From: Zhengyu He Date: Thu, 23 Jun 2011 20:45:42 +0000 (-0700) Subject: perf stat: Add noise output for csv mode X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=3ae9a34d747f9abf2bcc85dc0e77b951513ccdf2;p=openwrt%2Fstaging%2Fblogic.git perf stat: Add noise output for csv mode Previously, when you want perf-stat to output the statistics in csv mode, no information of the noise will be printed out. For example right now we output this --repeat information: ./perf stat -r3 -x, sleep 1 1.164789,task-clock 8,context-switches 0,CPU-migrations 219,page-faults 3337800,cycles With this patch, the output will be appended with an additional entry for the noise value: ./perf stat -r3 -x, sleep 1 1.164789,task-clock,3.75% 8,context-switches,75.00% 0,CPU-migrations,100.00% 219,page-faults,0.00% 3337800,cycles,3.36% Signed-off-by: Zhengyu He Cc: Paul Mackerras Cc: Arnaldo Carvalho de Melo Cc: Stephane Eranian Cc: Venkatesh Pallipadi Cc: Peter Zijlstra Cc: Frederic Weisbecker Link: http://lkml.kernel.org/r/1308861942-4945-1-git-send-email-zhengyuh@google.com Signed-off-by: Ingo Molnar --- diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index 784ed6d6e0d6..1d08c8084cc4 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -517,7 +517,10 @@ static void print_noise_pct(double total, double avg) if (avg) pct = 100.0*total/avg; - fprintf(stderr, " ( +-%6.2f%% )", pct); + if (csv_output) + fprintf(stderr, "%s%.2f%%", csv_sep, pct); + else + fprintf(stderr, " ( +-%6.2f%% )", pct); } static void print_noise(struct perf_evsel *evsel, double avg) @@ -882,13 +885,13 @@ static void print_counter_aggr(struct perf_evsel *counter) else abs_printout(-1, counter, avg); + print_noise(counter, avg); + if (csv_output) { fputc('\n', stderr); return; } - print_noise(counter, avg); - if (scaled) { double avg_enabled, avg_running;