request to operate on non-existent GCN device %i", n); |
| return NULL; |
| } |
| if (!hsa_context.agents[n].initialized) |
| { |
| GOMP_PLUGIN_error ("Attempt to use an uninitialized GCN agent."); |
| return NULL; |
| } |
| return &hsa_context.agents[n]; |
| } |
| |
| /* Callback of hsa_agent_iterate_regions, via get_*_memory_region functions. |
| |
| Selects (breaks at) a suitable region of type KIND. */ |
| |
| static hsa_status_t |
| get_memory_region (hsa_region_t region, hsa_region_t *retval, |
| hsa_region_global_flag_t kind) |
| { |
| hsa_status_t status; |
| hsa_region_segment_t segment; |
| |
| status = hsa_fns.hsa_region_get_info_fn (region, HSA_REGION_INFO_SEGMENT, |
| &segment); |
| if (status != HSA_STATUS_SUCCESS) |
| return status; |
| if (segment != HSA_REGION_SEGMENT_GLOBAL) |
| return HSA_STATUS_SUCCESS; |
| |
| uint32_t flags; |
| status = hsa_fns.hsa_region_get_info_fn (region, HSA_REGION_INFO_GLOBAL_FLAGS, |
| &flags); |
| if (status != HSA_STATUS_SUCCESS) |
| return status; |
| if (flags & kind) |
| { |
| *retval = region; |
| return HSA_STATUS_INFO_BREAK; |
| } |
| return HSA_STATUS_SUCCESS; |
| } |
| |
| /* Callback of hsa_agent_iterate_regions. |
| |
| Selects a kernargs memory region. */ |
| |
| static hsa_status_t |
| get_kernarg_memory_region (hsa_region_t region, void *data) |
| { |
| return get_memory_region (region, (hsa_region_t *)data, |
| HSA_REGION_GLOBAL_FLAG_KERNARG); |
| } |
| |
| /* Callback of hsa_agent_iterate_regions. |
| |
| Selects a coarse-grained memory region suitable for the heap and |
| offload data. */ |
| |
| static hsa_status_t |
| get_data_memory_region (hsa_region_t region, void *data) |
| { |
| return get_memory_region (region, (hsa_region_t *)data, |
| HSA_REGION_GLOBAL_FLAG_COARSE_GRAINED); |
| } |
| |
| static int |
| elf_gcn_isa_field (Elf64_Ehdr *image) |
| { |
| return image->e_flags & EF_AMDGPU_MACH_MASK; |
| } |
| |
| const static char *gcn_gfx803_s = "gfx803"; |
| const static char *gcn_gfx900_s = "gfx900"; |
| const static char *gcn_gfx906_s = "gfx906"; |
| const static char *gcn_gfx908_s = "gfx908"; |
| const static int gcn_isa_name_len = 6; |
| |
| /* Returns the name that the HSA runtime uses for the ISA or NULL if we do not |
| support the ISA. */ |
| |
| static const char* |
| isa_hsa_name (int isa) { |
| switch(isa) |
| { |
| case EF_AMDGPU_MACH_AMDGCN_GFX803: |
| return gcn_gfx803_s; |
| case EF_AMDGPU_MACH_AMDGCN_GFX900: |
| return gcn_gfx900_s; |
| case EF_AMDGPU_MACH_AMDGCN_GFX906: |
| return gcn_gfx906_s; |
| case EF_AMDGPU_MACH_AMDGCN_GFX908: |
| return gcn_gfx908_s; |
| } |
| return NULL; |
| } |
| |
| /* Returns the user-facing name that GCC uses to identify the architecture (e.g. |
| with -march) or NULL if we do not support the ISA. |
| Keep in sync with /gcc/config/gcn/gcn.{c,opt}. */ |
| |
| static const char* |
| isa_gcc_name (int isa) { |
| switch(isa) |
| { |
| case EF_AMDGPU_MACH_AMDGCN_GFX803: |
| return "fiji"; |
| default: |
| return isa_hsa_name (isa); |
| } |
| } |
| |
| /* Returns the code which is used in the GCN object code to identify the ISA with |
| the given name (as used by the HSA runtime). */ |
| |
| static gcn_isa |
| isa_code(const char *isa) { |
| if (!strncmp (isa, gcn_gfx803_s, gcn_isa_name_len)) |
| return EF_AMDGPU_MACH_AMDGCN_GFX803; |
| |
| if (!strncmp (isa, gcn_gfx900_s, gcn_isa_name_len)) |
| return EF_AMDGPU_MACH_AMDGCN_GFX900; |
| |
| if (!strncmp (isa, gcn_gfx906_s, gcn_isa_name_len)) |
| return EF_AMDGPU_MACH_AMDGCN_GFX906; |
| |
| if (!strncmp (isa, gcn_gfx908_s, gcn_isa_name_len)) |
| return EF_AMDGPU_MACH_AMDGCN_GFX908; |
| |
| return -1; |
| } |
| |
| /* }}} */ |
| /* {{{ Run */ |
| |
| /* Create or reuse a team arena. |
| |
| Team arenas are used by OpenMP to avoid calling malloc multiple times |
| while setting up each team. This is purely a performance optimization. |
| |
| Allocating an arena also costs performance, albeit on the host side, so |
| this function will reuse an existing arena if a large enough one is idle. |
| The arena is released, but not deallocated, when the kernel exits. */ |
| |
| static void * |
| get_team_arena (struct agent_info *agent, int num_teams) |
| { |
| struct team_arena_list **next_ptr = &agent->team_arena_list; |
| struct team_arena_list *item; |
| |
| for (item = *next_ptr; item; next_ptr = &item->next, item = item->next) |
| { |
| if (item->num_teams < num_teams) |
| continue; |
| |
| if (pthread_mutex_trylock (&item->in_use)) |
| continue; |
| |
| return item->arena; |
| } |
| |
| GCN_DEBUG ("Creating a new arena for %d teams\n", num_teams); |
| |
| if (pthread_mutex_lock (&agent->team_arena_write_lock)) |
| { |
| GOMP_PLUGIN_error ("Could not lock a GCN agent program mutex"); |
| return false; |
| } |
| item = malloc (sizeof (*item)); |
| item->num_teams = num_teams; |
| item->next = NULL; |
| *next_ptr = item; |
| |
| if (pthread_mutex_init (&item->in_use, NULL)) |
| { |
| GOMP_PLUGIN_error ("Failed to initialize a GCN team arena write mutex"); |
| return false; |
| } |
| if (pthread_mutex_lock (&item->in_use)) |
| { |
| GOMP_PLUGIN_error ("Could not lock a GCN agent program mutex"); |
| return false; |
| } |
| if (pthread_mutex_unlock (&agent->team_arena_write_lock)) |
| { |
| GOMP_PLUGIN_error ("Could not unlock a GCN agent program mutex"); |
| return false; |
| } |
| |
| const int TEAM_ARENA_SIZE = 64*1024; /* Must match libgomp.h. */ |
| hsa_status_t status; |
| status = hsa_fns.hsa_memory_allocate_fn (agent->data_region, |
| TEAM_ARENA_SIZE*num_teams, |
| &item->arena); |
| if (status != HSA_STATUS_SUCCESS) |
| hsa_fatal ("Could not allocate memory for GCN kernel arena", status); |
| status = hsa_fns.hsa_memory_assign_agent_fn (item->arena, agent->id, |
| HSA_ACCESS_PERMISSION_RW); |
| if (status != HSA_STATUS_SUCCESS) |
| hsa_fatal ("Could not assign arena memory to device", status); |
| |
| return item->arena; |
| } |
| |
| /* Mark a team arena available for reuse. */ |
| |
| static void |
| release_team_arena (struct agent_info* agent, void *arena) |
| { |
| struct team_arena_list *item; |
| |
| for (item = agent->team_arena_list; item; item = item->next) |
| { |
| if (item->arena == arena) |
| { |
| if (pthread_mutex_unlock (&item->in_use)) |
| GOMP_PLUGIN_error ("Could not unlock a GCN agent program mutex"); |
| return; |
| } |
| } |
| GOMP_PLUGIN_error ("Could not find a GCN arena to release."); |
| } |
| |
| /* Clean up all the allocated team arenas. */ |
| |
| static bool |
| destroy_team_arenas (struct agent_info *agent) |
