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Subject[PATCH 140/161] perf trace: Add summary option to dump syscall statistics
Date
From: David Ahern <dsahern@gmail.com>

When enabled dumps a summary of all syscalls by task with the usual
statistics -- min, max, average and relative stddev. For example,

make - 26341 : 3344 [ 17.4% ] 0.000 ms

read : 52 0.000 4.802 0.644 30.08
write : 20 0.004 0.036 0.010 21.72
open : 24 0.003 0.046 0.014 23.68
close : 64 0.002 0.055 0.008 22.53
stat : 2714 0.002 0.222 0.004 4.47
fstat : 18 0.001 0.041 0.006 46.26
mmap : 30 0.003 0.009 0.006 5.71
mprotect : 8 0.006 0.039 0.016 32.16
munmap : 12 0.007 0.077 0.020 38.25
brk : 48 0.002 0.014 0.004 10.18
rt_sigaction : 18 0.002 0.002 0.002 2.11
rt_sigprocmask : 60 0.002 0.128 0.010 32.88
access : 2 0.006 0.006 0.006 0.00
pipe : 12 0.004 0.048 0.013 35.98
vfork : 34 0.448 0.980 0.692 3.04
execve : 20 0.000 0.387 0.046 56.66
wait4 : 34 0.017 9923.287 593.221 68.45
fcntl : 8 0.001 0.041 0.013 48.79
getdents : 48 0.002 0.079 0.013 19.62
getcwd : 2 0.005 0.005 0.005 0.00
chdir : 2 0.070 0.070 0.070 0.00
getrlimit : 2 0.045 0.045 0.045 0.00
arch_prctl : 2 0.002 0.002 0.002 0.00
setrlimit : 2 0.002 0.002 0.002 0.00
openat : 94 0.003 0.005 0.003 2.11

Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1381289214-24885-3-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/Documentation/perf-trace.txt | 4 ++
tools/perf/builtin-trace.c | 110 ++++++++++++++++++++++++++++----
2 files changed, 102 insertions(+), 12 deletions(-)

diff --git a/tools/perf/Documentation/perf-trace.txt b/tools/perf/Documentation/perf-trace.txt
index 1a224862118f..54139c6457f8 100644
--- a/tools/perf/Documentation/perf-trace.txt
+++ b/tools/perf/Documentation/perf-trace.txt
@@ -93,6 +93,10 @@ the thread executes on the designated CPUs. Default is to monitor all CPUs.
--comm::
Show process COMM right beside its ID, on by default, disable with --no-comm.

+--summary::
+ Show a summary of syscalls by thread with min, max, and average times (in
+ msec) and relative stddev.
+
SEE ALSO
--------
linkperf:perf-record[1], linkperf:perf-script[1]
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 5496546b7c5c..d0f91fe755a3 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -10,6 +10,7 @@
#include "util/strlist.h"
#include "util/intlist.h"
#include "util/thread_map.h"
+#include "util/stat.h"

#include <libaudit.h>
#include <stdlib.h>
@@ -909,6 +910,8 @@ struct thread_trace {
int max;
char **table;
} paths;
+
+ struct intlist *syscall_stats;
};

static struct thread_trace *thread_trace__new(void)
@@ -918,6 +921,8 @@ static struct thread_trace *thread_trace__new(void)
if (ttrace)
ttrace->paths.max = -1;

+ ttrace->syscall_stats = intlist__new(NULL);
+
return ttrace;
}

@@ -964,6 +969,7 @@ struct trace {
struct intlist *pid_list;
bool sched;
bool multiple_threads;
+ bool summary;
bool show_comm;
double duration_filter;
double runtime_ms;
@@ -1291,10 +1297,8 @@ typedef int (*tracepoint_handler)(struct trace *trace, struct perf_evsel *evsel,
struct perf_sample *sample);

static struct syscall *trace__syscall_info(struct trace *trace,
- struct perf_evsel *evsel,
- struct perf_sample *sample)
+ struct perf_evsel *evsel, int id)
{
- int id = perf_evsel__intval(evsel, sample, "id");

if (id < 0) {

@@ -1335,6 +1339,32 @@ out_cant_read:
return NULL;
}

+static void thread__update_stats(struct thread_trace *ttrace,
+ int id, struct perf_sample *sample)
+{
+ struct int_node *inode;
+ struct stats *stats;
+ u64 duration = 0;
+
+ inode = intlist__findnew(ttrace->syscall_stats, id);
+ if (inode == NULL)
+ return;
+
+ stats = inode->priv;
+ if (stats == NULL) {
+ stats = malloc(sizeof(struct stats));
+ if (stats == NULL)
+ return;
+ init_stats(stats);
+ inode->priv = stats;
+ }
+
+ if (ttrace->entry_time && sample->time > ttrace->entry_time)
+ duration = sample->time - ttrace->entry_time;
+
+ update_stats(stats, duration);
+}
+
static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel,
struct perf_sample *sample)
{
@@ -1342,7 +1372,8 @@ static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel,
void *args;
size_t printed = 0;
struct thread *thread;
- struct syscall *sc = trace__syscall_info(trace, evsel, sample);
+ int id = perf_evsel__intval(evsel, sample, "id");
+ struct syscall *sc = trace__syscall_info(trace, evsel, id);
struct thread_trace *ttrace;

if (sc == NULL)
@@ -1394,7 +1425,8 @@ static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
int ret;
u64 duration = 0;
struct thread *thread;
- struct syscall *sc = trace__syscall_info(trace, evsel, sample);
+ int id = perf_evsel__intval(evsel, sample, "id");
+ struct syscall *sc = trace__syscall_info(trace, evsel, id);
struct thread_trace *ttrace;

if (sc == NULL)
@@ -1408,6 +1440,9 @@ static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
if (ttrace == NULL)
return -1;

