summaryrefslogtreecommitdiff
path: root/tools/perf/util/stat.c
diff options
context:
space:
mode:
authorDavid Ahern <dsahern@gmail.com>2013-08-03 00:05:40 +0400
committerArnaldo Carvalho de Melo <acme@redhat.com>2013-08-08 00:35:26 +0400
commitffe4f3c0d109dc53e1b3448ac457052107f34a84 (patch)
tree18ada0ac819b95198a16764fa8eea7e082a09a44 /tools/perf/util/stat.c
parent42ee8c61cb1b7fe7b7ad5071bfb3c609cb0620ca (diff)
downloadlinux-ffe4f3c0d109dc53e1b3448ac457052107f34a84.tar.xz
perf stats: Add max and min stats
Need an initialization function to set min to -1 to differentiate from an actual min of 0. Signed-off-by: David Ahern <dsahern@gmail.com> Reviewed-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Runzhen Wang <runzhen@linux.vnet.ibm.com> Cc: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/1375473947-64285-3-git-send-email-dsahern@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/stat.c')
-rw-r--r--tools/perf/util/stat.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c
index 7c59c28afcc5..6506b3dfb605 100644
--- a/tools/perf/util/stat.c
+++ b/tools/perf/util/stat.c
@@ -10,6 +10,12 @@ void update_stats(struct stats *stats, u64 val)
delta = val - stats->mean;
stats->mean += delta / stats->n;
stats->M2 += delta*(val - stats->mean);
+
+ if (val > stats->max)
+ stats->max = val;
+
+ if (val < stats->min)
+ stats->min = val;
}
double avg_stats(struct stats *stats)