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/* Default profiling support.
Copyright (C) 1996, 1997 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 2, 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, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "sim-main.h"
#include "sim-io.h"
#include "sim-options.h"
static MODULE_UNINSTALL_FN profile_uninstall;
static void print_bar (SIM_DESC, unsigned int, unsigned int, unsigned int);
static DECLARE_OPTION_HANDLER (profile_option_handler);
#define OPTION_PROFILE_INSN (OPTION_START + 0)
#define OPTION_PROFILE_MEMORY (OPTION_START + 1)
#define OPTION_PROFILE_MODEL (OPTION_START + 2)
#define OPTION_PROFILE_FILE (OPTION_START + 3)
#define OPTION_PROFILE_RANGE (OPTION_START + 4)
static const OPTION profile_options[] = {
{ {"profile", no_argument, NULL, 'p'},
'p', NULL, "Perform profiling",
profile_option_handler },
{ {"profile-insn", no_argument, NULL, OPTION_PROFILE_INSN},
'\0', NULL, "Perform instruction profiling",
profile_option_handler },
{ {"profile-memory", no_argument, NULL, OPTION_PROFILE_MEMORY},
'\0', NULL, "Perform memory profiling",
profile_option_handler },
{ {"profile-model", no_argument, NULL, OPTION_PROFILE_MODEL},
'\0', NULL, "Perform model profiling",
profile_option_handler },
{ {"profile-file", required_argument, NULL, OPTION_PROFILE_FILE},
'\0', "FILE NAME", "Specify profile output file",
profile_option_handler },
{ {"profile-pc-frequency", required_argument, NULL, 'F'},
'F', "PC PROFILE FREQUENCY", "Turn on PC profiling at specified frequency",
profile_option_handler },
{ {"profile-pc-size", required_argument, NULL, 'S'},
'S', "PC PROFILE SIZE", "Specify PC profiling size",
profile_option_handler },
#if 0 /*FIXME:wip*/
{ {"profile-range", required_argument, NULL, OPTION_PROFILE_RANGE},
0, NULL, "Specify range of addresses to profile",
profile_option_handler },
#endif
{ {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL }
};
static SIM_RC
profile_option_handler (SIM_DESC sd, int opt, char *arg)
{
int i,n;
switch (opt)
{
case 'p' :
if (! WITH_PROFILE)
sim_io_eprintf (sd, "Profiling not compiled in, -p option ignored\n");
else
{
for (n = 0; n < MAX_NR_PROCESSORS; ++n)
for (i = 0; i < MAX_PROFILE_VALUES; ++i)
CPU_PROFILE_FLAGS (STATE_CPU (sd, n))[i] = 1;
}
break;
case OPTION_PROFILE_INSN :
#if WITH_PROFILE_INSN_P
for (n = 0; n < MAX_NR_PROCESSORS; ++n)
CPU_PROFILE_FLAGS (STATE_CPU (sd, n))[PROFILE_INSN_IDX] = 1;
#else
sim_io_eprintf (sd, "Instruction profiling not compiled in, `--profile-insn' ignored\n");
#endif
break;
case OPTION_PROFILE_MEMORY :
#if WITH_PROFILE_MEMORY_P
for (n = 0; n < MAX_NR_PROCESSORS; ++n)
CPU_PROFILE_FLAGS (STATE_CPU (sd, n))[PROFILE_MEMORY_IDX] = 1;
#else
sim_io_eprintf (sd, "Memory profiling not compiled in, `--profile-memory' ignored\n");
#endif
break;
case OPTION_PROFILE_MODEL :
#if WITH_PROFILE_MODEL_P
for (n = 0; n < MAX_NR_PROCESSORS; ++n)
CPU_PROFILE_FLAGS (STATE_CPU (sd, n))[PROFILE_MODEL_IDX] = 1;
#else
sim_io_eprintf (sd, "Model profiling not compiled in, `--profile-model' ignored\n");
