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gnu / binutils-gdb / 38c90362460000bac2efdbf06250821429777bb0 / . / sim / common / sim-profile.c
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/* Default profiling support.
Copyright (C) 1996-2021 Free Software Foundation, Inc.
Contributed by Cygnus Support.
This file is part of GDB, the GNU debugger.
This program 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 of the License, or
(at your option) any later version.
This program 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.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* This must come before any other includes. */
#include "defs.h"
#include "sim-main.h"
#include "sim-io.h"
#include "sim-options.h"
#include "sim-assert.h"
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#if !WITH_PROFILE_PC_P
static unsigned int _profile_stub;
# define PROFILE_PC_FREQ(p) _profile_stub
# define PROFILE_PC_NR_BUCKETS(p) _profile_stub
# define PROFILE_PC_SHIFT(p) _profile_stub
# define PROFILE_PC_START(p) _profile_stub
# define PROFILE_PC_END(p) _profile_stub
# define PROFILE_INSN_COUNT(p) &_profile_stub
#endif
#define COMMAS(n) sim_add_commas (comma_buf, sizeof (comma_buf), (n))
static MODULE_INIT_FN profile_init;
static MODULE_UNINSTALL_FN profile_uninstall;
static DECLARE_OPTION_HANDLER (profile_option_handler);
enum {
OPTION_PROFILE_INSN = OPTION_START,
OPTION_PROFILE_MEMORY,
OPTION_PROFILE_MODEL,
OPTION_PROFILE_FILE,
OPTION_PROFILE_CORE,
OPTION_PROFILE_CPU_FREQUENCY,
OPTION_PROFILE_PC,
OPTION_PROFILE_PC_RANGE,
OPTION_PROFILE_PC_GRANULARITY,
OPTION_PROFILE_RANGE,
OPTION_PROFILE_FUNCTION
};
static const OPTION profile_options[] = {
{ {"profile", optional_argument, NULL, 'p'},
'p', "on|off", "Perform profiling",
profile_option_handler, NULL },
{ {"profile-insn", optional_argument, NULL, OPTION_PROFILE_INSN},
'\0', "on|off", "Perform instruction profiling",
profile_option_handler, NULL },
{ {"profile-memory", optional_argument, NULL, OPTION_PROFILE_MEMORY},
'\0', "on|off", "Perform memory profiling",
profile_option_handler, NULL },
{ {"profile-core", optional_argument, NULL, OPTION_PROFILE_CORE},
'\0', "on|off", "Perform CORE profiling",
profile_option_handler, NULL },
{ {"profile-model", optional_argument, NULL, OPTION_PROFILE_MODEL},
'\0', "on|off", "Perform model profiling",
profile_option_handler, NULL },
{ {"profile-cpu-frequency", required_argument, NULL,
OPTION_PROFILE_CPU_FREQUENCY},
'\0', "CPU FREQUENCY", "Specify the speed of the simulated cpu clock",
profile_option_handler, NULL },
{ {"profile-file", required_argument, NULL, OPTION_PROFILE_FILE},
'\0', "FILE NAME", "Specify profile output file",
profile_option_handler, NULL },
{ {"profile-pc", optional_argument, NULL, OPTION_PROFILE_PC},
'\0', "on|off", "Perform PC profiling",
profile_option_handler, NULL },
{ {"profile-pc-frequency", required_argument, NULL, 'F'},
'F', "PC PROFILE FREQUENCY", "Specified PC profiling frequency",
profile_option_handler, NULL },
{ {"profile-pc-size", required_argument, NULL, 'S'},
'S', "PC PROFILE SIZE", "Specify PC profiling size",
profile_option_handler, NULL },
{ {"profile-pc-granularity", required_argument, NULL, OPTION_PROFILE_PC_GRANULARITY},
'\0', "PC PROFILE GRANULARITY", "Specify PC profiling sample coverage",
profile_option_handler, NULL },
{ {"profile-pc-range", required_argument, NULL, OPTION_PROFILE_PC_RANGE},
'\0', "BASE,BOUND", "Specify PC profiling address range",
profile_option_handler, NULL },
#ifdef SIM_HAVE_ADDR_RANGE
{ {"profile-range", required_argument, NULL, OPTION_PROFILE_RANGE},
'\0', "START,END", "Specify range of addresses for instruction and model profiling",
profile_option_handler, NULL },
#if 0 /*wip*/
{ {"profile-function", required_argument, NULL, OPTION_PROFILE_FUNCTION},
'\0', "FUNCTION", "Specify function to profile",
profile_option_handler, NULL },
#endif
#endif
{ {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL, NULL }
};
/* Set/reset the profile options indicated in MASK. */
SIM_RC
set_profile_option_mask (SIM_DESC sd, const char *name, int mask, const char *arg)
{
int profile_nr;
int cpu_nr;
int profile_val = 1;
if (arg != NULL)
{
if (strcmp (arg, "yes") == 0
|| strcmp (arg, "on") == 0
|| strcmp (arg, "1") == 0)
profile_val = 1;
else if (strcmp (arg, "no") == 0
|| strcmp (arg, "off") == 0
|| strcmp (arg, "0") == 0)
profile_val = 0;
else
{
sim_io_eprintf (sd, "Argument `%s' for `--profile%s' invalid, one of `on', `off', `yes', `no' expected\n", arg, name);
return SIM_RC_FAIL;
}
}
/* update applicable profile bits */
for (profile_nr = 0; profile_nr < MAX_PROFILE_VALUES; ++profile_nr)
{
if ((mask & (1 << profile_nr)) == 0)
continue;
#if 0 /* see sim-trace.c, set flags in STATE here if/when there are any */
/* Set non-cpu specific values. */
switch (profile_nr)
{
case ??? :
break;
}
#endif
/* Set cpu values. */
for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; cpu_nr++)
{
CPU_PROFILE_FLAGS (STATE_CPU (sd, cpu_nr))[profile_nr] = profile_val;
}
}
/* Re-compute the cpu profile summary. */
if (profile_val)
{
for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; cpu_nr++)
CPU_PROFILE_DATA (STATE_CPU (sd, cpu_nr))->profile_any_p = 1;
}
else
{
for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; cpu_nr++)
{
CPU_PROFILE_DATA (STATE_CPU (sd, cpu_nr))->profile_any_p = 0;
for (profile_nr = 0; profile_nr < MAX_PROFILE_VALUES; ++profile_nr)
{
if (CPU_PROFILE_FLAGS (STATE_CPU (sd, cpu_nr))[profile_nr])
{
CPU_PROFILE_DATA (STATE_CPU (sd, cpu_nr))->profile_any_p = 1;
break;
}
}
}
}
return SIM_RC_OK;
}
/* Set one profile option based on its IDX value.
