From: David Ahern Date: Wed, 9 Oct 2013 03:26:53 +0000 (-0600) Subject: perf trace: Add summary option to dump syscall statistics X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=bf2575c121ca11247ef07fd02b43f7430834f7b1;p=openwrt%2Fstaging%2Fblogic.git 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 Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/r/1381289214-24885-3-git-send-email-dsahern@gmail.com Signed-off-by: Arnaldo Carvalho de Melo --- 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 #include @@ -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);