From 7425664bbd3174814500c7ab8740cbb9bb25396c Mon Sep 17 00:00:00 2001
From: Jin Yao <yao.jin@linux.intel.com>
Date: Wed, 10 Jan 2018 23:00:30 +0800
Subject: [PATCH] perf report: Add an indication of what time slices are used
Add a time slices indication to the perf report header.
For example,
# perf report --stdio --time 10%
# Total Lost Samples: 0
#
# Samples: 9K of event 'cycles:ppp' (time slices: 10%)
# Event count (approx.): 8951288803
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Suggested--by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Reviewed-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1515596433-24653-6-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-report.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 7d4f0a5de3261..4aaaa37262a8e 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -404,6 +404,9 @@ static size_t hists__fprintf_nr_sample_events(struct hists *hists, struct report
if (evname != NULL)
ret += fprintf(fp, " of event '%s'", evname);
+ if (rep->time_str)
+ ret += fprintf(fp, " (time slices: %s)", rep->time_str);
+
if (symbol_conf.show_ref_callgraph &&
strstr(evname, "call-graph=no")) {
ret += fprintf(fp, ", show reference callgraph");
--
2.30.2