Not static as cgen-scache.c uses it. */
SIM_RC
sim_profile_set_option (SIM_DESC sd, const char *name, int idx, const char *arg)
{
return set_profile_option_mask (sd, name, 1 << idx, arg);
}
static SIM_RC
parse_frequency (SIM_DESC sd, const char *arg, unsigned long *freq)
{
const char *ch;
/* First, parse a decimal number. */
*freq = 0;
ch = arg;
if (isdigit (*arg))
{
for (/**/; *ch != '\0'; ++ch)
{
if (! isdigit (*ch))
break;
*freq = *freq * 10 + (*ch - '0');
}
/* Accept KHz, MHz or Hz as a suffix. */
if (tolower (*ch) == 'm')
{
*freq *= 1000000;
++ch;
}
else if (tolower (*ch) == 'k')
{
*freq *= 1000;
++ch;
}
if (tolower (*ch) == 'h')
{
++ch;
if (tolower (*ch) == 'z')
++ch;
}
}
if (*ch != '\0')
{
sim_io_eprintf (sd, "Invalid argument for --profile-cpu-frequency: %s\n",
arg);
*freq = 0;
return SIM_RC_FAIL;
}
return SIM_RC_OK;
}
static SIM_RC
profile_option_handler (SIM_DESC sd,
sim_cpu *cpu,
int opt,
char *arg,
int is_command)
{
int cpu_nr;
/* FIXME: Need to handle `cpu' arg. */
switch (opt)
{
case 'p' :
if (! WITH_PROFILE)
sim_io_eprintf (sd, "Profiling not compiled in, `-p' ignored\n");
else
return set_profile_option_mask (sd, "profile", PROFILE_USEFUL_MASK,
arg);
break;
case OPTION_PROFILE_INSN :
if (WITH_PROFILE_INSN_P)
return sim_profile_set_option (sd, "-insn", PROFILE_INSN_IDX, arg);
else
sim_io_eprintf (sd, "Instruction profiling not compiled in, `--profile-insn' ignored\n");
break;
case OPTION_PROFILE_MEMORY :
if (WITH_PROFILE_MEMORY_P)
return sim_profile_set_option (sd, "-memory", PROFILE_MEMORY_IDX, arg);
else
sim_io_eprintf (sd, "Memory profiling not compiled in, `--profile-memory' ignored\n");
break;
case OPTION_PROFILE_CORE :
if (WITH_PROFILE_CORE_P)
return sim_profile_set_option (sd, "-core", PROFILE_CORE_IDX, arg);
else
sim_io_eprintf (sd, "CORE profiling not compiled in, `--profile-core' ignored\n");
break;
case OPTION_PROFILE_MODEL :
if (WITH_PROFILE_MODEL_P)
return sim_profile_set_option (sd, "-model", PROFILE_MODEL_IDX, arg);
else
sim_io_eprintf (sd, "Model profiling not compiled in, `--profile-model' ignored\n");
break;
case OPTION_PROFILE_CPU_FREQUENCY :
{
unsigned long val;
SIM_RC rc = parse_frequency (sd, arg, &val);
if (rc == SIM_RC_OK)
{
for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; ++cpu_nr)
PROFILE_CPU_FREQ (CPU_PROFILE_DATA (STATE_CPU (sd,cpu_nr))) = val;
}
return rc;
}
case OPTION_PROFILE_FILE :
/* FIXME: Might want this to apply to pc profiling only,
or have two profile file options. */
if (! WITH_PROFILE)
sim_io_eprintf (sd, "Profiling not compiled in, `--profile-file' ignored\n");
else
{
FILE *f = fopen (arg, "w");
if (f == NULL)
{
sim_io_eprintf (sd, "Unable to open profile output file `%s'\n", arg);
return SIM_RC_FAIL;
}
for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; ++cpu_nr)
PROFILE_FILE (CPU_PROFILE_DATA (STATE_CPU (sd, cpu_nr))) = f;
}
break;
case OPTION_PROFILE_PC:
if (WITH_PROFILE_PC_P)
return sim_profile_set_option (sd, "-pc", PROFILE_PC_IDX, arg);
else
sim_io_eprintf (sd, "PC profiling not compiled in, `--profile-pc' ignored\n");
break;
case 'F' :
if (WITH_PROFILE_PC_P)
{
/* FIXME: Validate arg. */
int val = atoi (arg);
for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; ++cpu_nr)
PROFILE_PC_FREQ (CPU_PROFILE_DATA (STATE_CPU (sd, cpu_nr))) = val;
for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; ++cpu_nr)
CPU_PROFILE_FLAGS (STATE_CPU (sd, cpu_nr))[PROFILE_PC_IDX] = 1;
}
else