| { |
| struct team_arena_list *item, *next; |
| |
| for (item = agent->team_arena_list; item; item = next) |
| { |
| next = item->next; |
| hsa_fns.hsa_memory_free_fn (item->arena); |
| if (pthread_mutex_destroy (&item->in_use)) |
| { |
| GOMP_PLUGIN_error ("Failed to destroy a GCN team arena mutex"); |
| return false; |
| } |
| free (item); |
| } |
| agent->team_arena_list = NULL; |
| |
| return true; |
| } |
| |
| /* Allocate memory on a specified device. */ |
| |
| static void * |
| alloc_by_agent (struct agent_info *agent, size_t size) |
| { |
| GCN_DEBUG ("Allocating %zu bytes on device %d\n", size, agent->device_id); |
| |
| /* Zero-size allocations are invalid, so in order to return a valid pointer |
| we need to pass a valid size. One source of zero-size allocations is |
| kernargs for kernels that have no inputs or outputs (the kernel may |
| only use console output, for example). */ |
| if (size == 0) |
| size = 4; |
| |
| void *ptr; |
| hsa_status_t status = hsa_fns.hsa_memory_allocate_fn (agent->data_region, |
| size, &ptr); |
| if (status != HSA_STATUS_SUCCESS) |
| { |
| hsa_error ("Could not allocate device memory", status); |
| return NULL; |
| } |
| |
| status = hsa_fns.hsa_memory_assign_agent_fn (ptr, agent->id, |
| HSA_ACCESS_PERMISSION_RW); |
| if (status != HSA_STATUS_SUCCESS) |
| { |
| hsa_error ("Could not assign data memory to device", status); |
| return NULL; |
| } |
| |
| struct goacc_thread *thr = GOMP_PLUGIN_goacc_thread (); |
| bool profiling_dispatch_p |
| = __builtin_expect (thr != NULL && thr->prof_info != NULL, false); |
| if (profiling_dispatch_p) |
| { |
| acc_prof_info *prof_info = thr->prof_info; |
| acc_event_info data_event_info; |
| acc_api_info *api_info = thr->api_info; |
| |
| prof_info->event_type = acc_ev_alloc; |
| |
| data_event_info.data_event.event_type = prof_info->event_type; |
| data_event_info.data_event.valid_bytes |
| = _ACC_DATA_EVENT_INFO_VALID_BYTES; |
| data_event_info.data_event.parent_construct |
| = acc_construct_parallel; |
| data_event_info.data_event.implicit = 1; |
| data_event_info.data_event.tool_info = NULL; |
| data_event_info.data_event.var_name = NULL; |
| data_event_info.data_event.bytes = size; |
| data_event_info.data_event.host_ptr = NULL; |
| data_event_info.data_event.device_ptr = (void *) ptr; |
| |
| api_info->device_api = acc_device_api_other; |
| |
| GOMP_PLUGIN_goacc_profiling_dispatch (prof_info, &data_event_info, |
| api_info); |
| } |
| |
| return ptr; |
| } |
| |
| /* Create kernel dispatch data structure for given KERNEL, along with |
| the necessary device signals and memory allocations. */ |
| |
| static struct kernel_dispatch * |
| create_kernel_dispatch (struct kernel_info *kernel, int num_teams) |
| { |
| struct agent_info *agent = kernel->agent; |
| struct kernel_dispatch *shadow |
| = GOMP_PLUGIN_malloc_cleared (sizeof (struct kernel_dispatch)); |
| |
| shadow->agent = kernel->agent; |
| shadow->object = kernel->object; |
| |
| hsa_signal_t sync_signal; |
| hsa_status_t status = hsa_fns.hsa_signal_create_fn (1, 0, NULL, &sync_signal); |
| if (status != HSA_STATUS_SUCCESS) |
| hsa_fatal ("Error creating the GCN sync signal", status); |
| |
| shadow->signal = sync_signal.handle; |
| shadow->private_segment_size = kernel->private_segment_size; |
| shadow->group_segment_size = kernel->group_segment_size; |
| |
| /* We expect kernels to request a single pointer, explicitly, and the |
| rest of struct kernargs, implicitly. If they request anything else |
| then something is wrong. */ |
| if (kernel->kernarg_segment_size > 8) |
| { |
| GOMP_PLUGIN_fatal ("Unexpectedly large kernargs segment requested"); |
| return NULL; |
| } |
| |
| status = hsa_fns.hsa_memory_allocate_fn (agent->kernarg_region, |
| sizeof (struct kernargs), |
| &shadow->kernarg_address); |
| if (status != HSA_STATUS_SUCCESS) |
| hsa_fatal ("Could not allocate memory for GCN kernel arguments", status); |
| struct kernargs *kernargs = shadow->kernarg_address; |
| |
| /* Zero-initialize the output_data (minimum needed). */ |
| kernargs->out_ptr = (int64_t)&kernargs->output_data; |
| kernargs->output_data.next_output = 0; |
| for (unsigned i = 0; |
| i < (sizeof (kernargs->output_data.queue) |
| / sizeof (kernargs->output_data.queue[0])); |
| i++) |
| kernargs->output_data.queue[i].written = 0; |
| kernargs->output_data.consumed = 0; |
| |
| /* Pass in the heap location. */ |
| kernargs->heap_ptr = (int64_t)kernel->module->heap; |
| |
| /* Create an arena. */ |
| if (kernel->kind == KIND_OPENMP) |
| kernargs->arena_ptr = (int64_t)get_team_arena (agent, num_teams); |
| else |
| kernargs->arena_ptr = 0; |
| |
| /* Ensure we can recognize unset return values. */ |
| kernargs->output_data.return_value = 0xcafe0000; |
| |
| return shadow; |
| } |
| |
| /* Output any data written to console output from the kernel. It is expected |
| that this function is polled during kernel execution. |
| |
| We print all entries from the last item printed to the next entry without |
| a "written" flag. If the "final" flag is set then it'll continue right to |
| the end. |
| |
| The print buffer is circular, but the from and to locations don't wrap when |
| the buffer does, so the output limit is UINT_MAX. The target blocks on |
| output when the buffer is full. */ |
| |
| static void |
| console_output (struct kernel_info *kernel, struct kernargs *kernargs, |
| bool final) |
| { |
| unsigned int limit = (sizeof (kernargs->output_data.queue) |
| / sizeof (kernargs->output_data.queue[0])); |
| |
| unsigned int from = __atomic_load_n (&kernargs->output_data.consumed, |
| __ATOMIC_ACQUIRE); |
| unsigned int to = kernargs->output_data.next_output; |
| |
| if (from > to) |
| { |
| /* Overflow. */ |
| if (final) |
| printf ("GCN print buffer overflowed.\n"); |
| return; |
| } |
| |
| unsigned int i; |
| for (i = from; i < to; i++) |
| { |
| struct printf_data *data = &kernargs->output_data.queue[i%limit]; |
| |
| if (!data->written && !final) |
| break; |
| |
| switch (data->type) |
| { |
| case 0: printf ("%.128s%ld\n", data->msg, data->ivalue); break; |
| case 1: printf ("%.128s%f\n", data->msg, data->dvalue); break; |
| case 2: printf ("%.128s%.128s\n", data->msg, data->text); break; |
| case 3: printf ("%.128s%.128s", data->msg, data->text); break; |
| default: printf ("GCN print buffer error!\n"); break; |
| } |
| data->written = 0; |
| __atomic_store_n (&kernargs->output_data.consumed, i+1, |
| __ATOMIC_RELEASE); |
| } |
| fflush (stdout); |
| } |
| |
