linux-kernel - [PATCH V2 1/3] perf,tools: get correct cpu id for print

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Date:	Thu,  2 Jul 2015 03:08:43 -0400
From:	kan.liang@...el.com
To:	acme@...nel.org, jolsa@...nel.org
Cc:	ak@...ux.intel.com, namhyung@...nel.org, eranian@...gle.com,
	adrian.hunter@...el.com, dsahern@...il.com, a.p.zijlstra@...llo.nl,
	mingo@...hat.com, linux-kernel@...r.kernel.org,
	Kan Liang <kan.liang@...el.com>
Subject: [PATCH V2 1/3] perf,tools: get correct cpu id for print_aggr

From: Kan Liang <kan.liang@...el.com>

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>
---

Changes since V1
 - Modify changelog
 - Remove perf_evsel__get_cpumap_index 
 
 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 37e301a..47c3c1f 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;
-- 
1.8.3.1

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