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linux/tools/perf/builtin-stat.c
Paul Mackerras 9cffa8d533 perf_counter tools: Define and use our own u64, s64 etc. definitions 
On 64-bit powerpc, __u64 is defined to be unsigned long rather than
unsigned long long.  This causes compiler warnings every time we
print a __u64 value with %Lx.

Rather than changing __u64, we define our own u64 to be unsigned long
long on all architectures, and similarly s64 as signed long long.
For consistency we also define u32, s32, u16, s16, u8 and s8.  These
definitions are put in a new header, types.h, because these definitions
are needed in util/string.h and util/symbol.h.

The main change here is the mechanical change of __[us]{64,32,16,8}
to remove the "__".  The other changes are:

* Create types.h
* Include types.h in perf.h, util/string.h and util/symbol.h
* Add types.h to the LIB_H definition in Makefile
* Added (u64) casts in process_overflow_event() and print_sym_table()
  to kill two remaining warnings.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: benh@kernel.crashing.org
LKML-Reference: <19003.33494.495844.956580@cargo.ozlabs.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-19 18:25:47 +02:00

522 lines
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/*
* builtin-stat.c
*
* Builtin stat command: Give a precise performance counters summary
* overview about any workload, CPU or specific PID.
*
* Sample output:
$ perf stat ~/hackbench 10
Time: 0.104
Performance counter stats for '/home/mingo/hackbench':
1255.538611 task clock ticks # 10.143 CPU utilization factor
54011 context switches # 0.043 M/sec
385 CPU migrations # 0.000 M/sec
17755 pagefaults # 0.014 M/sec
3808323185 CPU cycles # 3033.219 M/sec
1575111190 instructions # 1254.530 M/sec
17367895 cache references # 13.833 M/sec
7674421 cache misses # 6.112 M/sec
Wall-clock time elapsed: 123.786620 msecs
*
* Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
*
* Improvements and fixes by:
*
* Arjan van de Ven <arjan@linux.intel.com>
* Yanmin Zhang <yanmin.zhang@intel.com>
* Wu Fengguang <fengguang.wu@intel.com>
* Mike Galbraith <efault@gmx.de>
* Paul Mackerras <paulus@samba.org>
*
* Released under the GPL v2. (and only v2, not any later version)
*/
#include "perf.h"
#include "builtin.h"
#include "util/util.h"
#include "util/parse-options.h"
#include "util/parse-events.h"
#include <sys/prctl.h>
#include <math.h>
static struct perf_counter_attr default_attrs[MAX_COUNTERS] = {
{ .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
{ .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES},
{ .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
{ .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES},
{ .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES },
};
static int system_wide = 0;
static int inherit = 1;
static int verbose = 0;
static int fd[MAX_NR_CPUS][MAX_COUNTERS];
static int target_pid = -1;
static int nr_cpus = 0;
static unsigned int page_size;
static int scale = 1;
static const unsigned int default_count[] = {
1000000,
1000000,
10000,
10000,
1000000,
10000,
};
#define MAX_RUN 100
static int run_count = 1;
static int run_idx = 0;
static u64 event_res[MAX_RUN][MAX_COUNTERS][3];
static u64 event_scaled[MAX_RUN][MAX_COUNTERS];
//static u64 event_hist[MAX_RUN][MAX_COUNTERS][3];
static u64 runtime_nsecs[MAX_RUN];
static u64 walltime_nsecs[MAX_RUN];
static u64 runtime_cycles[MAX_RUN];
static u64 event_res_avg[MAX_COUNTERS][3];
static u64 event_res_noise[MAX_COUNTERS][3];
static u64 event_scaled_avg[MAX_COUNTERS];
static u64 runtime_nsecs_avg;
static u64 runtime_nsecs_noise;
static u64 walltime_nsecs_avg;
static u64 walltime_nsecs_noise;
static u64 runtime_cycles_avg;
static u64 runtime_cycles_noise;
static void create_perf_stat_counter(int counter)
{
struct perf_counter_attr *attr = attrs + counter;
if (scale)
attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
PERF_FORMAT_TOTAL_TIME_RUNNING;
if (system_wide) {
int cpu;
for (cpu = 0; cpu < nr_cpus; cpu ++) {
fd[cpu][counter] = sys_perf_counter_open(attr, -1, cpu, -1, 0);
if (fd[cpu][counter] < 0 && verbose) {
printf("Error: counter %d, sys_perf_counter_open() syscall returned with %d (%s)\n", counter, fd[cpu][counter], strerror(errno));
}
}
} else {
attr->inherit = inherit;
attr->disabled = 1;
fd[0][counter] = sys_perf_counter_open(attr, 0, -1, -1, 0);
if (fd[0][counter] < 0 && verbose) {
printf("Error: counter %d, sys_perf_counter_open() syscall returned with %d (%s)\n", counter, fd[0][counter], strerror(errno));
}
}
}
/*
* Does the counter have nsecs as a unit?