| /* Release data structure created for a kernel dispatch in SHADOW argument, |
| and clean up the signal and memory allocations. */ |
| |
| static void |
| release_kernel_dispatch (struct kernel_dispatch *shadow) |
| { |
| GCN_DEBUG ("Released kernel dispatch: %p\n", shadow); |
| |
| struct kernargs *kernargs = shadow->kernarg_address; |
| void *arena = (void *)kernargs->arena_ptr; |
| if (arena) |
| release_team_arena (shadow->agent, arena); |
| |
| hsa_fns.hsa_memory_free_fn (shadow->kernarg_address); |
| |
| hsa_signal_t s; |
| s.handle = shadow->signal; |
| hsa_fns.hsa_signal_destroy_fn (s); |
| |
| free (shadow); |
| } |
| |
| /* Extract the properties from a kernel binary. */ |
| |
| static void |
| init_kernel_properties (struct kernel_info *kernel) |
| { |
| hsa_status_t status; |
| struct agent_info *agent = kernel->agent; |
| hsa_executable_symbol_t kernel_symbol; |
| char *buf = alloca (strlen (kernel->name) + 4); |
| sprintf (buf, "%s.kd", kernel->name); |
| status = hsa_fns.hsa_executable_get_symbol_fn (agent->executable, NULL, |
| buf, agent->id, |
| 0, &kernel_symbol); |
| if (status != HSA_STATUS_SUCCESS) |
| { |
| hsa_warn ("Could not find symbol for kernel in the code object", status); |
| fprintf (stderr, "not found name: '%s'\n", buf); |
| dump_executable_symbols (agent->executable); |
| goto failure; |
| } |
| GCN_DEBUG ("Located kernel %s\n", kernel->name); |
| status = hsa_fns.hsa_executable_symbol_get_info_fn |
| (kernel_symbol, HSA_EXECUTABLE_SYMBOL_INFO_KERNEL_OBJECT, &kernel->object); |
| if (status != HSA_STATUS_SUCCESS) |
| hsa_fatal ("Could not extract a kernel object from its symbol", status); |
| status = hsa_fns.hsa_executable_symbol_get_info_fn |
| (kernel_symbol, HSA_EXECUTABLE_SYMBOL_INFO_KERNEL_KERNARG_SEGMENT_SIZE, |
| &kernel->kernarg_segment_size); |
| if (status != HSA_STATUS_SUCCESS) |
| hsa_fatal ("Could not get info about kernel argument size", status); |
| status = hsa_fns.hsa_executable_symbol_get_info_fn |
| (kernel_symbol, HSA_EXECUTABLE_SYMBOL_INFO_KERNEL_GROUP_SEGMENT_SIZE, |
| &kernel->group_segment_size); |
| if (status != HSA_STATUS_SUCCESS) |
| hsa_fatal ("Could not get info about kernel group segment size", status); |
| status = hsa_fns.hsa_executable_symbol_get_info_fn |
| (kernel_symbol, HSA_EXECUTABLE_SYMBOL_INFO_KERNEL_PRIVATE_SEGMENT_SIZE, |
| &kernel->private_segment_size); |
| if (status != HSA_STATUS_SUCCESS) |
| hsa_fatal ("Could not get info about kernel private segment size", |
| status); |
| |
| /* The kernel type is not known until something tries to launch it. */ |
| kernel->kind = KIND_UNKNOWN; |
| |
| GCN_DEBUG ("Kernel structure for %s fully initialized with " |
| "following segment sizes: \n", kernel->name); |
| GCN_DEBUG (" group_segment_size: %u\n", |
| (unsigned) kernel->group_segment_size); |
| GCN_DEBUG (" private_segment_size: %u\n", |
| (unsigned) kernel->private_segment_size); |
| GCN_DEBUG (" kernarg_segment_size: %u\n", |
| (unsigned) kernel->kernarg_segment_size); |
| return; |
| |
| failure: |
| kernel->initialization_failed = true; |
| } |
| |
| /* Do all the work that is necessary before running KERNEL for the first time. |
| The function assumes the program has been created, finalized and frozen by |
| create_and_finalize_hsa_program. */ |
| |
| static void |
| init_kernel (struct kernel_info *kernel) |
| { |
| if (pthread_mutex_lock (&kernel->init_mutex)) |
| GOMP_PLUGIN_fatal ("Could not lock a GCN kernel initialization mutex"); |
| if (kernel->initialized) |
| { |
| if (pthread_mutex_unlock (&kernel->init_mutex)) |
| GOMP_PLUGIN_fatal ("Could not unlock a GCN kernel initialization " |
| "mutex"); |
| |
| return; |
| } |
| |
| init_kernel_properties (kernel); |
| |
| if (!kernel->initialization_failed) |
| { |
| GCN_DEBUG ("\n"); |
| |
| kernel->initialized = true; |
| } |
| if (pthread_mutex_unlock (&kernel->init_mutex)) |
| GOMP_PLUGIN_fatal ("Could not unlock a GCN kernel initialization " |
| "mutex"); |
| } |
| |
| /* Run KERNEL on its agent, pass VARS to it as arguments and take |
| launch attributes from KLA. |
| |
| MODULE_LOCKED indicates that the caller already holds the lock and |
| run_kernel need not lock it again. |
| If AQ is NULL then agent->sync_queue will be used. */ |
| |
| static void |
| run_kernel (struct kernel_info *kernel, void *vars, |
| struct GOMP_kernel_launch_attributes *kla, |
| struct goacc_asyncqueue *aq, bool module_locked) |
| { |
| GCN_DEBUG ("SGPRs: %d, VGPRs: %d\n", kernel->description->sgpr_count, |
| kernel->description->vpgr_count); |
| |
| /* Reduce the number of threads/workers if there are insufficient |
| VGPRs available to run the kernels together. */ |
| if (kla->ndim == 3 && kernel->description->vpgr_count > 0) |
| { |
| int granulated_vgprs = (kernel->description->vpgr_count + 3) & ~3; |
| int max_threads = (256 / granulated_vgprs) * 4; |
| if (kla->gdims[2] > max_threads) |
| { |
| GCN_WARNING ("Too many VGPRs required to support %d threads/workers" |
| " per team/gang - reducing to %d threads/workers.\n", |
| kla->gdims[2], max_threads); |
| kla->gdims[2] = max_threads; |
| } |
| } |
| |
| GCN_DEBUG ("GCN launch on queue: %d:%d\n", kernel->agent->device_id, |
| (aq ? aq->id : 0)); |
| GCN_DEBUG ("GCN launch attribs: gdims:["); |
| int i; |
| for (i = 0; i < kla->ndim; ++i) |
| { |
| if (i) |
| DEBUG_PRINT (", "); |
| DEBUG_PRINT ("%u", kla->gdims[i]); |
| } |
| DEBUG_PRINT ("], normalized gdims:["); |
| for (i = 0; i < kla->ndim; ++i) |
| { |
| if (i) |
| DEBUG_PRINT (", "); |
| DEBUG_PRINT ("%u", kla->gdims[i] / kla->wdims[i]); |
| } |
| DEBUG_PRINT ("], wdims:["); |
| for (i = 0; i < kla->ndim; ++i) |
| { |
| if (i) |
| DEBUG_PRINT (", "); |
| DEBUG_PRINT ("%u", kla->wdims[i]); |
| } |
| DEBUG_PRINT ("]\n"); |
| DEBUG_FLUSH (); |
| |
| struct agent_info *agent = kernel->agent; |
| if (!module_locked && pthread_rwlock_rdlock (&agent->module_rwlock)) |
| GOMP_PLUGIN_fatal ("Unable to read-lock a GCN agent rwlock"); |
| |
| if (!agent->initialized) |
| GOMP_PLUGIN_fatal ("Agent must be initialized"); |
| |
| if (!kernel->initialized) |
| GOMP_PLUGIN_fatal ("Called kernel must be initialized"); |
| |
| hsa_queue_t *command_q = (aq ? aq->hsa_queue : kernel->agent->sync_queue); |
| |
| uint64_t index |
| = hsa_fns.hsa_queue_add_write_index_release_fn (command_q, 1); |
| GCN_DEBUG ("Got AQL index %llu\n", (long long int) index); |
| |
| /* Wait until the queue is not full before writing the packet. */ |
| while (index - hsa_fns.hsa_queue_load_read_index_acquire_fn (command_q) |
