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perf trace: Add summary option to dump syscall statistics
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>
This commit is contained in:
David Ahern
Arnaldo Carvalho de Melo
parent
813335b8b2
commit
bf2575c121
@ -93,6 +93,10 @@ the thread executes on the designated CPUs. Default is to monitor all CPUs.
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--comm::
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Show process COMM right beside its ID, on by default, disable with --no-comm.
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--summary::
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Show a summary of syscalls by thread with min, max, and average times (in
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msec) and relative stddev.
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SEE ALSO
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--------
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linkperf:perf-record[1], linkperf:perf-script[1]
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@ -10,6 +10,7 @@
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#include "util/strlist.h"
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#include "util/intlist.h"
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#include "util/thread_map.h"
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#include "util/stat.h"
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#include <libaudit.h>
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#include <stdlib.h>
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@ -909,6 +910,8 @@ struct thread_trace {
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int max;
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char **table;
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} paths;
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struct intlist *syscall_stats;
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};
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static struct thread_trace *thread_trace__new(void)
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@ -918,6 +921,8 @@ static struct thread_trace *thread_trace__new(void)
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if (ttrace)
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ttrace->paths.max = -1;
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ttrace->syscall_stats = intlist__new(NULL);
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return ttrace;
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}
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@ -964,6 +969,7 @@ struct trace {
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struct intlist *pid_list;
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bool sched;
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bool multiple_threads;
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bool summary;
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bool show_comm;
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double duration_filter;
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double runtime_ms;
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@ -1291,10 +1297,8 @@ typedef int (*tracepoint_handler)(struct trace *trace, struct perf_evsel *evsel,
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struct perf_sample *sample);
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static struct syscall *trace__syscall_info(struct trace *trace,
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struct perf_evsel *evsel,
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struct perf_sample *sample)
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struct perf_evsel *evsel, int id)
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{
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int id = perf_evsel__intval(evsel, sample, "id");
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if (id < 0) {
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@ -1335,6 +1339,32 @@ out_cant_read:
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return NULL;
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}
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static void thread__update_stats(struct thread_trace *ttrace,
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int id, struct perf_sample *sample)
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{
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struct int_node *inode;
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struct stats *stats;
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u64 duration = 0;
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inode = intlist__findnew(ttrace->syscall_stats, id);
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if (inode == NULL)
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return;
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stats = inode->priv;
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if (stats == NULL) {
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stats = malloc(sizeof(struct stats));
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if (stats == NULL)
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return;
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init_stats(stats);
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inode->priv = stats;
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}
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if (ttrace->entry_time && sample->time > ttrace->entry_time)
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duration = sample->time - ttrace->entry_time;
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update_stats(stats, duration);
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}
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static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel,
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struct perf_sample *sample)
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{
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@ -1342,7 +1372,8 @@ static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel,
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void *args;
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size_t printed = 0;
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struct thread *thread;
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struct syscall *sc = trace__syscall_info(trace, evsel, sample);
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int id = perf_evsel__intval(evsel, sample, "id");
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struct syscall *sc = trace__syscall_info(trace, evsel, id);
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struct thread_trace *ttrace;
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if (sc == NULL)
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@ -1394,7 +1425,8 @@ static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
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int ret;
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u64 duration = 0;
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struct thread *thread;
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struct syscall *sc = trace__syscall_info(trace, evsel, sample);
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int id = perf_evsel__intval(evsel, sample, "id");
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struct syscall *sc = trace__syscall_info(trace, evsel, id);
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struct thread_trace *ttrace;
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if (sc == NULL)
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@ -1408,6 +1440,9 @@ static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
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if (ttrace == NULL)
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return -1;
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if (trace->summary)
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thread__update_stats(ttrace, id, sample);
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ret = perf_evsel__intval(evsel, sample, "ret");
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ttrace = thread->priv;
