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perf stat: Fix CVS output format for non-supported counters 

When printing stats in CSV mode, 'perf stat' appends extra separators
when a counter is not supported:

<not supported>,,L1-dcache-store-misses,mesos/bd442f34-2b4a-47df-b966-9b281f9f56fc,0,100.00,,,,

Which causes a failure when parsing fields. The numbers of separators
should be the same for each line, no matter if the counter is or not
supported.

Signed-off-by: Ilya Pronin <ipronin@twitter.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/20180306064353.31930-1-xiyou.wangcong@gmail.com
Fixes: 92a61f6412 ("perf stat: Implement CSV metrics output")
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ilya Pronin 2018-03-05 22:43:53 -08:00 committed by Arnaldo Carvalho de Melo
parent 4caea0574c
commit 40c21898ba
1 changed files with 1 additions and 1 deletions
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2
tools/perf/builtin-stat.c
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@ -917,7 +917,7 @@ static void print_metric_csv(void *ctx,
char buf[64], *vals, *ends;
if (unit == NULL || fmt == NULL) {
fprintf(out, "%s%s%s%s", csv_sep, csv_sep, csv_sep, csv_sep);
fprintf(out, "%s%s", csv_sep, csv_sep);
return;
}
snprintf(buf, sizeof(buf), fmt, val);