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-rw-r--r--tools/perf/builtin-stat.c179
1 files changed, 125 insertions, 54 deletions
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 95db31cff6f..9a39ca3c3ac 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -46,9 +46,11 @@
#include "util/debug.h"
#include "util/header.h"
#include "util/cpumap.h"
+#include "util/thread.h"
#include <sys/prctl.h>
#include <math.h>
+#include <locale.h>
static struct perf_event_attr default_attrs[] = {
@@ -66,18 +68,23 @@ static struct perf_event_attr default_attrs[] = {
};
-static int system_wide = 0;
+static bool system_wide = false;
static unsigned int nr_cpus = 0;
static int run_idx = 0;
static int run_count = 1;
-static int inherit = 1;
-static int scale = 1;
+static bool no_inherit = false;
+static bool scale = true;
static pid_t target_pid = -1;
+static pid_t target_tid = -1;
+static pid_t *all_tids = NULL;
+static int thread_num = 0;
static pid_t child_pid = -1;
-static int null_run = 0;
+static bool null_run = false;
+static bool big_num = false;
-static int fd[MAX_NR_CPUS][MAX_COUNTERS];
+
+static int *fd[MAX_NR_CPUS][MAX_COUNTERS];
static int event_scaled[MAX_COUNTERS];
@@ -140,9 +147,11 @@ struct stats runtime_branches_stats;
#define ERR_PERF_OPEN \
"Error: counter %d, sys_perf_event_open() syscall returned with %d (%s)\n"
-static void create_perf_stat_counter(int counter, int pid)
+static int create_perf_stat_counter(int counter)
{
struct perf_event_attr *attr = attrs + counter;
+ int thread;
+ int ncreated = 0;
if (scale)
attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
@@ -152,21 +161,33 @@ static void create_perf_stat_counter(int counter, int pid)
unsigned int cpu;
for (cpu = 0; cpu < nr_cpus; cpu++) {
- fd[cpu][counter] = sys_perf_event_open(attr, -1, cpumap[cpu], -1, 0);
- if (fd[cpu][counter] < 0 && verbose)
- fprintf(stderr, ERR_PERF_OPEN, counter,
- fd[cpu][counter], strerror(errno));
+ fd[cpu][counter][0] = sys_perf_event_open(attr,
+ -1, cpumap[cpu], -1, 0);
+ if (fd[cpu][counter][0] < 0)
+ pr_debug(ERR_PERF_OPEN, counter,
+ fd[cpu][counter][0], strerror(errno));
+ else
+ ++ncreated;
}
} else {
- attr->inherit = inherit;
- attr->disabled = 1;
- attr->enable_on_exec = 1;
-
- fd[0][counter] = sys_perf_event_open(attr, pid, -1, -1, 0);
- if (fd[0][counter] < 0 && verbose)
- fprintf(stderr, ERR_PERF_OPEN, counter,
- fd[0][counter], strerror(errno));
+ attr->inherit = !no_inherit;
+ if (target_pid == -1 && target_tid == -1) {
+ attr->disabled = 1;
+ attr->enable_on_exec = 1;
+ }
+ for (thread = 0; thread < thread_num; thread++) {
+ fd[0][counter][thread] = sys_perf_event_open(attr,
+ all_tids[thread], -1, -1, 0);
+ if (fd[0][counter][thread] < 0)
+ pr_debug(ERR_PERF_OPEN, counter,
+ fd[0][counter][thread],
+ strerror(errno));
+ else
+ ++ncreated;
+ }
}
+
+ return ncreated;
}
/*
@@ -190,25 +211,28 @@ static void read_counter(int counter)
unsigned int cpu;
size_t res, nv;
int scaled;
- int i;
+ int i, thread;
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];
+ for (thread = 0; thread < thread_num; thread++) {
+ if (fd[cpu][counter][thread] < 0)
+ continue;
+
+ res = read(fd[cpu][counter][thread],
+ single_count, nv * sizeof(u64));
+ assert(res == nv * sizeof(u64));
+
+ close(fd[cpu][counter][thread]);
+ fd[cpu][counter][thread] = -1;
+
+ count[0] += single_count[0];
+ if (scale) {
+ count[1] += single_count[1];
+ count[2] += single_count[2];
+ }
}
}
@@ -250,10 +274,9 @@ static int run_perf_stat(int argc __used, const char **argv)
{
unsigned long long t0, t1;
int status = 0;
- int counter;
- int pid = target_pid;
+ int counter, ncreated = 0;
int child_ready_pipe[2], go_pipe[2];
- const bool forks = (target_pid == -1 && argc > 0);
+ const bool forks = (argc > 0);
char buf;
if (!system_wide)
@@ -265,10 +288,10 @@ static int run_perf_stat(int argc __used, const char **argv)
}
if (forks) {
- if ((pid = fork()) < 0)
+ if ((child_pid = fork()) < 0)
perror("failed to fork");
- if (!pid) {
+ if (!child_pid) {
close(child_ready_pipe[0]);
close(go_pipe[1]);
fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
@@ -297,7 +320,8 @@ static int run_perf_stat(int argc __used, const char **argv)
exit(-1);
}
- child_pid = pid;
+ if (target_tid == -1 && target_pid == -1 && !system_wide)
+ all_tids[0] = child_pid;
/*
* Wait for the child to be ready to exec.