#endif
break;
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 (n = 0; n < MAX_NR_PROCESSORS; ++n)
PROFILE_FILE (CPU_PROFILE_DATA (STATE_CPU (sd, n))) = f;
}
break;
case 'F' :
#if WITH_PROFILE_PC_P
/* FIXME: Validate arg. */
i = atoi (arg);
for (n = 0; n < MAX_NR_PROCESSORS; ++n)
PROFILE_PC_FREQ (CPU_PROFILE_DATA (STATE_CPU (sd, n))) = i;
#else
sim_io_eprintf (sd, "PC profiling not compiled in, `--profile-pc-frequency' ignored\n");
#endif
break;
case 'S' :
#if WITH_PROFILE_PC_P
/* FIXME: Validate arg. */
i = atoi (arg);
for (n = 0; n < MAX_NR_PROCESSORS; ++n)
PROFILE_PC_SIZE (CPU_PROFILE_DATA (STATE_CPU (sd, n))) = i;
#else
sim_io_eprintf (sd, "PC profiling not compiled in, `--profile-pc-size' ignored\n");
#endif
break;
#if 0 /* FIXME:wip */
case OPTION_PROFILE_RANGE :
break;
#endif
}
return SIM_RC_OK;
}
SIM_RC
profile_install (SIM_DESC sd)
{
int i;
sim_add_option_table (sd, 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))));
sim_module_add_uninstall_fn (sd, profile_uninstall);
return SIM_RC_OK;
}
static void
profile_uninstall (SIM_DESC sd)
{
int i;
for (i = 0; i < MAX_NR_PROCESSORS; ++i)
{
PROFILE_DATA *data = CPU_PROFILE_DATA (STATE_CPU (sd, i));
if (PROFILE_FILE (data) != NULL)
fclose (PROFILE_FILE (data));
}
}
#if WITH_PROFILE_INSN_P
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);
sim_io_printf (sd, "Instruction Statistics\n\n");
/* First pass over data computes various things. */
max_val = total = max_name_len = 0;
for (i = 1; i < MAX_INSNS; ++i)
{
total += PROFILE_INSN_COUNT (data) [i];
if (PROFILE_INSN_COUNT (data) [i] > max_val)
max_val = PROFILE_INSN_COUNT (data) [i];
n = strlen (INSN_NAME (i));
if (n > max_name_len)
max_name_len = n;
}
sim_io_printf (sd, " Total: %d insns\n", total);
if (verbose && max_val != 0)
{
/* Now we can print the histogram. */
sim_io_printf (sd, "\n");
for (i = 1; i < MAX_INSNS; ++i)
{
if (PROFILE_INSN_COUNT (data) [i] != 0)
{
sim_io_printf (sd, " %*s: %*d: ",
max_name_len, INSN_NAME (i),
max_val < 10000 ? 4 : 8,
PROFILE_INSN_COUNT (data) [i]);
print_bar (sd, PROFILE_HISTOGRAM_WIDTH,
PROFILE_INSN_COUNT (data) [i],
max_val);
sim_io_printf (sd, "\n");
}
}
}
sim_io_printf (sd, "\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);
sim_io_printf (sd, "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 < MAX_MODES; ++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. */
sim_io_printf (sd, " Total read: %d accesses\n", total_read);
sim_io_printf (sd, " Total write: %d accesses\n", 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. */
sim_io_printf (sd, "\n");
for (i = 0; i < MAX_MODES; ++i)
{
if (PROFILE_READ_COUNT (data) [i] != 0)
{
sim_io_printf (sd, " %*s read: %*d: ",
max_name_len, MODE_NAME (i),
max_val < 10000 ? 4 : 8,
PROFILE_READ_COUNT (data) [i]);
print_bar (sd, PROFILE_HISTOGRAM_WIDTH,
PROFILE_READ_COUNT (data) [i],
max_val);
sim_io_printf (sd, "\n");
}
if (PROFILE_WRITE_COUNT (data) [i] != 0)
{
sim_io_printf (sd, " %*s write: %*d: ",
max_name_len, MODE_NAME (i),
max_val < 10000 ? 4 : 8,
PROFILE_WRITE_COUNT (data) [i]);