+ if (trace->summary)
+ thread__update_stats(ttrace, id, sample);
+
ret = perf_evsel__intval(evsel, sample, "ret");

ttrace = thread->priv;
@@ -1574,6 +1609,8 @@ static int trace__record(int argc, const char **argv)
return cmd_record(i, rec_argv, NULL);
}

+static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
+
static int trace__run(struct trace *trace, int argc, const char **argv)
{
struct perf_evlist *evlist = perf_evlist__new();
@@ -1703,6 +1740,9 @@ again:
goto again;

out_unmap_evlist:
+ if (!err && trace->summary)
+ trace__fprintf_thread_summary(trace, trace->output);
+
perf_evlist__munmap(evlist);
out_close_evlist:
perf_evlist__close(evlist);
@@ -1798,6 +1838,9 @@ static int trace__replay(struct trace *trace)
if (err)
pr_err("Failed to process events, error %d", err);

+ else if (trace->summary)
+ trace__fprintf_thread_summary(trace, trace->output);
+
out:
perf_session__delete(session);

@@ -1808,10 +1851,53 @@ static size_t trace__fprintf_threads_header(FILE *fp)
{
size_t printed;

- printed = fprintf(fp, "\n _____________________________________________________________________\n");
- printed += fprintf(fp," __) Summary of events (__\n\n");
- printed += fprintf(fp," [ task - pid ] [ events ] [ ratio ] [ runtime ]\n");
- printed += fprintf(fp," _____________________________________________________________________\n\n");
+ printed = fprintf(fp, "\n _____________________________________________________________________________\n");
+ printed += fprintf(fp, " __) Summary of events (__\n\n");
+ printed += fprintf(fp, " [ task - pid ] [ events ] [ ratio ] [ runtime ]\n");
+ printed += fprintf(fp, " syscall count min max avg stddev\n");
+ printed += fprintf(fp, " msec msec msec %%\n");
+ printed += fprintf(fp, " _____________________________________________________________________________\n\n");
+
+ return printed;
+}
+
+static size_t thread__dump_stats(struct thread_trace *ttrace,
+ struct trace *trace, FILE *fp)
+{
+ struct stats *stats;
+ size_t printed = 0;
+ struct syscall *sc;
+ struct int_node *inode = intlist__first(ttrace->syscall_stats);
+
+ if (inode == NULL)
+ return 0;
+
+ printed += fprintf(fp, "\n");
+
+ /* each int_node is a syscall */
+ while (inode) {
+ stats = inode->priv;
+ if (stats) {
+ double min = (double)(stats->min) / NSEC_PER_MSEC;
+ double max = (double)(stats->max) / NSEC_PER_MSEC;
+ double avg = avg_stats(stats);
+ double pct;
+ u64 n = (u64) stats->n;
+
+ pct = avg ? 100.0 * stddev_stats(stats)/avg : 0.0;
+ avg /= NSEC_PER_MSEC;
+
+ sc = &trace->syscalls.table[inode->i];
+ printed += fprintf(fp, "%24s %14s : ", "", sc->name);
+ printed += fprintf(fp, "%5" PRIu64 " %8.3f %8.3f",
+ n, min, max);
+ printed += fprintf(fp, " %8.3f %6.2f\n", avg, pct);
+ }
+
+ inode = intlist__next(inode);
+ }
+
+ printed += fprintf(fp, "\n\n");

return printed;
}
@@ -1850,6 +1936,7 @@ static int trace__fprintf_one_thread(struct thread *thread, void *priv)
printed += fprintf(fp, " - %-5d :%11lu [", thread->tid, ttrace->nr_events);
printed += color_fprintf(fp, color, "%5.1f%%", ratio);
printed += fprintf(fp, " ] %10.3f ms\n", ttrace->runtime_ms);
+ printed += thread__dump_stats(ttrace, trace, fp);

data->printed += printed;

@@ -1953,6 +2040,8 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
OPT_INCR('v', "verbose", &verbose, "be more verbose"),
OPT_BOOLEAN('T', "time", &trace.full_time,
"Show full timestamp, not time relative to first start"),
+ OPT_BOOLEAN(0, "summary", &trace.summary,
+ "Show syscall summary with statistics"),
OPT_END()
};
int err;
@@ -2008,9 +2097,6 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
else
err = trace__run(&trace, argc, argv);

- if (trace.sched && !err)
- trace__fprintf_thread_summary(&trace, trace.output);
-
out_close:
if (output_name != NULL)
fclose(trace.output);
--
1.8.1.4


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