sim_io_eprintf (sd, "PC profiling not compiled in, `--profile-pc-frequency' ignored\n");
break;
case 'S' :
if (WITH_PROFILE_PC_P)
{
/* FIXME: Validate arg. */
int val = atoi (arg);
for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; ++cpu_nr)
PROFILE_PC_NR_BUCKETS (CPU_PROFILE_DATA (STATE_CPU (sd, cpu_nr))) = val;
for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; ++cpu_nr)
CPU_PROFILE_FLAGS (STATE_CPU (sd, cpu_nr))[PROFILE_PC_IDX] = 1;
}
else
sim_io_eprintf (sd, "PC profiling not compiled in, `--profile-pc-size' ignored\n");
break;
case OPTION_PROFILE_PC_GRANULARITY:
if (WITH_PROFILE_PC_P)
{
int shift;
int val = atoi (arg);
/* check that the granularity is a power of two */
shift = 0;
while (val > (1 << shift))
{
shift += 1;
}
if (val != (1 << shift))
{
sim_io_eprintf (sd, "PC profiling granularity not a power of two\n");
return SIM_RC_FAIL;
}
if (shift == 0)
{
sim_io_eprintf (sd, "PC profiling granularity too small");
return SIM_RC_FAIL;
}
for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; ++cpu_nr)
PROFILE_PC_SHIFT (CPU_PROFILE_DATA (STATE_CPU (sd, cpu_nr))) = shift;
for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; ++cpu_nr)
CPU_PROFILE_FLAGS (STATE_CPU (sd, cpu_nr))[PROFILE_PC_IDX] = 1;
}
else
sim_io_eprintf (sd, "PC profiling not compiled in, `--profile-pc-granularity' ignored\n");
break;
case OPTION_PROFILE_PC_RANGE:
if (WITH_PROFILE_PC_P)
{
/* FIXME: Validate args */
char *chp = arg;
unsigned long base;
unsigned long bound;
base = strtoul (chp, &chp, 0);
if (*chp != ',')
{
sim_io_eprintf (sd, "--profile-pc-range missing BOUND argument\n");
return SIM_RC_FAIL;
}
bound = strtoul (chp + 1, NULL, 0);
for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; ++cpu_nr)
{
PROFILE_PC_START (CPU_PROFILE_DATA (STATE_CPU (sd, cpu_nr))) = base;
PROFILE_PC_END (CPU_PROFILE_DATA (STATE_CPU (sd, cpu_nr))) = bound;
}
for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; ++cpu_nr)
CPU_PROFILE_FLAGS (STATE_CPU (sd, cpu_nr))[PROFILE_PC_IDX] = 1;
}
else
sim_io_eprintf (sd, "PC profiling not compiled in, `--profile-pc-range' ignored\n");
break;
#ifdef SIM_HAVE_ADDR_RANGE
case OPTION_PROFILE_RANGE :
if (WITH_PROFILE)
{
char *chp = arg;
unsigned long start,end;
start = strtoul (chp, &chp, 0);
if (*chp != ',')
{
sim_io_eprintf (sd, "--profile-range missing END argument\n");
return SIM_RC_FAIL;
}
end = strtoul (chp + 1, NULL, 0);
/* FIXME: Argument validation. */
if (cpu != NULL)
sim_addr_range_add (PROFILE_RANGE (CPU_PROFILE_DATA (cpu)),
start, end);
else
for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; ++cpu_nr)
sim_addr_range_add (PROFILE_RANGE (CPU_PROFILE_DATA (STATE_CPU (sd, cpu_nr))),
start, end);
}
else
sim_io_eprintf (sd, "Profiling not compiled in, `--profile-range' ignored\n");
break;
case OPTION_PROFILE_FUNCTION :
if (WITH_PROFILE)
{
/*wip: need to compute function range given name*/
}
else
sim_io_eprintf (sd, "Profiling not compiled in, `--profile-function' ignored\n");
break;
#endif /* SIM_HAVE_ADDR_RANGE */
}
return SIM_RC_OK;
}
/* Profiling output hooks. */
static void ATTRIBUTE_PRINTF (3, 0)
profile_vprintf (SIM_DESC sd, sim_cpu *cpu, const char *fmt, va_list ap)
{
FILE *fp = PROFILE_FILE (CPU_PROFILE_DATA (cpu));
/* If an output file was given, redirect output to that. */
if (fp != NULL)
vfprintf (fp, fmt, ap);
else
sim_io_evprintf (sd, fmt, ap);
}
ATTRIBUTE_PRINTF (3, 4)
static void
profile_printf (SIM_DESC sd, sim_cpu *cpu, const char *fmt, ...)