| >= command_q->size) |
| ; |
| |
| /* Do not allow the dimensions to be overridden when running |
| constructors or destructors. */ |
| int override_x = kernel->kind == KIND_UNKNOWN ? 0 : override_x_dim; |
| int override_z = kernel->kind == KIND_UNKNOWN ? 0 : override_z_dim; |
| |
| hsa_kernel_dispatch_packet_t *packet; |
| packet = ((hsa_kernel_dispatch_packet_t *) command_q->base_address) |
| + index % command_q->size; |
| |
| memset (((uint8_t *) packet) + 4, 0, sizeof (*packet) - 4); |
| packet->grid_size_x = override_x ? : kla->gdims[0]; |
| packet->workgroup_size_x = get_group_size (kla->ndim, |
| packet->grid_size_x, |
| kla->wdims[0]); |
| |
| if (kla->ndim >= 2) |
| { |
| packet->grid_size_y = kla->gdims[1]; |
| packet->workgroup_size_y = get_group_size (kla->ndim, kla->gdims[1], |
| kla->wdims[1]); |
| } |
| else |
| { |
| packet->grid_size_y = 1; |
| packet->workgroup_size_y = 1; |
| } |
| |
| if (kla->ndim == 3) |
| { |
| packet->grid_size_z = limit_worker_threads (override_z |
| ? : kla->gdims[2]); |
| packet->workgroup_size_z = get_group_size (kla->ndim, |
| packet->grid_size_z, |
| kla->wdims[2]); |
| } |
| else |
| { |
| packet->grid_size_z = 1; |
| packet->workgroup_size_z = 1; |
| } |
| |
| GCN_DEBUG ("GCN launch actuals: grid:[%u, %u, %u]," |
| " normalized grid:[%u, %u, %u], workgroup:[%u, %u, %u]\n", |
| packet->grid_size_x, packet->grid_size_y, packet->grid_size_z, |
| packet->grid_size_x / packet->workgroup_size_x, |
| packet->grid_size_y / packet->workgroup_size_y, |
| packet->grid_size_z / packet->workgroup_size_z, |
| packet->workgroup_size_x, packet->workgroup_size_y, |
| packet->workgroup_size_z); |
| |
| struct kernel_dispatch *shadow |
| = create_kernel_dispatch (kernel, packet->grid_size_x); |
| shadow->queue = command_q; |
| |
| if (debug) |
| { |
| fprintf (stderr, "\nKernel has following dependencies:\n"); |
| print_kernel_dispatch (shadow, 2); |
| } |
| |
| packet->private_segment_size = kernel->private_segment_size; |
| packet->group_segment_size = kernel->group_segment_size; |
| packet->kernel_object = kernel->object; |
| packet->kernarg_address = shadow->kernarg_address; |
| hsa_signal_t s; |
| s.handle = shadow->signal; |
| packet->completion_signal = s; |
| hsa_fns.hsa_signal_store_relaxed_fn (s, 1); |
| memcpy (shadow->kernarg_address, &vars, sizeof (vars)); |
| |
| GCN_DEBUG ("Copying kernel runtime pointer to kernarg_address\n"); |
| |
| uint16_t header; |
| header = HSA_PACKET_TYPE_KERNEL_DISPATCH << HSA_PACKET_HEADER_TYPE; |
| header |= HSA_FENCE_SCOPE_SYSTEM << HSA_PACKET_HEADER_ACQUIRE_FENCE_SCOPE; |
| header |= HSA_FENCE_SCOPE_SYSTEM << HSA_PACKET_HEADER_RELEASE_FENCE_SCOPE; |
| |
| GCN_DEBUG ("Going to dispatch kernel %s on device %d\n", kernel->name, |
| agent->device_id); |
| |
| packet_store_release ((uint32_t *) packet, header, |
| (uint16_t) kla->ndim |
| << HSA_KERNEL_DISPATCH_PACKET_SETUP_DIMENSIONS); |
| |
| hsa_fns.hsa_signal_store_release_fn (command_q->doorbell_signal, |
| index); |
| |
| GCN_DEBUG ("Kernel dispatched, waiting for completion\n"); |
| |
| /* Root signal waits with 1ms timeout. */ |
| while (hsa_fns.hsa_signal_wait_acquire_fn (s, HSA_SIGNAL_CONDITION_LT, 1, |
| 1000 * 1000, |
| HSA_WAIT_STATE_BLOCKED) != 0) |
| { |
| console_output (kernel, shadow->kernarg_address, false); |
| } |
| console_output (kernel, shadow->kernarg_address, true); |
| |
| struct kernargs *kernargs = shadow->kernarg_address; |
| unsigned int return_value = (unsigned int)kernargs->output_data.return_value; |
| |
| release_kernel_dispatch (shadow); |
| |
| if (!module_locked && pthread_rwlock_unlock (&agent->module_rwlock)) |
| GOMP_PLUGIN_fatal ("Unable to unlock a GCN agent rwlock"); |
| |
| unsigned int upper = (return_value & ~0xffff) >> 16; |
| if (upper == 0xcafe) |
| ; // exit not called, normal termination. |
| else if (upper == 0xffff) |
| ; // exit called. |
| else |
| { |
| GOMP_PLUGIN_error ("Possible kernel exit value corruption, 2 most" |
| " significant bytes aren't 0xffff or 0xcafe: 0x%x\n", |
| return_value); |
| abort (); |
| } |
| |
| if (upper == 0xffff) |
| { |
| unsigned int signal = (return_value >> 8) & 0xff; |
| |
| if (signal == SIGABRT) |
| { |
| GCN_WARNING ("GCN Kernel aborted\n"); |
| abort (); |
| } |
| else if (signal != 0) |
| { |
| GCN_WARNING ("GCN Kernel received unknown signal\n"); |
| abort (); |
| } |
| |
| GCN_DEBUG ("GCN Kernel exited with value: %d\n", return_value & 0xff); |
| exit (return_value & 0xff); |
| } |
| } |
| |
| /* }}} */ |
| /* {{{ Load/Unload */ |
| |
| /* Initialize KERNEL from D and other parameters. Return true on success. */ |
| |
| static bool |
| init_basic_kernel_info (struct kernel_info *kernel, |
| struct hsa_kernel_description *d, |
| struct agent_info *agent, |
| struct module_info *module) |
| { |
| kernel->agent = agent; |
| kernel->module = module; |
| kernel->name = d->name; |
| kernel->description = d; |
| if (pthread_mutex_init (&kernel->init_mutex, NULL)) |
| { |
| GOMP_PLUGIN_error ("Failed to initialize a GCN kernel mutex"); |
| return false; |
| } |
| return true; |
| } |
| |
| /* Check that the GCN ISA of the given image matches the ISA of the agent. */ |
| |
| static bool |
| isa_matches_agent (struct agent_info *agent, Elf64_Ehdr *image) |
| { |
| int isa_field = elf_gcn_isa_field (image); |
| const char* isa_s = isa_hsa_name (isa_field); |
| if (!isa_s) |
| { |
| hsa_error ("Unsupported ISA in GCN code object.", HSA_STATUS_ERROR); |
| return false; |
| } |
| |
| if (isa_field != agent->device_isa) |
| { |
| char msg[120]; |
| const char *agent_isa_s = isa_hsa_name (agent->device_isa); |
| const char *agent_isa_gcc_s = isa_gcc_name (agent->device_isa); |
| assert (agent_isa_s); |
| assert (agent_isa_gcc_s); |
| |
| snprintf (msg, sizeof msg, |
| "GCN code object ISA '%s' does not match GPU ISA '%s'.\n" |
| "Try to recompile with '-foffload=-march=%s'.\n", |
| isa_s, agent_isa_s, agent_isa_gcc_s); |
| |
| hsa_error (msg, HSA_STATUS_ERROR); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /* Create and finalize the program consisting of all loaded modules. */ |
| |
| static bool |
| create_and_finalize_hsa_program (struct agent_info *agent) |
| { |
| hsa_status_t status; |
| bool res = true; |
| if (pthread_mutex_lock (&agent->prog_mutex)) |
| { |
| GOMP_PLUGIN_error ("Could not lock a GCN agent program mutex"); |
| return false; |
| } |
| if (agent->prog_finalized) |
| goto final; |
| |
| status |
| = hsa_fns.hsa_executable_create_fn (HSA_PROFILE_FULL, |
| HSA_EXECUTABLE_STATE_UNFROZEN, |