*/
static inline int nsec_counter(int counter)
{
if (attrs[counter].type != PERF_TYPE_SOFTWARE)
return 0;
if (attrs[counter].config == PERF_COUNT_SW_CPU_CLOCK)
return 1;
if (attrs[counter].config == PERF_COUNT_SW_TASK_CLOCK)
return 1;
return 0;
}
/*
* Read out the results of a single counter:
*/
static void read_counter(int counter)
{
u64 *count, single_count[3];
ssize_t res;
int cpu, nv;
int scaled;
count = event_res[run_idx][counter];
count[0] = count[1] = count[2] = 0;
nv = scale ? 3 : 1;
for (cpu = 0; cpu < nr_cpus; cpu ++) {
if (fd[cpu][counter] < 0)
continue;
res = read(fd[cpu][counter], single_count, nv * sizeof(u64));
assert(res == nv * sizeof(u64));
close(fd[cpu][counter]);
fd[cpu][counter] = -1;
count[0] += single_count[0];
if (scale) {
count[1] += single_count[1];
count[2] += single_count[2];
}
}
scaled = 0;
if (scale) {
if (count[2] == 0) {
event_scaled[run_idx][counter] = -1;
count[0] = 0;
return;
}
if (count[2] < count[1]) {
event_scaled[run_idx][counter] = 1;
count[0] = (unsigned long long)
((double)count[0] * count[1] / count[2] + 0.5);
}
}
/*
* Save the full runtime - to allow normalization during printout:
*/
if (attrs[counter].type == PERF_TYPE_SOFTWARE &&
attrs[counter].config == PERF_COUNT_SW_TASK_CLOCK)
runtime_nsecs[run_idx] = count[0];
if (attrs[counter].type == PERF_TYPE_HARDWARE &&
attrs[counter].config == PERF_COUNT_HW_CPU_CYCLES)
runtime_cycles[run_idx] = count[0];
}
static int run_perf_stat(int argc, const char **argv)
{
unsigned long long t0, t1;
int status = 0;
int counter;
int pid;
if (!system_wide)
nr_cpus = 1;
for (counter = 0; counter < nr_counters; counter++)
create_perf_stat_counter(counter);
/*
* Enable counters and exec the command:
*/
t0 = rdclock();
prctl(PR_TASK_PERF_COUNTERS_ENABLE);
if ((pid = fork()) < 0)
perror("failed to fork");
if (!pid) {
if (execvp(argv[0], (char **)argv)) {
perror(argv[0]);
exit(-1);
}
}
wait(&status);
prctl(PR_TASK_PERF_COUNTERS_DISABLE);
t1 = rdclock();
walltime_nsecs[run_idx] = t1 - t0;
for (counter = 0; counter < nr_counters; counter++)
read_counter(counter);
return WEXITSTATUS(status);
}
static void print_noise(u64 *count, u64 *noise)
{
if (run_count > 1)
fprintf(stderr, " ( +- %7.3f%% )",
(double)noise[0]/(count[0]+1)*100.0);
}
static void nsec_printout(int counter, u64 *count, u64 *noise)
{
double msecs = (double)count[0] / 1000000;
fprintf(stderr, " %14.6f %-20s", msecs, event_name(counter));
if (attrs[counter].type == PERF_TYPE_SOFTWARE &&
attrs[counter].config == PERF_COUNT_SW_TASK_CLOCK) {
if (walltime_nsecs_avg)
fprintf(stderr, " # %10.3f CPUs ",
(double)count[0] / (double)walltime_nsecs_avg);
}
print_noise(count, noise);
}
static void abs_printout(int counter, u64 *count, u64 *noise)
{
fprintf(stderr, " %14Ld %-20s", count[0], event_name(counter));