{
va_list ap;
va_start (ap, fmt);
profile_vprintf (sd, cpu, fmt, ap);
va_end (ap);
}
/* PC profiling support */
#if WITH_PROFILE_PC_P
static void
profile_pc_cleanup (SIM_DESC sd)
{
int n;
for (n = 0; n < MAX_NR_PROCESSORS; n++)
{
sim_cpu *cpu = STATE_CPU (sd, n);
PROFILE_DATA *data = CPU_PROFILE_DATA (cpu);
if (PROFILE_PC_COUNT (data) != NULL)
free (PROFILE_PC_COUNT (data));
PROFILE_PC_COUNT (data) = NULL;
if (PROFILE_PC_EVENT (data) != NULL)
sim_events_deschedule (sd, PROFILE_PC_EVENT (data));
PROFILE_PC_EVENT (data) = NULL;
}
}
static void
profile_pc_uninstall (SIM_DESC sd)
{
profile_pc_cleanup (sd);
}
static void
profile_pc_event (SIM_DESC sd,
void *data)
{
sim_cpu *cpu = (sim_cpu*) data;
PROFILE_DATA *profile = CPU_PROFILE_DATA (cpu);
address_word pc = sim_pc_get (cpu);
unsigned i;
i = (pc - PROFILE_PC_START (profile)) >> PROFILE_PC_SHIFT (profile);
if (i < PROFILE_PC_NR_BUCKETS (profile))
PROFILE_PC_COUNT (profile) [i] += 1; /* Overflow? */
else
PROFILE_PC_COUNT (profile) [PROFILE_PC_NR_BUCKETS (profile)] += 1;
PROFILE_PC_EVENT (profile) =
sim_events_schedule (sd, PROFILE_PC_FREQ (profile), profile_pc_event, cpu);
}
static SIM_RC
profile_pc_init (SIM_DESC sd)
{
int n;
profile_pc_cleanup (sd);
for (n = 0; n < MAX_NR_PROCESSORS; n++)
{
sim_cpu *cpu = STATE_CPU (sd, n);
PROFILE_DATA *data = CPU_PROFILE_DATA (cpu);
if (CPU_PROFILE_FLAGS (STATE_CPU (sd, n))[PROFILE_PC_IDX])
{
int bucket_size;
/* fill in the frequency if not specified */
if (PROFILE_PC_FREQ (data) == 0)
PROFILE_PC_FREQ (data) = 257;
/* fill in the start/end if not specified */
if (PROFILE_PC_END (data) == 0)
{
PROFILE_PC_START (data) = STATE_TEXT_START (sd);
PROFILE_PC_END (data) = STATE_TEXT_END (sd);
}
/* Compute the number of buckets if not specified. */
if (PROFILE_PC_NR_BUCKETS (data) == 0)
{
if (PROFILE_PC_BUCKET_SIZE (data) == 0)
PROFILE_PC_NR_BUCKETS (data) = 16;
else
{
if (PROFILE_PC_END (data) == 0)
{
/* nr_buckets = (full-address-range / 2) / (bucket_size / 2) */
PROFILE_PC_NR_BUCKETS (data) =
((1ULL << sizeof (sim_cia) * (8 - 1))
/ (PROFILE_PC_BUCKET_SIZE (data) / 2));
}
else
{
PROFILE_PC_NR_BUCKETS (data) =
((PROFILE_PC_END (data)
- PROFILE_PC_START (data)
+ PROFILE_PC_BUCKET_SIZE (data) - 1)
/ PROFILE_PC_BUCKET_SIZE (data));
}
}
}
/* Compute the bucket size if not specified. Ensure that it
is rounded up to the next power of two */
if (PROFILE_PC_BUCKET_SIZE (data) == 0)
{
if (PROFILE_PC_END (data) == 0)
/* bucket_size = (full-address-range / 2) / (nr_buckets / 2) */
bucket_size = ((1ULL << ((sizeof (sim_cia) * 8) - 1))
/ (PROFILE_PC_NR_BUCKETS (data) / 2));
else
bucket_size = ((PROFILE_PC_END (data)
- PROFILE_PC_START (data)
+ PROFILE_PC_NR_BUCKETS (data) - 1)
/ PROFILE_PC_NR_BUCKETS (data));
PROFILE_PC_SHIFT (data) = 0;
while (bucket_size > PROFILE_PC_BUCKET_SIZE (data))
{
PROFILE_PC_SHIFT (data) += 1;
}
}
/* Align the end address with bucket size */
if (PROFILE_PC_END (data) != 0)
PROFILE_PC_END (data) = (PROFILE_PC_START (data)
+ (PROFILE_PC_BUCKET_SIZE (data)
* PROFILE_PC_NR_BUCKETS (data)));
/* create the relevant buffers */
PROFILE_PC_COUNT (data) =
NZALLOC (unsigned, PROFILE_PC_NR_BUCKETS (data) + 1);
PROFILE_PC_EVENT (data) =
sim_events_schedule (sd,
PROFILE_PC_FREQ (data),
profile_pc_event,
cpu);
}
}
return SIM_RC_OK;
}
static void
profile_print_pc (sim_cpu *cpu, int verbose)
{
SIM_DESC sd = CPU_STATE (cpu);
PROFILE_DATA *profile = CPU_PROFILE_DATA (cpu);
char comma_buf[20];
unsigned max_val;
unsigned total;
unsigned i;
if (PROFILE_PC_COUNT (profile) == 0)
return;
profile_printf (sd, cpu, "Program Counter Statistics:\n\n");
/* First pass over data computes various things. */
max_val = 0;
total = 0;
for (i = 0; i <= PROFILE_PC_NR_BUCKETS (profile); ++i)
{
total += PROFILE_PC_COUNT (profile) [i];
if (PROFILE_PC_COUNT (profile) [i] > max_val)
max_val = PROFILE_PC_COUNT (profile) [i];
}
profile_printf (sd, cpu, " Total samples: %s\n",
COMMAS (total));
profile_printf (sd, cpu, " Granularity: %s bytes per bucket\n",
COMMAS (PROFILE_PC_BUCKET_SIZE (profile)));
profile_printf (sd, cpu, " Size: %s buckets\n",
COMMAS (PROFILE_PC_NR_BUCKETS (profile)));
