linux-kernel - [PATCH 0/2] perf stat: Unbreak perf stat with ARMv8 PMU events

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Date:   Tue, 22 Sep 2020 11:13:44 +0800
From:   Wei Li <liwei391@...wei.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        "Namhyung Kim" <namhyung@...nel.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Alexey Budankov <alexey.budankov@...ux.intel.com>,
        Adrian Hunter <adrian.hunter@...el.com>
CC:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <huawei.libin@...wei.com>
Subject: [PATCH 0/2] perf stat: Unbreak perf stat with ARMv8 PMU events

Currently, perf-stat with armv8_pmu events with a workload is broken.
This patch set just fixes that.

Before the patch set:
[root@...alhost hulk]# tools/perf/perf stat  -e armv8_pmuv3_0/ll_cache_rd/,armv8_pmuv3_0/ll_cache_miss_rd/ ls > /dev/null
Segmentation fault

After the patch set:
[root@...alhost hulk]# tools/perf/perf stat  -e armv8_pmuv3_0/ll_cache_rd/,armv8_pmuv3_0/ll_cache_miss_rd/ ls > /dev/null

 Performance counter stats for 'ls':

            39,882      armv8_pmuv3_0/ll_cache_rd/                                   
             9,639      armv8_pmuv3_0/ll_cache_miss_rd/                                   

       0.001416690 seconds time elapsed

       0.001469000 seconds user
       0.000000000 seconds sys

Wei Li (2):
  perf stat: Fix segfault when counting armv8 PMU events
  perf stat: Unbreak perf stat with armv8 PMU events

 tools/lib/perf/include/internal/evlist.h |  1 +
 tools/perf/builtin-stat.c                | 37 ++++++++++++++++--------
 tools/perf/util/evlist.c                 | 23 ++++++++++++++-
 3 files changed, 48 insertions(+), 13 deletions(-)

-- 
2.17.1