linux-kernel - [PATCH 44/49] perf stat: Uniquify hybrid event name

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Date:   Mon,  8 Feb 2021 07:25:41 -0800
From:   kan.liang@...ux.intel.com
To:     peterz@...radead.org, acme@...nel.org, mingo@...nel.org,
        linux-kernel@...r.kernel.org
Cc:     tglx@...utronix.de, bp@...en8.de, namhyung@...nel.org,
        jolsa@...hat.com, ak@...ux.intel.com, yao.jin@...ux.intel.com,
        alexander.shishkin@...ux.intel.com, adrian.hunter@...el.com
Subject: [PATCH 44/49] perf stat: Uniquify hybrid event name

From: Jin Yao <yao.jin@...ux.intel.com>

It would be useful to tell user the pmu which the event belongs to.
perf-stat has supported '--no-merge' option and it can print the pmu
name after the event name.

Now this option is enabled by default for hybrid platform.

Before:

root@...pl-adl-s-2:~# ./perf stat -e cycles -a -- sleep 1

 Performance counter stats for 'system wide':

        10,301,466      cycles
         1,557,794      cycles

       1.002068584 seconds time elapsed

After:

root@...pl-adl-s-2:~# ./perf stat -e cycles -a -- sleep 1

 Performance counter stats for 'system wide':

        11,190,657      cycles [cpu_core]
           669,063      cycles [cpu_atom]

       1.002147571 seconds time elapsed

Reviewed-by: Andi Kleen <ak@...ux.intel.com>
Signed-off-by: Jin Yao <yao.jin@...ux.intel.com>
---
 tools/perf/builtin-stat.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 0b08665..bfe7305 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -2379,6 +2379,9 @@ int cmd_stat(int argc, const char **argv)
 
 	evlist__check_cpu_maps(evsel_list);
 
+	if (perf_pmu__hybrid_exist())
+		stat_config.no_merge = true;
+
 	/*
 	 * Initialize thread_map with comm names,
 	 * so we could print it out on output.
-- 
2.7.4