profile_printf (sd, cpu, " Frequency: %s cycles per sample\n",
COMMAS (PROFILE_PC_FREQ (profile)));
if (PROFILE_PC_END (profile) != 0)
profile_printf (sd, cpu, " Range: 0x%lx 0x%lx\n",
(long) PROFILE_PC_START (profile),
(long) PROFILE_PC_END (profile));
if (verbose && max_val != 0)
{
/* Now we can print the histogram. */
profile_printf (sd, cpu, "\n");
for (i = 0; i <= PROFILE_PC_NR_BUCKETS (profile); ++i)
{
if (PROFILE_PC_COUNT (profile) [i] != 0)
{
profile_printf (sd, cpu, " ");
if (i == PROFILE_PC_NR_BUCKETS (profile))
profile_printf (sd, cpu, "%10s:", "overflow");
else
profile_printf (sd, cpu, "0x%08lx:",
(long) (PROFILE_PC_START (profile)
+ (i * PROFILE_PC_BUCKET_SIZE (profile))));
profile_printf (sd, cpu, " %*s",
max_val < 10000 ? 5 : 10,
COMMAS (PROFILE_PC_COUNT (profile) [i]));
profile_printf (sd, cpu, " %4.1f",
(PROFILE_PC_COUNT (profile) [i] * 100.0) / total);
profile_printf (sd, cpu, ": ");
sim_profile_print_bar (sd, cpu, PROFILE_HISTOGRAM_WIDTH,
PROFILE_PC_COUNT (profile) [i],
max_val);
profile_printf (sd, cpu, "\n");
}
}
}
/* dump the histogram to the file "gmon.out" using BSD's gprof file
format */
/* Since a profile data file is in the native format of the host on
which the profile is being, endian issues are not considered in
the code below. */
/* FIXME: Is this the best place for this code? */
{
FILE *pf = fopen ("gmon.out", "wb");
if (pf == NULL)
sim_io_eprintf (sd, "Failed to open \"gmon.out\" profile file\n");
else
{
int ok;
/* FIXME: what if the target has a 64 bit PC? */
unsigned32 header[3];
unsigned loop;
if (PROFILE_PC_END (profile) != 0)
{
header[0] = PROFILE_PC_START (profile);
header[1] = PROFILE_PC_END (profile);
}
else
{
header[0] = 0;
header[1] = 0;
}
/* size of sample buffer (+ header) */
header[2] = PROFILE_PC_NR_BUCKETS (profile) * 2 + sizeof (header);
/* Header must be written out in target byte order. */
H2T (header[0]);
H2T (header[1]);
H2T (header[2]);
ok = fwrite (&header, sizeof (header), 1, pf);
for (loop = 0;
ok && (loop < PROFILE_PC_NR_BUCKETS (profile));
loop++)
{
signed16 sample;
if (PROFILE_PC_COUNT (profile) [loop] >= 0xffff)
sample = 0xffff;
else
sample = PROFILE_PC_COUNT (profile) [loop];
H2T (sample);
ok = fwrite (&sample, sizeof (sample), 1, pf);
}
if (ok == 0)
sim_io_eprintf (sd, "Failed to write to \"gmon.out\" profile file\n");
fclose (pf);
}
}
profile_printf (sd, cpu, "\n");
}
#endif
/* Summary printing support. */
#if WITH_PROFILE_INSN_P
static SIM_RC
profile_insn_init (SIM_DESC sd)
{
int c;
for (c = 0; c < MAX_NR_PROCESSORS; ++c)
{
sim_cpu *cpu = STATE_CPU (sd, c);
if (CPU_MAX_INSNS (cpu) > 0)
PROFILE_INSN_COUNT (CPU_PROFILE_DATA (cpu)) = NZALLOC (unsigned int, CPU_MAX_INSNS (cpu));
}
return SIM_RC_OK;
}
static void
profile_print_insn (sim_cpu *cpu, int verbose)
{
unsigned int i, n, total, max_val, max_name_len;
SIM_DESC sd = CPU_STATE (cpu);
PROFILE_DATA *data = CPU_PROFILE_DATA (cpu);
char comma_buf[20];
/* If MAX_INSNS not set, insn profiling isn't supported. */
if (CPU_MAX_INSNS (cpu) == 0)
return;
profile_printf (sd, cpu, "Instruction Statistics");
#ifdef SIM_HAVE_ADDR_RANGE
if (PROFILE_RANGE (data)->ranges)
profile_printf (sd, cpu, " (for selected address range(s))");
#endif
profile_printf (sd, cpu, "\n\n");
/* First pass over data computes various things. */
max_val = 0;
total = 0;
max_name_len = 0;
for (i = 0; i < CPU_MAX_INSNS (cpu); ++i)
{
const char *name = (*CPU_INSN_NAME (cpu)) (cpu, i);
if (name == NULL)
continue;
total += PROFILE_INSN_COUNT (data) [i];
if (PROFILE_INSN_COUNT (data) [i] > max_val)
max_val = PROFILE_INSN_COUNT (data) [i];
n = strlen (name);
if (n > max_name_len)
max_name_len = n;
}
/* set the total insn count, in case client is being lazy */
if (! PROFILE_TOTAL_INSN_COUNT (data))
PROFILE_TOTAL_INSN_COUNT (data) = total;
profile_printf (sd, cpu, " Total: %s insns\n", COMMAS (total));
if (verbose && max_val != 0)
{
/* Now we can print the histogram. */
profile_printf (sd, cpu, "\n");
for (i = 0; i < CPU_MAX_INSNS (cpu); ++i)
{
const char *name = (*CPU_INSN_NAME (cpu)) (cpu, i);
if (name == NULL)
continue;
if (PROFILE_INSN_COUNT (data) [i] != 0)