| "", &agent->executable); |
| if (status != HSA_STATUS_SUCCESS) |
| { |
| hsa_error ("Could not create GCN executable", status); |
| goto fail; |
| } |
| |
| /* Load any GCN modules. */ |
| struct module_info *module = agent->module; |
| if (module) |
| { |
| Elf64_Ehdr *image = (Elf64_Ehdr *)module->image_desc->gcn_image->image; |
| |
| if (!isa_matches_agent (agent, image)) |
| goto fail; |
| |
| hsa_code_object_t co = { 0 }; |
| status = hsa_fns.hsa_code_object_deserialize_fn |
| (module->image_desc->gcn_image->image, |
| module->image_desc->gcn_image->size, |
| NULL, &co); |
| if (status != HSA_STATUS_SUCCESS) |
| { |
| hsa_error ("Could not deserialize GCN code object", status); |
| goto fail; |
| } |
| |
| status = hsa_fns.hsa_executable_load_code_object_fn |
| (agent->executable, agent->id, co, ""); |
| if (status != HSA_STATUS_SUCCESS) |
| { |
| hsa_error ("Could not load GCN code object", status); |
| goto fail; |
| } |
| |
| if (!module->heap) |
| { |
| status = hsa_fns.hsa_memory_allocate_fn (agent->data_region, |
| gcn_kernel_heap_size, |
| (void**)&module->heap); |
| if (status != HSA_STATUS_SUCCESS) |
| { |
| hsa_error ("Could not allocate memory for GCN heap", status); |
| goto fail; |
| } |
| |
| status = hsa_fns.hsa_memory_assign_agent_fn |
| (module->heap, agent->id, HSA_ACCESS_PERMISSION_RW); |
| if (status != HSA_STATUS_SUCCESS) |
| { |
| hsa_error ("Could not assign GCN heap memory to device", status); |
| goto fail; |
| } |
| |
| hsa_fns.hsa_memory_copy_fn (&module->heap->size, |
| &gcn_kernel_heap_size, |
| sizeof (gcn_kernel_heap_size)); |
| } |
| |
| } |
| |
| if (debug) |
| dump_executable_symbols (agent->executable); |
| |
| status = hsa_fns.hsa_executable_freeze_fn (agent->executable, ""); |
| if (status != HSA_STATUS_SUCCESS) |
| { |
| hsa_error ("Could not freeze the GCN executable", status); |
| goto fail; |
| } |
| |
| final: |
| agent->prog_finalized = true; |
| |
| if (pthread_mutex_unlock (&agent->prog_mutex)) |
| { |
| GOMP_PLUGIN_error ("Could not unlock a GCN agent program mutex"); |
| res = false; |
| } |
| |
| return res; |
| |
| fail: |
| res = false; |
| goto final; |
| } |
| |
| /* Free the HSA program in agent and everything associated with it and set |
| agent->prog_finalized and the initialized flags of all kernels to false. |
| Return TRUE on success. */ |
| |
| static bool |
| destroy_hsa_program (struct agent_info *agent) |
| { |
| if (!agent->prog_finalized) |
| return true; |
| |
| hsa_status_t status; |
| |
| GCN_DEBUG ("Destroying the current GCN program.\n"); |
| |
| status = hsa_fns.hsa_executable_destroy_fn (agent->executable); |
| if (status != HSA_STATUS_SUCCESS) |
| return hsa_error ("Could not destroy GCN executable", status); |
| |
| if (agent->module) |
| { |
| int i; |
| for (i = 0; i < agent->module->kernel_count; i++) |
| agent->module->kernels[i].initialized = false; |
| |
| if (agent->module->heap) |
| { |
| hsa_fns.hsa_memory_free_fn (agent->module->heap); |
| agent->module->heap = NULL; |
| } |
| } |
| agent->prog_finalized = false; |
| return true; |
| } |
| |
| /* Deinitialize all information associated with MODULE and kernels within |
| it. Return TRUE on success. */ |
| |
| static bool |
| destroy_module (struct module_info *module, bool locked) |
| { |
| /* Run destructors before destroying module. */ |
| struct GOMP_kernel_launch_attributes kla = |
| { 3, |
| /* Grid size. */ |
| { 1, 64, 1 }, |
| /* Work-group size. */ |
| { 1, 64, 1 } |
| }; |
| |
| if (module->fini_array_func) |
| { |
| init_kernel (module->fini_array_func); |
| run_kernel (module->fini_array_func, NULL, &kla, NULL, locked); |
| } |
| module->constructors_run_p = false; |
| |
| int i; |
| for (i = 0; i < module->kernel_count; i++) |
| if (pthread_mutex_destroy (&module->kernels[i].init_mutex)) |
| { |
| GOMP_PLUGIN_error ("Failed to destroy a GCN kernel initialization " |
| "mutex"); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /* }}} */ |
| /* {{{ Async */ |
| |
| /* Callback of dispatch queues to report errors. */ |
| |
| static void |
| execute_queue_entry (struct goacc_asyncqueue *aq, int index) |
| { |
| struct queue_entry *entry = &aq->queue[index]; |
| |
| switch (entry->type) |
| { |
| case KERNEL_LAUNCH: |
| if (DEBUG_QUEUES) |
| GCN_DEBUG ("Async thread %d:%d: Executing launch entry (%d)\n", |
| aq->agent->device_id, aq->id, index); |
| run_kernel (entry->u.launch.kernel, |
| entry->u.launch.vars, |
| &entry->u.launch.kla, aq, false); |
| if (DEBUG_QUEUES) |
| GCN_DEBUG ("Async thread %d:%d: Executing launch entry (%d) done\n", |
| aq->agent->device_id, aq->id, index); |
| break; |
| |
| case CALLBACK: |
| if (DEBUG_QUEUES) |
| GCN_DEBUG ("Async thread %d:%d: Executing callback entry (%d)\n", |
| aq->agent->device_id, aq->id, index); |
| entry->u.callback.fn (entry->u.callback.data); |
| if (DEBUG_QUEUES) |
| GCN_DEBUG ("Async thread %d:%d: Executing callback entry (%d) done\n", |
| aq->agent->device_id, aq->id, index); |
| break; |
| |
| case ASYNC_WAIT: |
| { |
| /* FIXME: is it safe to access a placeholder that may already have |
| been executed? */ |
| struct placeholder *placeholderp = entry->u.asyncwait.placeholderp; |
| |
| if (DEBUG_QUEUES) |
| GCN_DEBUG ("Async thread %d:%d: Executing async wait entry (%d)\n", |
| aq->agent->device_id, aq->id, index); |
| |
| pthread_mutex_lock (&placeholderp->mutex); |
| |
| while (!placeholderp->executed) |
| pthread_cond_wait (&placeholderp->cond, &placeholderp->mutex); |
| |
| pthread_mutex_unlock (&placeholderp->mutex); |
| |
| if (pthread_cond_destroy (&placeholderp->cond)) |
| GOMP_PLUGIN_error ("Failed to destroy serialization cond"); |
| |
| if (pthread_mutex_destroy (&placeholderp->mutex)) |
| GOMP_PLUGIN_error ("Failed to destroy serialization mutex"); |
| |
| if (DEBUG_QUEUES) |
| GCN_DEBUG ("Async thread %d:%d: Executing async wait " |
| "entry (%d) done\n", aq->agent->device_id, aq->id, index); |
| } |
| break; |
| |
| case ASYNC_PLACEHOLDER: |
| pthread_mutex_lock (&entry->u.placeholder.mutex); |
| entry->u.placeholder.executed = 1; |
| pthread_cond_signal (&entry->u.placeholder.cond); |
| pthread_mutex_unlock (&entry->u.placeholder.mutex); |
| break; |
| |
| default: |
| GOMP_PLUGIN_fatal ("Unknown queue element"); |
| } |
| } |
| |
| /* This function is run as a thread to service an async queue in the |
| background. It runs continuously until the stop flag is set. */ |
| |
| static void * |
| drain_queue (void *thread_arg) |
| { |
| struct goacc_asyncqueue *aq = thread_arg; |
