Eric Lee / linux-smarc-t335x-v3.2

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Commit 3ae9a34d747f9abf2bcc85dc0e77b951513ccdf2

Authored by Zhengyu He
Committed by Ingo Molnar
1 parent 343a031f3c
Exists in master and in 4 other branches v3.2_AM335xPSP_04.06.00.11, v3.2_NEWT335xPSP_04.06.00.11, v3.2_SBC_SMARTMEN, v3.2_SMARCT335xPSP_04.06.00.11

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 <zhengyuh@google.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Stephane Eranian <eranian@google.com>
Cc: Venkatesh Pallipadi <venki@google.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/1308861942-4945-1-git-send-email-zhengyuh@google.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>

Showing 1 changed file with 6 additions and 3 deletions Side-by-side Diff

tools/perf/builtin-stat.c
Diff comments   View file @ 3ae9a34
... ... @@ -517,7 +517,10 @@
517 517 if (avg)
518 518 pct = 100.0*total/avg;
519 519  
520   - fprintf(stderr, " ( +-%6.2f%% )", pct);
  520 + if (csv_output)
  521 + fprintf(stderr, "%s%.2f%%", csv_sep, pct);
  522 + else
  523 + fprintf(stderr, " ( +-%6.2f%% )", pct);
521 524 }
522 525  
523 526 static void print_noise(struct perf_evsel *evsel, double avg)
524 527  
... ... @@ -882,12 +885,12 @@
882 885 else
883 886 abs_printout(-1, counter, avg);
884 887  
  888 + print_noise(counter, avg);
  889 +
885 890 if (csv_output) {
886 891 fputc('\n', stderr);
887 892 return;
888 893 }
889   -
890   - print_noise(counter, avg);
891 894  
892 895 if (scaled) {
893 896 double avg_enabled, avg_running;