print_bar (sd, PROFILE_HISTOGRAM_WIDTH,
PROFILE_WRITE_COUNT (data) [i],
max_val);
sim_io_printf (sd, "\n");
}
}
}
sim_io_printf (sd, "\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_stalls = PROFILE_MODEL_CTI_STALL_COUNT (data);
unsigned long load_stalls = PROFILE_MODEL_LOAD_STALL_COUNT (data);
unsigned long total = PROFILE_MODEL_CYCLE_COUNT (data)
+ cti_stalls + load_stalls;
sim_io_printf (sd, "Model %s Timing Information\n\n",
MODEL_NAME (STATE_MODEL (sd)));
sim_io_printf (sd, " %-*s %ld\n",
PROFILE_LABEL_WIDTH, "Taken branches:",
PROFILE_MODEL_TAKEN_COUNT (data));
sim_io_printf (sd, " %-*s %ld\n",
PROFILE_LABEL_WIDTH, "Untaken branches:",
PROFILE_MODEL_UNTAKEN_COUNT (data));
sim_io_printf (sd, " %-*s %ld\n",
PROFILE_LABEL_WIDTH, "Cycles stalled due to branches:",
cti_stalls);
sim_io_printf (sd, " %-*s %ld\n",
PROFILE_LABEL_WIDTH, "Cycles stalled due to loads:",
load_stalls);
sim_io_printf (sd, " %-*s %ld\n",
PROFILE_LABEL_WIDTH, "Total cycles (*approximate*):",
total);
sim_io_printf (sd, "\n");
}
#endif
static void
print_bar (SIM_DESC sd, 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)
sim_io_printf (sd, "*");
}
/* 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 = PROFILE_EXEC_TIME (data);
unsigned long total = PROFILE_TOTAL_INSN_COUNT (data);
sim_io_printf (sd, "Simulator Execution Speed\n\n");
if (total != 0)
sim_io_printf (sd, " Total instructions: %ld\n", total);
if (milliseconds < 1000)
sim_io_printf (sd, " Total Execution Time: < 1 second\n\n");
else
{
sim_io_printf (sd, " Total Execution Time: %.2f seconds\n",
(double) milliseconds / 1000);
/* Don't confuse things with data that isn't useful.
If we ran for less than two seconds, only use the data if we
executed more than 100,000 insns. */
if (milliseconds >= 2000 || total >= 100000)
sim_io_printf (sd, " Simulator Speed: %.0f insns/second\n\n",
(double) total / ((double) milliseconds / 1000));
}
}
/* 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. */
void
profile_print (SIM_DESC sd, int verbose,
PROFILE_CALLBACK *misc, PROFILE_CPU_CALLBACK *misc_cpu)
{
int i,c;
int print_title_p = 0;
/* Only print the title if some data has been 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; ++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])
print_title_p = 1;
/* One could break out early if print_title_p is set. */
}
if (print_title_p)
sim_io_printf (sd, "Summary profiling results:\n\n");
/* 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)
sim_io_printf (sd, "CPU %d\n\n", c);
#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_MODEL_P
if (PROFILE_FLAGS (data) [PROFILE_MODEL_IDX])
profile_print_model (cpu, verbose);
#endif
#if WITH_PROFILE_SCACHE_P && WITH_SCACHE
if (PROFILE_FLAGS (data) [PROFILE_SCACHE_IDX])
scache_print_profile (cpu, verbose);
#endif
/* Print cpu-specific data before the execution speed. */
if (misc_cpu != NULL)
(*misc_cpu) (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 (misc != NULL)
(*misc) (sd, verbose);
}
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