{
profile_printf (sd, cpu, " %*s: %*s: ",
max_name_len, name,
max_val < 10000 ? 5 : 10,
COMMAS (PROFILE_INSN_COUNT (data) [i]));
sim_profile_print_bar (sd, cpu, PROFILE_HISTOGRAM_WIDTH,
PROFILE_INSN_COUNT (data) [i],
max_val);
profile_printf (sd, cpu, "\n");
}
}
}
profile_printf (sd, cpu, "\n");
}
#endif
#if WITH_PROFILE_MEMORY_P
static void
profile_print_memory (sim_cpu *cpu, int verbose)
{
unsigned int i, n;
unsigned int total_read, total_write;
unsigned int max_val, max_name_len;
/* FIXME: Need to add smp support. */
SIM_DESC sd = CPU_STATE (cpu);
PROFILE_DATA *data = CPU_PROFILE_DATA (cpu);
char comma_buf[20];
profile_printf (sd, cpu, "Memory Access Statistics\n\n");
/* First pass over data computes various things. */
max_val = total_read = total_write = max_name_len = 0;
for (i = 0; i < MODE_TARGET_MAX; ++i)
{
total_read += PROFILE_READ_COUNT (data) [i];
total_write += PROFILE_WRITE_COUNT (data) [i];
if (PROFILE_READ_COUNT (data) [i] > max_val)
max_val = PROFILE_READ_COUNT (data) [i];
if (PROFILE_WRITE_COUNT (data) [i] > max_val)
max_val = PROFILE_WRITE_COUNT (data) [i];
n = strlen (MODE_NAME (i));
if (n > max_name_len)
max_name_len = n;
}
/* One could use PROFILE_LABEL_WIDTH here. I chose not to. */
profile_printf (sd, cpu, " Total read: %s accesses\n",
COMMAS (total_read));
profile_printf (sd, cpu, " Total write: %s accesses\n",
COMMAS (total_write));
if (verbose && max_val != 0)
{
/* FIXME: Need to separate instruction fetches from data fetches
as the former swamps the latter. */
/* Now we can print the histogram. */
profile_printf (sd, cpu, "\n");
for (i = 0; i < MODE_TARGET_MAX; ++i)
{
if (PROFILE_READ_COUNT (data) [i] != 0)
{
profile_printf (sd, cpu, " %*s read: %*s: ",
max_name_len, MODE_NAME (i),
max_val < 10000 ? 5 : 10,
COMMAS (PROFILE_READ_COUNT (data) [i]));
sim_profile_print_bar (sd, cpu, PROFILE_HISTOGRAM_WIDTH,
PROFILE_READ_COUNT (data) [i],
max_val);
profile_printf (sd, cpu, "\n");
}
if (PROFILE_WRITE_COUNT (data) [i] != 0)
{
profile_printf (sd, cpu, " %*s write: %*s: ",
max_name_len, MODE_NAME (i),
max_val < 10000 ? 5 : 10,
COMMAS (PROFILE_WRITE_COUNT (data) [i]));
sim_profile_print_bar (sd, cpu, PROFILE_HISTOGRAM_WIDTH,
PROFILE_WRITE_COUNT (data) [i],
max_val);
profile_printf (sd, cpu, "\n");
}
}
}
profile_printf (sd, cpu, "\n");
}
#endif
#if WITH_PROFILE_CORE_P
static void
profile_print_core (sim_cpu *cpu, int verbose)
{
unsigned int total;
unsigned int max_val;
/* FIXME: Need to add smp support. */
SIM_DESC sd = CPU_STATE (cpu);
PROFILE_DATA *data = CPU_PROFILE_DATA (cpu);
char comma_buf[20];
profile_printf (sd, cpu, "CORE Statistics\n\n");
/* First pass over data computes various things. */
{
unsigned map;
total = 0;
max_val = 0;
for (map = 0; map < nr_maps; map++)
{
total += PROFILE_CORE_COUNT (data) [map];
if (PROFILE_CORE_COUNT (data) [map] > max_val)
max_val = PROFILE_CORE_COUNT (data) [map];
}
}
/* One could use PROFILE_LABEL_WIDTH here. I chose not to. */
profile_printf (sd, cpu, " Total: %s accesses\n",
COMMAS (total));
if (verbose && max_val != 0)
{
unsigned map;
/* Now we can print the histogram. */
profile_printf (sd, cpu, "\n");
for (map = 0; map < nr_maps; map++)
{
if (PROFILE_CORE_COUNT (data) [map] != 0)
{
profile_printf (sd, cpu, "%10s:", map_to_str (map));
profile_printf (sd, cpu, "%*s: ",
max_val < 10000 ? 5 : 10,
COMMAS (PROFILE_CORE_COUNT (data) [map]));
sim_profile_print_bar (sd, cpu, PROFILE_HISTOGRAM_WIDTH,
PROFILE_CORE_COUNT (data) [map],
max_val);
profile_printf (sd, cpu, "\n");
}
}
}
profile_printf (sd, cpu, "\n");
}
#endif
#if WITH_PROFILE_MODEL_P
static void
profile_print_model (sim_cpu *cpu, int verbose)
{
SIM_DESC sd = CPU_STATE (cpu);
PROFILE_DATA *data = CPU_PROFILE_DATA (cpu);
unsigned long cti_stall_cycles = PROFILE_MODEL_CTI_STALL_CYCLES (data);
unsigned long load_stall_cycles = PROFILE_MODEL_LOAD_STALL_CYCLES (data);
unsigned long total_cycles = PROFILE_MODEL_TOTAL_CYCLES (data);
char comma_buf[20];
profile_printf (sd, cpu, "Model %s Timing Information",
MODEL_NAME (CPU_MODEL (cpu)));
#ifdef SIM_HAVE_ADDR_RANGE
if (PROFILE_RANGE (data)->ranges)