if (runtime_cycles_avg &&
attrs[counter].type == PERF_TYPE_HARDWARE &&
attrs[counter].config == PERF_COUNT_HW_INSTRUCTIONS) {
fprintf(stderr, " # %10.3f IPC ",
(double)count[0] / (double)runtime_cycles_avg);
} else {
if (runtime_nsecs_avg) {
fprintf(stderr, " # %10.3f M/sec",
(double)count[0]/runtime_nsecs_avg*1000.0);
}
}
print_noise(count, noise);
}
/*
* Print out the results of a single counter:
*/
static void print_counter(int counter)
{
u64 *count, *noise;
int scaled;
count = event_res_avg[counter];
noise = event_res_noise[counter];
scaled = event_scaled_avg[counter];
if (scaled == -1) {
fprintf(stderr, " %14s %-20s\n",
"<not counted>", event_name(counter));
return;
}
if (nsec_counter(counter))
nsec_printout(counter, count, noise);
else
abs_printout(counter, count, noise);
if (scaled)
fprintf(stderr, " (scaled from %.2f%%)",
(double) count[2] / count[1] * 100);
fprintf(stderr, "\n");
}
/*
* normalize_noise noise values down to stddev:
*/
static void normalize_noise(u64 *val)
{
double res;
res = (double)*val / (run_count * sqrt((double)run_count));
*val = (u64)res;
}
static void update_avg(const char *name, int idx, u64 *avg, u64 *val)
{
*avg += *val;
if (verbose > 1)
fprintf(stderr, "debug: %20s[%d]: %Ld\n", name, idx, *val);
}
/*
* Calculate the averages and noises:
*/
static void calc_avg(void)
{
int i, j;
if (verbose > 1)
fprintf(stderr, "\n");
for (i = 0; i < run_count; i++) {
update_avg("runtime", 0, &runtime_nsecs_avg, runtime_nsecs + i);
update_avg("walltime", 0, &walltime_nsecs_avg, walltime_nsecs + i);
update_avg("runtime_cycles", 0, &runtime_cycles_avg, runtime_cycles + i);
for (j = 0; j < nr_counters; j++) {
update_avg("counter/0", j,
event_res_avg[j]+0, event_res[i][j]+0);
update_avg("counter/1", j,
event_res_avg[j]+1, event_res[i][j]+1);
update_avg("counter/2", j,
event_res_avg[j]+2, event_res[i][j]+2);
update_avg("scaled", j,
event_scaled_avg + j, event_scaled[i]+j);
}
}
runtime_nsecs_avg /= run_count;
walltime_nsecs_avg /= run_count;
runtime_cycles_avg /= run_count;
for (j = 0; j < nr_counters; j++) {
event_res_avg[j][0] /= run_count;
event_res_avg[j][1] /= run_count;
event_res_avg[j][2] /= run_count;
}
for (i = 0; i < run_count; i++) {
runtime_nsecs_noise +=
abs((s64)(runtime_nsecs[i] - runtime_nsecs_avg));
walltime_nsecs_noise +=
abs((s64)(walltime_nsecs[i] - walltime_nsecs_avg));
runtime_cycles_noise +=
abs((s64)(runtime_cycles[i] - runtime_cycles_avg));
for (j = 0; j < nr_counters; j++) {
event_res_noise[j][0] +=
abs((s64)(event_res[i][j][0] - event_res_avg[j][0]));
event_res_noise[j][1] +=
abs((s64)(event_res[i][j][1] - event_res_avg[j][1]));
event_res_noise[j][2] +=
abs((s64)(event_res[i][j][2] - event_res_avg[j][2]));
}
}
normalize_noise(&runtime_nsecs_noise);
normalize_noise(&walltime_nsecs_noise);