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@ -1574,6 +1609,8 @@ static int trace__record(int argc, const char **argv)
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return cmd_record(i, rec_argv, NULL);
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}
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static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);
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static int trace__run(struct trace *trace, int argc, const char **argv)
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{
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struct perf_evlist *evlist = perf_evlist__new();
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@ -1703,6 +1740,9 @@ again:
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goto again;
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out_unmap_evlist:
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if (!err && trace->summary)
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trace__fprintf_thread_summary(trace, trace->output);
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perf_evlist__munmap(evlist);
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out_close_evlist:
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perf_evlist__close(evlist);
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@ -1798,6 +1838,9 @@ static int trace__replay(struct trace *trace)
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if (err)
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pr_err("Failed to process events, error %d", err);
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else if (trace->summary)
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trace__fprintf_thread_summary(trace, trace->output);
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out:
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perf_session__delete(session);
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@ -1808,10 +1851,53 @@ static size_t trace__fprintf_threads_header(FILE *fp)
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{
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size_t printed;
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printed = fprintf(fp, "\n _____________________________________________________________________\n");
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printed += fprintf(fp," __) Summary of events (__\n\n");
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printed += fprintf(fp," [ task - pid ] [ events ] [ ratio ] [ runtime ]\n");
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printed += fprintf(fp," _____________________________________________________________________\n\n");
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printed = fprintf(fp, "\n _____________________________________________________________________________\n");
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printed += fprintf(fp, " __) Summary of events (__\n\n");
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printed += fprintf(fp, " [ task - pid ] [ events ] [ ratio ] [ runtime ]\n");
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printed += fprintf(fp, " syscall count min max avg stddev\n");
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printed += fprintf(fp, " msec msec msec %%\n");
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printed += fprintf(fp, " _____________________________________________________________________________\n\n");
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return printed;
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}
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static size_t thread__dump_stats(struct thread_trace *ttrace,
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struct trace *trace, FILE *fp)
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{
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struct stats *stats;
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size_t printed = 0;
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struct syscall *sc;
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struct int_node *inode = intlist__first(ttrace->syscall_stats);
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if (inode == NULL)
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return 0;
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printed += fprintf(fp, "\n");
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/* each int_node is a syscall */
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while (inode) {
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stats = inode->priv;
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if (stats) {
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double min = (double)(stats->min) / NSEC_PER_MSEC;
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double max = (double)(stats->max) / NSEC_PER_MSEC;
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double avg = avg_stats(stats);
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double pct;
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u64 n = (u64) stats->n;
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pct = avg ? 100.0 * stddev_stats(stats)/avg : 0.0;
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avg /= NSEC_PER_MSEC;
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sc = &trace->syscalls.table[inode->i];
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printed += fprintf(fp, "%24s %14s : ", "", sc->name);
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printed += fprintf(fp, "%5" PRIu64 " %8.3f %8.3f",
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n, min, max);
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printed += fprintf(fp, " %8.3f %6.2f\n", avg, pct);
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}
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inode = intlist__next(inode);
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}
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printed += fprintf(fp, "\n\n");
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return printed;
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}
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@ -1850,6 +1936,7 @@ static int trace__fprintf_one_thread(struct thread *thread, void *priv)
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printed += fprintf(fp, " - %-5d :%11lu [", thread->tid, ttrace->nr_events);
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printed += color_fprintf(fp, color, "%5.1f%%", ratio);
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printed += fprintf(fp, " ] %10.3f ms\n", ttrace->runtime_ms);
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printed += thread__dump_stats(ttrace, trace, fp);
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data->printed += printed;
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@ -1953,6 +2040,8 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
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OPT_INCR('v', "verbose", &verbose, "be more verbose"),
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OPT_BOOLEAN('T', "time", &trace.full_time,
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"Show full timestamp, not time relative to first start"),
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OPT_BOOLEAN(0, "summary", &trace.summary,
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"Show syscall summary with statistics"),
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OPT_END()
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};
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int err;
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@ -2008,9 +2097,6 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
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else
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err = trace__run(&trace, argc, argv);
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if (trace.sched && !err)
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trace__fprintf_thread_summary(&trace, trace.output);
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out_close:
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if (output_name != NULL)
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fclose(trace.output);
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