From 03548ebf6d8cc8a3a782121cf3e54ea41230e227 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Thu, 5 May 2016 15:46:50 -0300 Subject: [PATCH] perf trace: Do not show the runtime_ms for a thread when not collecting it That field is only updated when we use the "sched:sched_stat_runtime" tracepoint, and that is only done so far when we use the '--stat' command line option, without it we get just zeros, confusing the users: Without this patch: # trace -a -s sleep 1 qemu-system-x86 (9931), 468 events, 9.6%, 0.000 msec syscall calls total min avg max stddev (msec) (msec) (msec) (msec) (%) ---------- ------ --------- --------- --------- --------- ------ ppoll 98 982.374 0.000 10.024 29.983 12.65% write 34 0.401 0.005 0.012 0.027 5.49% ioctl 102 0.347 0.002 0.003 0.007 3.08% firefox (10871), 1856 events, 38.2%, 0.000 msec (msec) (msec) (msec) (msec) (%) ---------- ------ --------- --------- --------- --------- ------ poll 395 934.873 0.000 2.367 17.120 11.51% recvmsg 395 0.988 0.001 0.003 0.021 4.20% read 106 0.460 0.002 0.004 0.007 3.17% futex 24 0.108 0.001 0.004 0.010 10.05% mmap 2 0.041 0.016 0.021 0.026 23.92% write 6 0.027 0.004 0.004 0.005 2.52% After this patch that ', 0.000 msecs' gets suppressed when --stat is not in use. Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Milian Wolff Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-p7emqrsw7900tdkg43v9l1e1@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-trace.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index c61e61240b3b..66aa2a00414b 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -2860,7 +2860,11 @@ static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trac printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj); if (ttrace->pfmin) printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin); - printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms); + if (trace->sched) + printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms); + else if (fputc('\n', fp) != EOF) + ++printed; + printed += thread__dump_stats(ttrace, trace, fp); return printed; -- 2.39.2