| |
| if (DRAIN_QUEUE_SYNCHRONOUS_P) |
| { |
| aq->drain_queue_stop = 2; |
| return NULL; |
| } |
| |
| pthread_mutex_lock (&aq->mutex); |
| |
| while (true) |
| { |
| if (aq->drain_queue_stop) |
| break; |
| |
| if (aq->queue_n > 0) |
| { |
| pthread_mutex_unlock (&aq->mutex); |
| execute_queue_entry (aq, aq->queue_first); |
| |
| pthread_mutex_lock (&aq->mutex); |
| aq->queue_first = ((aq->queue_first + 1) |
| % ASYNC_QUEUE_SIZE); |
| aq->queue_n--; |
| |
| if (DEBUG_THREAD_SIGNAL) |
| GCN_DEBUG ("Async thread %d:%d: broadcasting queue out update\n", |
| aq->agent->device_id, aq->id); |
| pthread_cond_broadcast (&aq->queue_cond_out); |
| pthread_mutex_unlock (&aq->mutex); |
| |
| if (DEBUG_QUEUES) |
| GCN_DEBUG ("Async thread %d:%d: continue\n", aq->agent->device_id, |
| aq->id); |
| pthread_mutex_lock (&aq->mutex); |
| } |
| else |
| { |
| if (DEBUG_THREAD_SLEEP) |
| GCN_DEBUG ("Async thread %d:%d: going to sleep\n", |
| aq->agent->device_id, aq->id); |
| pthread_cond_wait (&aq->queue_cond_in, &aq->mutex); |
| if (DEBUG_THREAD_SLEEP) |
| GCN_DEBUG ("Async thread %d:%d: woke up, rechecking\n", |
| aq->agent->device_id, aq->id); |
| } |
| } |
| |
| aq->drain_queue_stop = 2; |
| if (DEBUG_THREAD_SIGNAL) |
| GCN_DEBUG ("Async thread %d:%d: broadcasting last queue out update\n", |
| aq->agent->device_id, aq->id); |
| pthread_cond_broadcast (&aq->queue_cond_out); |
| pthread_mutex_unlock (&aq->mutex); |
| |
| GCN_DEBUG ("Async thread %d:%d: returning\n", aq->agent->device_id, aq->id); |
| return NULL; |
| } |
| |
| /* This function is used only when DRAIN_QUEUE_SYNCHRONOUS_P is set, which |
| is not usually the case. This is just a debug tool. */ |
| |
| static void |
| drain_queue_synchronous (struct goacc_asyncqueue *aq) |
| { |
| pthread_mutex_lock (&aq->mutex); |
| |
| while (aq->queue_n > 0) |
| { |
| execute_queue_entry (aq, aq->queue_first); |
| |
| aq->queue_first = ((aq->queue_first + 1) |
| % ASYNC_QUEUE_SIZE); |
| aq->queue_n--; |
| } |
| |
| pthread_mutex_unlock (&aq->mutex); |
| } |
| |
| /* Block the current thread until an async queue is writable. The aq->mutex |
| lock should be held on entry, and remains locked on exit. */ |
| |
| static void |
| wait_for_queue_nonfull (struct goacc_asyncqueue *aq) |
| { |
| if (aq->queue_n == ASYNC_QUEUE_SIZE) |
| { |
| /* Queue is full. Wait for it to not be full. */ |
| while (aq->queue_n == ASYNC_QUEUE_SIZE) |
| pthread_cond_wait (&aq->queue_cond_out, &aq->mutex); |
| } |
| } |
| |
| /* Request an asynchronous kernel launch on the specified queue. This |
| may block if the queue is full, but returns without waiting for the |
| kernel to run. */ |
| |
| static void |
| queue_push_launch (struct goacc_asyncqueue *aq, struct kernel_info *kernel, |
| void *vars, struct GOMP_kernel_launch_attributes *kla) |
| { |
| assert (aq->agent == kernel->agent); |
| |
| pthread_mutex_lock (&aq->mutex); |
| |
| wait_for_queue_nonfull (aq); |
| |
| int queue_last = ((aq->queue_first + aq->queue_n) |
| % ASYNC_QUEUE_SIZE); |
| if (DEBUG_QUEUES) |
| GCN_DEBUG ("queue_push_launch %d:%d: at %i\n", aq->agent->device_id, |
| aq->id, queue_last); |
| |
| aq->queue[queue_last].type = KERNEL_LAUNCH; |
| aq->queue[queue_last].u.launch.kernel = kernel; |
| aq->queue[queue_last].u.launch.vars = vars; |
| aq->queue[queue_last].u.launch.kla = *kla; |
| |
| aq->queue_n++; |
| |
| if (DEBUG_THREAD_SIGNAL) |
| GCN_DEBUG ("signalling async thread %d:%d: cond_in\n", |
| aq->agent->device_id, aq->id); |
| pthread_cond_signal (&aq->queue_cond_in); |
| |
| pthread_mutex_unlock (&aq->mutex); |
| } |
| |
| /* Request an asynchronous callback on the specified queue. The callback |
| function will be called, with the given opaque data, from the appropriate |
| async thread, when all previous items on that queue are complete. */ |
| |
| static void |
| queue_push_callback (struct goacc_asyncqueue *aq, void (*fn)(void *), |
| void *data) |
| { |
| pthread_mutex_lock (&aq->mutex); |
| |
| wait_for_queue_nonfull (aq); |
| |
| int queue_last = ((aq->queue_first + aq->queue_n) |
| % ASYNC_QUEUE_SIZE); |
| if (DEBUG_QUEUES) |
| GCN_DEBUG ("queue_push_callback %d:%d: at %i\n", aq->agent->device_id, |
| aq->id, queue_last); |
| |
| aq->queue[queue_last].type = CALLBACK; |
| aq->queue[queue_last].u.callback.fn = fn; |
| aq->queue[queue_last].u.callback.data = data; |
| |
| aq->queue_n++; |
| |
| if (DEBUG_THREAD_SIGNAL) |
| GCN_DEBUG ("signalling async thread %d:%d: cond_in\n", |
| aq->agent->device_id, aq->id); |
| pthread_cond_signal (&aq->queue_cond_in); |
| |
| pthread_mutex_unlock (&aq->mutex); |
| } |
| |
| /* Request that a given async thread wait for another thread (unspecified) to |
| reach the given placeholder. The wait will occur when all previous entries |
| on the queue are complete. A placeholder is effectively a kind of signal |
| which simply sets a flag when encountered in a queue. */ |
| |
| static void |
| queue_push_asyncwait (struct goacc_asyncqueue *aq, |
| struct placeholder *placeholderp) |
| { |
| pthread_mutex_lock (&aq->mutex); |
| |
| wait_for_queue_nonfull (aq); |
| |
| int queue_last = ((aq->queue_first + aq->queue_n) % ASYNC_QUEUE_SIZE); |
| if (DEBUG_QUEUES) |
| GCN_DEBUG ("queue_push_asyncwait %d:%d: at %i\n", aq->agent->device_id, |
| aq->id, queue_last); |
| |
| aq->queue[queue_last].type = ASYNC_WAIT; |
| aq->queue[queue_last].u.asyncwait.placeholderp = placeholderp; |
| |
| aq->queue_n++; |
| |
| if (DEBUG_THREAD_SIGNAL) |
| GCN_DEBUG ("signalling async thread %d:%d: cond_in\n", |
| aq->agent->device_id, aq->id); |
| pthread_cond_signal (&aq->queue_cond_in); |
| |
| pthread_mutex_unlock (&aq->mutex); |
| } |
| |
| /* Add a placeholder into an async queue. When the async thread reaches the |
| placeholder it will set the "executed" flag to true and continue. |
| Another thread may be waiting on this thread reaching the placeholder. */ |
| |
| static struct placeholder * |
| queue_push_placeholder (struct goacc_asyncqueue *aq) |
| { |
| struct placeholder *placeholderp; |
| |
| pthread_mutex_lock (&aq->mutex); |
| |
| wait_for_queue_nonfull (aq); |
| |
| int queue_last = ((aq->queue_first + aq->queue_n) % ASYNC_QUEUE_SIZE); |
| if (DEBUG_QUEUES) |
| GCN_DEBUG ("queue_push_placeholder %d:%d: at %i\n", aq->agent->device_id, |
| aq->id, queue_last); |
| |
| aq->queue[queue_last].type = ASYNC_PLACEHOLDER; |
| placeholderp = &aq->queue[queue_last].u.placeholder; |
| |
| if (pthread_mutex_init (&placeholderp->mutex, NULL)) |
| { |
| pthread_mutex_unlock (&aq->mutex); |