normalize_noise(&runtime_cycles_noise);
for (j = 0; j < nr_counters; j++) {
normalize_noise(&event_res_noise[j][0]);
normalize_noise(&event_res_noise[j][1]);
normalize_noise(&event_res_noise[j][2]);
}
}
static void print_stat(int argc, const char **argv)
{
int i, counter;
calc_avg();
fflush(stdout);
fprintf(stderr, "\n");
fprintf(stderr, " Performance counter stats for \'%s", argv[0]);
for (i = 1; i < argc; i++)
fprintf(stderr, " %s", argv[i]);
fprintf(stderr, "\'");
if (run_count > 1)
fprintf(stderr, " (%d runs)", run_count);
fprintf(stderr, ":\n\n");
for (counter = 0; counter < nr_counters; counter++)
print_counter(counter);
fprintf(stderr, "\n");
fprintf(stderr, " %14.9f seconds time elapsed.\n",
(double)walltime_nsecs_avg/1e9);
fprintf(stderr, "\n");
}
static volatile int signr = -1;
static void skip_signal(int signo)
{
signr = signo;
}
static void sig_atexit(void)
{
if (signr == -1)
return;
signal(signr, SIG_DFL);
kill(getpid(), signr);
}
static const char * const stat_usage[] = {
"perf stat [<options>] <command>",
NULL
};
static const struct option options[] = {
OPT_CALLBACK('e', "event", NULL, "event",
"event selector. use 'perf list' to list available events",
parse_events),
OPT_BOOLEAN('i', "inherit", &inherit,
"child tasks inherit counters"),
OPT_INTEGER('p', "pid", &target_pid,
"stat events on existing pid"),
OPT_BOOLEAN('a', "all-cpus", &system_wide,
"system-wide collection from all CPUs"),
OPT_BOOLEAN('S', "scale", &scale,
"scale/normalize counters"),
OPT_BOOLEAN('v', "verbose", &verbose,
"be more verbose (show counter open errors, etc)"),
OPT_INTEGER('r', "repeat", &run_count,
"repeat command and print average + stddev (max: 100)"),
OPT_END()
};
int cmd_stat(int argc, const char **argv, const char *prefix)
{
int status;
page_size = sysconf(_SC_PAGE_SIZE);
memcpy(attrs, default_attrs, sizeof(attrs));
argc = parse_options(argc, argv, options, stat_usage, 0);
if (!argc)
usage_with_options(stat_usage, options);
if (run_count <= 0 || run_count > MAX_RUN)
usage_with_options(stat_usage, options);
if (!nr_counters)
nr_counters = 8;
nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
assert(nr_cpus <= MAX_NR_CPUS);
assert(nr_cpus >= 0);
/*
* We dont want to block the signals - that would cause
* child tasks to inherit that and Ctrl-C would not work.
* What we want is for Ctrl-C to work in the exec()-ed
* task, but being ignored by perf stat itself:
*/
atexit(sig_atexit);
signal(SIGINT, skip_signal);
signal(SIGALRM, skip_signal);
signal(SIGABRT, skip_signal);
status = 0;
for (run_idx = 0; run_idx < run_count; run_idx++) {
if (run_count != 1 && verbose)
fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx+1);
status = run_perf_stat(argc, argv);
}
print_stat(argc, argv);
return status;
}
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