linux-kernel - [tip:perf/urgent] perf stat: Get correct cpu id for print

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Date:	Mon, 31 Aug 2015 01:27:46 -0700
From:	tip-bot for Kan Liang <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	adrian.hunter@...el.com, hpa@...or.com, kan.liang@...el.com,
	ak@...ux.intel.com, dsahern@...il.com,
	linux-kernel@...r.kernel.org, tglx@...utronix.de,
	a.p.zijlstra@...llo.nl, jolsa@...nel.org, mingo@...nel.org,
	namhyung@...nel.org, acme@...hat.com, eranian@...gle.com
Subject: [tip:perf/urgent] perf stat: Get correct cpu id for print_aggr

Commit-ID:  601083cffb7cabdcc55b8195d732f0f7028570fa
Gitweb:     http://git.kernel.org/tip/601083cffb7cabdcc55b8195d732f0f7028570fa
Author:     Kan Liang <kan.liang@...el.com>
AuthorDate: Thu, 2 Jul 2015 03:08:43 -0400
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Fri, 28 Aug 2015 11:49:52 -0300

perf stat: Get correct cpu id for print_aggr

print_aggr() fails to print per-core/per-socket statistics after commit
582ec0829b3d ("perf stat: Fix per-socket output bug for uncore events")
if events have differnt cpus. Because in print_aggr(), aggr_get_id needs
index (not cpu id) to find core/pkg id. Also, evsel cpu maps should be
used to get aggregated id.

Here is an example:

Counting events cycles,uncore_imc_0/cas_count_read/. (Uncore event has
cpumask 0,18)

  $ perf stat -e cycles,uncore_imc_0/cas_count_read/ -C0,18 --per-core sleep 2

Without this patch, it failes to get CPU 18 result.

   Performance counter stats for 'CPU(s) 0,18':

  S0-C0           1            7526851      cycles
  S0-C0           1               1.05 MiB  uncore_imc_0/cas_count_read/
  S1-C0           0      <not counted>      cycles
  S1-C0           0      <not counted> MiB  uncore_imc_0/cas_count_read/

With this patch, it can get both CPU0 and CPU18 result.

   Performance counter stats for 'CPU(s) 0,18':

  S0-C0           1            6327768      cycles
  S0-C0           1               0.47 MiB  uncore_imc_0/cas_count_read/
  S1-C0           1             330228      cycles
  S1-C0           1               0.29 MiB  uncore_imc_0/cas_count_read/

Signed-off-by: Kan Liang <kan.liang@...el.com>
Acked-by: Jiri Olsa <jolsa@...nel.org>
Acked-by: Stephane Eranian <eranian@...gle.com>
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Fixes: 582ec0829b3d ("perf stat: Fix per-socket output bug for uncore events")
Link: http://lkml.kernel.org/r/1435820925-51091-1-git-send-email-kan.liang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/builtin-stat.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index d99d850..ef355fc 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -694,7 +694,7 @@ static void abs_printout(int id, int nr, struct perf_evsel *evsel, double avg)
 static void print_aggr(char *prefix)
 {
 	struct perf_evsel *counter;
-	int cpu, cpu2, s, s2, id, nr;
+	int cpu, s, s2, id, nr;
 	double uval;
 	u64 ena, run, val;
 
@@ -707,8 +707,7 @@ static void print_aggr(char *prefix)
 			val = ena = run = 0;
 			nr = 0;
 			for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
-				cpu2 = perf_evsel__cpus(counter)->map[cpu];
-				s2 = aggr_get_id(evsel_list->cpus, cpu2);
+				s2 = aggr_get_id(perf_evsel__cpus(counter), cpu);
 				if (s2 != id)
 					continue;
 				val += perf_counts(counter->counts, cpu, 0)->val;
--
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