| GOMP_PLUGIN_error ("Failed to initialize serialization mutex"); |
| } |
| |
| if (pthread_cond_init (&placeholderp->cond, NULL)) |
| { |
| pthread_mutex_unlock (&aq->mutex); |
| GOMP_PLUGIN_error ("Failed to initialize serialization cond"); |
| } |
| |
| placeholderp->executed = 0; |
| |
| aq->queue_n++; |
| |
| if (DEBUG_THREAD_SIGNAL) |
| GCN_DEBUG ("signalling async thread %d:%d: cond_in\n", |
| aq->agent->device_id, aq->id); |
| pthread_cond_signal (&aq->queue_cond_in); |
| |
| pthread_mutex_unlock (&aq->mutex); |
| |
| return placeholderp; |
| } |
| |
| /* Signal an asynchronous thread to terminate, and wait for it to do so. */ |
| |
| static void |
| finalize_async_thread (struct goacc_asyncqueue *aq) |
| { |
| pthread_mutex_lock (&aq->mutex); |
| if (aq->drain_queue_stop == 2) |
| { |
| pthread_mutex_unlock (&aq->mutex); |
| return; |
| } |
| |
| aq->drain_queue_stop = 1; |
| |
| if (DEBUG_THREAD_SIGNAL) |
| GCN_DEBUG ("Signalling async thread %d:%d: cond_in\n", |
| aq->agent->device_id, aq->id); |
| pthread_cond_signal (&aq->queue_cond_in); |
| |
| while (aq->drain_queue_stop != 2) |
| { |
| if (DEBUG_THREAD_SLEEP) |
| GCN_DEBUG ("Waiting for async thread %d:%d to finish, putting thread" |
| " to sleep\n", aq->agent->device_id, aq->id); |
| pthread_cond_wait (&aq->queue_cond_out, &aq->mutex); |
| if (DEBUG_THREAD_SLEEP) |
| GCN_DEBUG ("Waiting, woke up thread %d:%d. Rechecking\n", |
| aq->agent->device_id, aq->id); |
| } |
| |
| GCN_DEBUG ("Done waiting for async thread %d:%d\n", aq->agent->device_id, |
| aq->id); |
| pthread_mutex_unlock (&aq->mutex); |
| |
| int err = pthread_join (aq->thread_drain_queue, NULL); |
| if (err != 0) |
| GOMP_PLUGIN_fatal ("Join async thread %d:%d: failed: %s", |
| aq->agent->device_id, aq->id, strerror (err)); |
| GCN_DEBUG ("Joined with async thread %d:%d\n", aq->agent->device_id, aq->id); |
| } |
| |
| /* Set up an async queue for OpenMP. There will be only one. The |
| implementation simply uses an OpenACC async queue. |
| FIXME: is this thread-safe if two threads call this function? */ |
| |
| static void |
| maybe_init_omp_async (struct agent_info *agent) |
| { |
| if (!agent->omp_async_queue) |
| agent->omp_async_queue |
| = GOMP_OFFLOAD_openacc_async_construct (agent->device_id); |
| } |
| |
| /* A wrapper that works around an issue in the HSA runtime with host-to-device |
| copies from read-only pages. */ |
| |
| static void |
| hsa_memory_copy_wrapper (void *dst, const void *src, size_t len) |
| { |
| hsa_status_t status = hsa_fns.hsa_memory_copy_fn (dst, src, len); |
| |
| if (status == HSA_STATUS_SUCCESS) |
| return; |
| |
| /* It appears that the copy fails if the source data is in a read-only page. |
| We can't detect that easily, so try copying the data to a temporary buffer |
| and doing the copy again if we got an error above. */ |
| |
| GCN_WARNING ("Read-only data transfer bug workaround triggered for " |
| "[%p:+%d]\n", (void *) src, (int) len); |
| |
| void *src_copy = malloc (len); |
| memcpy (src_copy, src, len); |
| status = hsa_fns.hsa_memory_copy_fn (dst, (const void *) src_copy, len); |
| free (src_copy); |
| if (status != HSA_STATUS_SUCCESS) |
| GOMP_PLUGIN_error ("memory copy failed"); |
| } |
| |
| /* Copy data to or from a device. This is intended for use as an async |
| callback event. */ |
| |
| static void |
| copy_data (void *data_) |
| { |
| struct copy_data *data = (struct copy_data *)data_; |
| GCN_DEBUG ("Async thread %d:%d: Copying %zu bytes from (%p) to (%p)\n", |
| data->aq->agent->device_id, data->aq->id, data->len, data->src, |
| data->dst); |
| hsa_memory_copy_wrapper (data->dst, data->src, data->len); |
| free (data); |
| } |
| |
| /* Free device data. This is intended for use as an async callback event. */ |
| |
| static void |
| gomp_offload_free (void *ptr) |
| { |
| GCN_DEBUG ("Async thread ?:?: Freeing %p\n", ptr); |
| GOMP_OFFLOAD_free (0, ptr); |
| } |
| |
| /* Request an asynchronous data copy, to or from a device, on a given queue. |
| The event will be registered as a callback. */ |
| |
| static void |
| queue_push_copy (struct goacc_asyncqueue *aq, void *dst, const void *src, |
| size_t len) |
| { |
| if (DEBUG_QUEUES) |
| GCN_DEBUG ("queue_push_copy %d:%d: %zu bytes from (%p) to (%p)\n", |
| aq->agent->device_id, aq->id, len, src, dst); |
| struct copy_data *data |
| = (struct copy_data *)GOMP_PLUGIN_malloc (sizeof (struct copy_data)); |
| data->dst = dst; |
| data->src = src; |
| data->len = len; |
| data->aq = aq; |
| queue_push_callback (aq, copy_data, data); |
| } |
| |
| /* Return true if the given queue is currently empty. */ |
| |
| static int |
| queue_empty (struct goacc_asyncqueue *aq) |
| { |
| pthread_mutex_lock (&aq->mutex); |
| int res = aq->queue_n == 0 ? 1 : 0; |
| pthread_mutex_unlock (&aq->mutex); |
| |
| return res; |
| } |
| |
| /* Wait for a given queue to become empty. This implements an OpenACC wait |
| directive. */ |
| |
| static void |
| wait_queue (struct goacc_asyncqueue *aq) |
| { |
| if (DRAIN_QUEUE_SYNCHRONOUS_P) |
| { |
| drain_queue_synchronous (aq); |
| return; |
| } |
| |
| pthread_mutex_lock (&aq->mutex); |
| |
| while (aq->queue_n > 0) |
| { |
| if (DEBUG_THREAD_SLEEP) |
| GCN_DEBUG ("waiting for thread %d:%d, putting thread to sleep\n", |
| aq->agent->device_id, aq->id); |
| pthread_cond_wait (&aq->queue_cond_out, &aq->mutex); |
| if (DEBUG_THREAD_SLEEP) |
| GCN_DEBUG ("thread %d:%d woke up. Rechecking\n", aq->agent->device_id, |
| aq->id); |
| } |
| |
| pthread_mutex_unlock (&aq->mutex); |
| GCN_DEBUG ("waiting for thread %d:%d, done\n", aq->agent->device_id, aq->id); |
| } |
| |
| /* }}} */ |
| /* {{{ OpenACC support */ |
| |
| /* Execute an OpenACC kernel, synchronously or asynchronously. */ |
| |
| static void |
| gcn_exec (struct kernel_info *kernel, size_t mapnum, void **hostaddrs, |
| void **devaddrs, unsigned *dims, void *targ_mem_desc, bool async, |
| struct goacc_asyncqueue *aq) |
| { |
| if (!GOMP_OFFLOAD_can_run (kernel)) |
| GOMP_PLUGIN_fatal ("OpenACC host fallback unimplemented."); |
| |
| /* If we get here then this must be an OpenACC kernel. */ |
| kernel->kind = KIND_OPENACC; |
| |
| /* devaddrs must be double-indirect on the target. */ |
| void **ind_da = alloc_by_agent (kernel->agent, sizeof (void*) * mapnum); |
| for (size_t i = 0; i < mapnum; i++) |
| hsa_fns.hsa_memory_copy_fn (&ind_da[i], |
| devaddrs[i] ? &devaddrs[i] : &hostaddrs[i], |
| sizeof (void *)); |
| |
| struct hsa_kernel_description *hsa_kernel_desc = NULL; |