profile_printf (sd, cpu, " (for selected address range(s))");
#endif
profile_printf (sd, cpu, "\n\n");
profile_printf (sd, cpu, " %-*s %s\n",
PROFILE_LABEL_WIDTH, "Taken branches:",
COMMAS (PROFILE_MODEL_TAKEN_COUNT (data)));
profile_printf (sd, cpu, " %-*s %s\n",
PROFILE_LABEL_WIDTH, "Untaken branches:",
COMMAS (PROFILE_MODEL_UNTAKEN_COUNT (data)));
profile_printf (sd, cpu, " %-*s %s\n",
PROFILE_LABEL_WIDTH, "Cycles stalled due to branches:",
COMMAS (cti_stall_cycles));
profile_printf (sd, cpu, " %-*s %s\n",
PROFILE_LABEL_WIDTH, "Cycles stalled due to loads:",
COMMAS (load_stall_cycles));
profile_printf (sd, cpu, " %-*s %s\n",
PROFILE_LABEL_WIDTH, "Total cycles (*approximate*):",
COMMAS (total_cycles));
profile_printf (sd, cpu, "\n");
}
#endif
void
sim_profile_print_bar (SIM_DESC sd, sim_cpu *cpu, unsigned int width,
unsigned int val, unsigned int max_val)
{
unsigned int i, count;
count = ((double) val / (double) max_val) * (double) width;
for (i = 0; i < count; ++i)
profile_printf (sd, cpu, "*");
}
/* Print the simulator's execution speed for CPU. */
static void
profile_print_speed (sim_cpu *cpu)
{
SIM_DESC sd = CPU_STATE (cpu);
PROFILE_DATA *data = CPU_PROFILE_DATA (cpu);
unsigned long milliseconds = sim_events_elapsed_time (sd);
unsigned long total = PROFILE_TOTAL_INSN_COUNT (data);
double clock;
double secs;
char comma_buf[20];
profile_printf (sd, cpu, "Simulator Execution Speed\n\n");
if (total != 0)
profile_printf (sd, cpu, " Total instructions: %s\n", COMMAS (total));
if (milliseconds < 1000)
profile_printf (sd, cpu, " Total execution time: < 1 second\n\n");
else
{
/* The printing of the time rounded to 2 decimal places makes the speed
calculation seem incorrect [even though it is correct]. So round
MILLISECONDS first. This can marginally affect the result, but it's
better that the user not perceive there's a math error. */
secs = (double) milliseconds / 1000;
secs = ((double) (unsigned long) (secs * 100 + .5)) / 100;
profile_printf (sd, cpu, " Total execution time : %.2f seconds\n", secs);
/* Don't confuse things with data that isn't useful.
If we ran for less than 2 seconds, only use the data if we
executed more than 100,000 insns. */
if (secs >= 2 || total >= 100000)
profile_printf (sd, cpu, " Simulator speed: %s insns/second\n",
COMMAS ((unsigned long) ((double) total / secs)));
}
/* Print simulated execution time if the cpu frequency has been specified. */
clock = PROFILE_CPU_FREQ (data);
if (clock != 0)
{
if (clock >= 1000000)
profile_printf (sd, cpu, " Simulated cpu frequency: %.2f MHz\n",
clock / 1000000);
else
profile_printf (sd, cpu, " Simulated cpu frequency: %.2f Hz\n", clock);
#if WITH_PROFILE_MODEL_P
if (PROFILE_FLAGS (data) [PROFILE_MODEL_IDX])
{
/* The printing of the time rounded to 2 decimal places makes the
speed calculation seem incorrect [even though it is correct].
So round SECS first. This can marginally affect the result,
but it's better that the user not perceive there's a math
error. */
secs = PROFILE_MODEL_TOTAL_CYCLES (data) / clock;
secs = ((double) (unsigned long) (secs * 100 + .5)) / 100;
profile_printf (sd, cpu, " Simulated execution time: %.2f seconds\n",
secs);
}
#endif /* WITH_PROFILE_MODEL_P */
}
}
#ifdef SIM_HAVE_ADDR_RANGE
/* Print selected address ranges. */
static void
profile_print_addr_ranges (sim_cpu *cpu)
{
ADDR_SUBRANGE *asr = PROFILE_RANGE (CPU_PROFILE_DATA (cpu))->ranges;
SIM_DESC sd = CPU_STATE (cpu);
if (asr)
{
profile_printf (sd, cpu, "Selected address ranges\n\n");
while (asr != NULL)
{
profile_printf (sd, cpu, " 0x%lx - 0x%lx\n",
(long) asr->start, (long) asr->end);
asr = asr->next;
}
profile_printf (sd, cpu, "\n");
}
}
#endif
/* Top level function to print all summary profile information.
It is [currently] intended that all such data is printed by this function.
I'd rather keep it all in one place for now. To that end, MISC_CPU and
MISC are callbacks used to print any miscellaneous data.
One might want to add a user option that allows printing by type or by cpu
(i.e. print all insn data for each cpu first, or print data cpu by cpu).
This may be a case of featuritis so it's currently left out.