@@ -310,7 +334,16 @@ static int run_perf_stat(int argc __used, const char **argv)
}
for (counter = 0; counter < nr_counters; counter++)
- create_perf_stat_counter(counter, pid);
+ ncreated += create_perf_stat_counter(counter);
+
+ if (ncreated == 0) {
+ pr_err("No permission to collect %sstats.\n"
+ "Consider tweaking /proc/sys/kernel/perf_event_paranoid.\n",
+ system_wide ? "system-wide " : "");
+ if (child_pid != -1)
+ kill(child_pid, SIGTERM);
+ return -1;
+ }
/*
* Enable counters and exec the command:
@@ -321,7 +354,7 @@ static int run_perf_stat(int argc __used, const char **argv)
close(go_pipe[1]);
wait(&status);
} else {
- while(!done);
+ while(!done) sleep(1);
}
t1 = rdclock();
@@ -347,7 +380,7 @@ static void nsec_printout(int counter, double avg)
{
double msecs = avg / 1e6;
- fprintf(stderr, " %14.6f %-24s", msecs, event_name(counter));
+ fprintf(stderr, " %18.6f %-24s", msecs, event_name(counter));
if (MATCH_EVENT(SOFTWARE, SW_TASK_CLOCK, counter)) {
fprintf(stderr, " # %10.3f CPUs ",
@@ -359,7 +392,10 @@ static void abs_printout(int counter, double avg)
{
double total, ratio = 0.0;
- fprintf(stderr, " %14.0f %-24s", avg, event_name(counter));
+ if (big_num)
+ fprintf(stderr, " %'18.0f %-24s", avg, event_name(counter));
+ else
+ fprintf(stderr, " %18.0f %-24s", avg, event_name(counter));
if (MATCH_EVENT(HARDWARE, HW_INSTRUCTIONS, counter)) {
total = avg_stats(&runtime_cycles_stats);
@@ -396,7 +432,7 @@ static void print_counter(int counter)
int scaled = event_scaled[counter];
if (scaled == -1) {
- fprintf(stderr, " %14s %-24s\n",
+ fprintf(stderr, " %18s %-24s\n",
"<not counted>", event_name(counter));
return;
}
@@ -429,12 +465,14 @@ static void print_stat(int argc, const char **argv)
fprintf(stderr, "\n");
fprintf(stderr, " Performance counter stats for ");
- if(target_pid == -1) {
+ if(target_pid == -1 && target_tid == -1) {
fprintf(stderr, "\'%s", argv[0]);
for (i = 1; i < argc; i++)
fprintf(stderr, " %s", argv[i]);
- }else
- fprintf(stderr, "task pid \'%d", target_pid);
+ } else if (target_pid != -1)
+ fprintf(stderr, "process id \'%d", target_pid);
+ else
+ fprintf(stderr, "thread id \'%d", target_tid);
fprintf(stderr, "\'");
if (run_count > 1)
@@ -445,7 +483,7 @@ static void print_stat(int argc, const char **argv)
print_counter(counter);
fprintf(stderr, "\n");
- fprintf(stderr, " %14.9f seconds time elapsed",
+ fprintf(stderr, " %18.9f seconds time elapsed",
avg_stats(&walltime_nsecs_stats)/1e9);
if (run_count > 1) {
fprintf(stderr, " ( +- %7.3f%% )",
@@ -459,7 +497,7 @@ static volatile int signr = -1;
static void skip_signal(int signo)
{
- if(target_pid != -1)
+ if(child_pid == -1)
done = 1;
signr = signo;
@@ -486,30 +524,37 @@ 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_BOOLEAN('i', "no-inherit", &no_inherit,
+ "child tasks do not inherit counters"),
OPT_INTEGER('p', "pid", &target_pid,
- "stat events on existing pid"),
+ "stat events on existing process id"),
+ OPT_INTEGER('t', "tid", &target_tid,
+ "stat events on existing thread id"),
OPT_BOOLEAN('a', "all-cpus", &system_wide,
"system-wide collection from all CPUs"),
OPT_BOOLEAN('c', "scale", &scale,
"scale/normalize counters"),
- OPT_BOOLEAN('v', "verbose", &verbose,
+ OPT_INCR('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_BOOLEAN('n', "null", &null_run,
"null run - dont start any counters"),
+ OPT_BOOLEAN('B', "big-num", &big_num,
+ "print large numbers with thousands\' separators"),
OPT_END()
};
int cmd_stat(int argc, const char **argv, const char *prefix __used)
{
int status;
+ int i,j;
+
+ setlocale(LC_ALL, "");
argc = parse_options(argc, argv, options, stat_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
- if (!argc && target_pid == -1)
+ if (!argc && target_pid == -1 && target_tid == -1)
usage_with_options(stat_usage, options);
if (run_count <= 0)
usage_with_options(stat_usage, options);
@@ -525,6 +570,31 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used)
else
nr_cpus = 1;
+ if (target_pid != -1) {
+ target_tid = target_pid;
+ thread_num = find_all_tid(target_pid, &all_tids);
+ if (thread_num <= 0) {
+ fprintf(stderr, "Can't find all threads of pid %d\n",
+ target_pid);
+ usage_with_options(stat_usage, options);
+ }
+ } else {
+ all_tids=malloc(sizeof(pid_t));
+ if (!all_tids)
+ return -ENOMEM;
+
+ all_tids[0] = target_tid;
+ thread_num = 1;
+ }
+
+ for (i = 0; i < MAX_NR_CPUS; i++) {
+ for (j = 0; j < MAX_COUNTERS; j++) {
+ fd[i][j] = malloc(sizeof(int)*thread_num);
+ if (!fd[i][j])
+ return -ENOMEM;
+ }
+ }
+
/*
* We dont want to block the signals - that would cause
* child tasks to inherit that and Ctrl-C would not work.
@@ -543,7 +613,8 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used)
status = run_perf_stat(argc, argv);
}
- print_stat(argc, argv);
+ if (status != -1)
+ print_stat(argc, argv);
return status;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-03 18:35:39 +0000