| for (unsigned i = 0; i < kernel->module->image_desc->kernel_count; i++) |
| { |
| struct hsa_kernel_description *d |
| = &kernel->module->image_desc->kernel_infos[i]; |
| if (d->name == kernel->name) |
| { |
| hsa_kernel_desc = d; |
| break; |
| } |
| } |
| |
| /* We may have statically-determined dimensions in |
| hsa_kernel_desc->oacc_dims[] or dimensions passed to this offload kernel |
| invocation at runtime in dims[]. We allow static dimensions to take |
| priority over dynamic dimensions when present (non-zero). */ |
| if (hsa_kernel_desc->oacc_dims[0] > 0) |
| dims[0] = hsa_kernel_desc->oacc_dims[0]; |
| if (hsa_kernel_desc->oacc_dims[1] > 0) |
| dims[1] = hsa_kernel_desc->oacc_dims[1]; |
| if (hsa_kernel_desc->oacc_dims[2] > 0) |
| dims[2] = hsa_kernel_desc->oacc_dims[2]; |
| |
| /* If any of the OpenACC dimensions remain 0 then we get to pick a number. |
| There isn't really a correct answer for this without a clue about the |
| problem size, so let's do a reasonable number of single-worker gangs. |
| 64 gangs matches a typical Fiji device. */ |
| |
| if (dims[0] == 0) dims[0] = get_cu_count (kernel->agent); /* Gangs. */ |
| if (dims[1] == 0) dims[1] = 16; /* Workers. */ |
| |
| /* The incoming dimensions are expressed in terms of gangs, workers, and |
| vectors. The HSA dimensions are expressed in terms of "work-items", |
| which means multiples of vector lanes. |
| |
| The "grid size" specifies the size of the problem space, and the |
| "work-group size" specifies how much of that we want a single compute |
| unit to chew on at once. |
| |
| The three dimensions do not really correspond to hardware, but the |
| important thing is that the HSA runtime will launch as many |
| work-groups as it takes to process the entire grid, and each |
| work-group will contain as many wave-fronts as it takes to process |
| the work-items in that group. |
| |
| Essentially, as long as we set the Y dimension to 64 (the number of |
| vector lanes in hardware), and the Z group size to the maximum (16), |
| then we will get the gangs (X) and workers (Z) launched as we expect. |
| |
| The reason for the apparent reversal of vector and worker dimension |
| order is to do with the way the run-time distributes work-items across |
| v1 and v2. */ |
| struct GOMP_kernel_launch_attributes kla = |
| {3, |
| /* Grid size. */ |
| {dims[0], 64, dims[1]}, |
| /* Work-group size. */ |
| {1, 64, 16} |
| }; |
| |
| struct goacc_thread *thr = GOMP_PLUGIN_goacc_thread (); |
| acc_prof_info *prof_info = thr->prof_info; |
| acc_event_info enqueue_launch_event_info; |
| acc_api_info *api_info = thr->api_info; |
| bool profiling_dispatch_p = __builtin_expect (prof_info != NULL, false); |
| if (profiling_dispatch_p) |
| { |
| prof_info->event_type = acc_ev_enqueue_launch_start; |
| |
| enqueue_launch_event_info.launch_event.event_type |
| = prof_info->event_type; |
| enqueue_launch_event_info.launch_event.valid_bytes |
| = _ACC_LAUNCH_EVENT_INFO_VALID_BYTES; |
| enqueue_launch_event_info.launch_event.parent_construct |
| = acc_construct_parallel; |
| enqueue_launch_event_info.launch_event.implicit = 1; |
| enqueue_launch_event_info.launch_event.tool_info = NULL; |
| enqueue_launch_event_info.launch_event.kernel_name |
| = (char *) kernel->name; |
| enqueue_launch_event_info.launch_event.num_gangs = kla.gdims[0]; |
| enqueue_launch_event_info.launch_event.num_workers = kla.gdims[2]; |
| enqueue_launch_event_info.launch_event.vector_length = kla.gdims[1]; |
| |
| api_info->device_api = acc_device_api_other; |
| |
| GOMP_PLUGIN_goacc_profiling_dispatch (prof_info, |
| &enqueue_launch_event_info, api_info); |
| } |
| |
| if (!async) |
| { |
| run_kernel (kernel, ind_da, &kla, NULL, false); |
| gomp_offload_free (ind_da); |
| } |
| else |
| { |
| queue_push_launch (aq, kernel, ind_da, &kla); |
| if (DEBUG_QUEUES) |
| GCN_DEBUG ("queue_push_callback %d:%d gomp_offload_free, %p\n", |
| aq->agent->device_id, aq->id, ind_da); |
| queue_push_callback (aq, gomp_offload_free, ind_da); |
| } |
| |
| if (profiling_dispatch_p) |
| { |
| prof_info->event_type = acc_ev_enqueue_launch_end; |
| enqueue_launch_event_info.launch_event.event_type = prof_info->event_type; |
| GOMP_PLUGIN_goacc_profiling_dispatch (prof_info, |
| &enqueue_launch_event_info, |
| api_info); |
| } |
| } |
| |
| /* }}} */ |
| /* {{{ Generic Plugin API */ |
| |
| /* Return the name of the accelerator, which is "gcn". */ |
| |
| const char * |
| GOMP_OFFLOAD_get_name (void) |
| { |
| return "gcn"; |
| } |
| |
| /* Return the specific capabilities the HSA accelerator have. */ |
| |
| unsigned int |
| GOMP_OFFLOAD_get_caps (void) |
| { |
| /* FIXME: Enable shared memory for APU, but not discrete GPU. */ |
| return /*GOMP_OFFLOAD_CAP_SHARED_MEM |*/ GOMP_OFFLOAD_CAP_OPENMP_400 |
| | GOMP_OFFLOAD_CAP_OPENACC_200; |
| } |
| |
| /* Identify as GCN accelerator. */ |
| |
| int |
| GOMP_OFFLOAD_get_type (void) |
| { |
| return OFFLOAD_TARGET_TYPE_GCN; |
| } |
| |
| /* Return the libgomp version number we're compatible with. There is |
| no requirement for cross-version compatibility. */ |
| |
| unsigned |
| GOMP_OFFLOAD_version (void) |
| { |
| return GOMP_VERSION; |
| } |
| |
| /* Return the number of GCN devices on the system. */ |
| |
| int |
| GOMP_OFFLOAD_get_num_devices (void) |
| { |
| if (!init_hsa_context ()) |
| return 0; |
| return hsa_context.agent_count; |
| } |
| |
| /* Initialize device (agent) number N so that it can be used for computation. |
| Return TRUE on success. */ |
| |
| bool |
| GOMP_OFFLOAD_init_device (int n) |
| { |
| if (!init_hsa_context ()) |
| return false; |
| if (n >= hsa_context.agent_count) |
| { |
| GOMP_PLUGIN_error ("Request to initialize non-existent GCN device %i", n); |
| return false; |
| } |
| struct agent_info *agent = &hsa_context.agents[n]; |
| |
| if (agent->initialized) |
| return true; |
| |
| agent->device_id = n; |
| |
| if (pthread_rwlock_init (&agent->module_rwlock, NULL)) |
| { |
| GOMP_PLUGIN_error ("Failed to initialize a GCN agent rwlock"); |
| return false; |
| } |
| if (pthread_mutex_init (&agent->prog_mutex, NULL)) |
| { |
| GOMP_PLUGIN_error ("Failed to initialize a GCN agent program mutex"); |
| return false; |
| } |
| if (pthread_mutex_init (&agent->async_queues_mutex, NULL)) |
| { |
| GOMP_PLUGIN_error ("Failed to initialize a GCN agent queue mutex"); |
| return false; |
| } |
| if (pthread_mutex_init (&agent->team_arena_write_lock, NULL)) |
| { |
| GOMP_PLUGIN_error ("Failed to initialize a GCN team arena write mutex"); |
| |