Note that results are indented two spaces to distinguish them from
section titles. */
static void
profile_info (SIM_DESC sd, int verbose)
{
int i,c;
int print_title_p = 0;
/* Only print the title if some data has been collected. */
/* ??? Why don't we just exit if no data collected? */
/* FIXME: If the number of processors can be selected on the command line,
then MAX_NR_PROCESSORS will need to take an argument of `sd'. */
for (c = 0; c < MAX_NR_PROCESSORS && !print_title_p; ++c)
{
sim_cpu *cpu = STATE_CPU (sd, c);
PROFILE_DATA *data = CPU_PROFILE_DATA (cpu);
for (i = 0; i < MAX_PROFILE_VALUES; ++i)
if (PROFILE_FLAGS (data) [i])
{
profile_printf (sd, cpu, "Summary profiling results:\n\n");
print_title_p = 1;
break;
}
}
/* Loop, cpu by cpu, printing results. */
for (c = 0; c < MAX_NR_PROCESSORS; ++c)
{
sim_cpu *cpu = STATE_CPU (sd, c);
PROFILE_DATA *data = CPU_PROFILE_DATA (cpu);
if (MAX_NR_PROCESSORS > 1
&& (0
#if WITH_PROFILE_INSN_P
|| PROFILE_FLAGS (data) [PROFILE_INSN_IDX]
#endif
#if WITH_PROFILE_MEMORY_P
|| PROFILE_FLAGS (data) [PROFILE_MEMORY_IDX]
#endif
#if WITH_PROFILE_CORE_P
|| PROFILE_FLAGS (data) [PROFILE_CORE_IDX]
#endif
#if WITH_PROFILE_MODEL_P
|| PROFILE_FLAGS (data) [PROFILE_MODEL_IDX]
#endif
#if WITH_PROFILE_SCACHE_P && WITH_SCACHE && defined(CGEN_ARCH)
|| PROFILE_FLAGS (data) [PROFILE_SCACHE_IDX]
#endif
#if WITH_PROFILE_PC_P
|| PROFILE_FLAGS (data) [PROFILE_PC_IDX]
#endif
))
{
profile_printf (sd, cpu, "CPU %d\n\n", c);
}
#ifdef SIM_HAVE_ADDR_RANGE
if (print_title_p
&& (PROFILE_INSN_P (cpu)
|| PROFILE_MODEL_P (cpu)))
profile_print_addr_ranges (cpu);
#endif
#if WITH_PROFILE_INSN_P
if (PROFILE_FLAGS (data) [PROFILE_INSN_IDX])
profile_print_insn (cpu, verbose);
#endif
#if WITH_PROFILE_MEMORY_P
if (PROFILE_FLAGS (data) [PROFILE_MEMORY_IDX])
profile_print_memory (cpu, verbose);
#endif
#if WITH_PROFILE_CORE_P
if (PROFILE_FLAGS (data) [PROFILE_CORE_IDX])
profile_print_core (cpu, verbose);
#endif
#if WITH_PROFILE_MODEL_P
if (PROFILE_FLAGS (data) [PROFILE_MODEL_IDX])
profile_print_model (cpu, verbose);
#endif
#if WITH_PROFILE_SCACHE_P && WITH_SCACHE && defined(CGEN_ARCH)
if (PROFILE_FLAGS (data) [PROFILE_SCACHE_IDX])
scache_print_profile (cpu, verbose);
#endif
#if WITH_PROFILE_PC_P
if (PROFILE_FLAGS (data) [PROFILE_PC_IDX])
profile_print_pc (cpu, verbose);
#endif
/* Print cpu-specific data before the execution speed. */
if (PROFILE_INFO_CPU_CALLBACK (data) != NULL)
PROFILE_INFO_CPU_CALLBACK (data) (cpu, verbose);
/* Always try to print execution time and speed. */
if (verbose
|| PROFILE_FLAGS (data) [PROFILE_INSN_IDX])
profile_print_speed (cpu);
}
/* Finally print non-cpu specific miscellaneous data. */
if (STATE_PROFILE_INFO_CALLBACK (sd))
STATE_PROFILE_INFO_CALLBACK (sd) (sd, verbose);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
SIM_RC sim_install_profile (SIM_DESC sd);
/* Install profiling support in the simulator. */
SIM_RC
sim_install_profile (SIM_DESC sd)
{
int i;
SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
sim_add_option_table (sd, NULL, profile_options);
for (i = 0; i < MAX_NR_PROCESSORS; ++i)
memset (CPU_PROFILE_DATA (STATE_CPU (sd, i)), 0,
sizeof (* CPU_PROFILE_DATA (STATE_CPU (sd, i))));
#if WITH_PROFILE_INSN_P
sim_module_add_init_fn (sd, profile_insn_init);
#endif
#if WITH_PROFILE_PC_P
sim_module_add_uninstall_fn (sd, profile_pc_uninstall);
sim_module_add_init_fn (sd, profile_pc_init);
#endif
sim_module_add_init_fn (sd, profile_init);
sim_module_add_uninstall_fn (sd, profile_uninstall);
sim_module_add_info_fn (sd, profile_info);
return SIM_RC_OK;
}
static SIM_RC
profile_init (SIM_DESC sd)
{
#ifdef SIM_HAVE_ADDR_RANGE
/* Check if a range has been specified without specifying what to
collect. */
{
int i;
for (i = 0; i < MAX_NR_PROCESSORS; ++i)
{
sim_cpu *cpu = STATE_CPU (sd, i);
if (ADDR_RANGE_RANGES (PROFILE_RANGE (CPU_PROFILE_DATA (cpu)))
&& ! (PROFILE_INSN_P (cpu)
|| PROFILE_MODEL_P (cpu)))
{
sim_io_eprintf_cpu (cpu, "Profiling address range specified without --profile-insn or --profile-model.\n");
sim_io_eprintf_cpu (cpu, "Address range ignored.\n");
sim_addr_range_delete (PROFILE_RANGE (CPU_PROFILE_DATA (cpu)),
0, ~ (address_word) 0);
}
}
}
#endif
return SIM_RC_OK;
}
static void
profile_uninstall (SIM_DESC sd)
{
int i,j;
for (i = 0; i < MAX_NR_PROCESSORS; ++i)
{
sim_cpu *cpu = STATE_CPU (sd, i);
PROFILE_DATA *data = CPU_PROFILE_DATA (cpu);
if (PROFILE_FILE (data) != NULL)
{
/* If output from different cpus is going to the same file,
avoid closing the file twice. */
for (j = 0; j < i; ++j)
if (PROFILE_FILE (CPU_PROFILE_DATA (STATE_CPU (sd, j)))
== PROFILE_FILE (data))
break;
if (i == j)
fclose (PROFILE_FILE (data));
}
if (PROFILE_INSN_COUNT (data) != NULL)
free (PROFILE_INSN_COUNT (data));
}
}