linux-kernel - [PATCH v7 0/2] perf tools: Add PMU alias support

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Date:   Thu,  2 Sep 2021 14:59:53 +0800
From:   Jin Yao <yao.jin@...ux.intel.com>
To:     acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
        mingo@...hat.com, alexander.shishkin@...ux.intel.com
Cc:     Linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        ak@...ux.intel.com, kan.liang@...el.com, yao.jin@...el.com,
        rickyman7@...il.com, john.garry@...wei.com,
        Jin Yao <yao.jin@...ux.intel.com>
Subject: [PATCH v7 0/2] perf tools: Add PMU alias support

A perf uncore PMU may have two PMU names, a real name and an alias name.
With this patch set, the perf tool can monitor the PMU with either the
real name or the alias.

Use the real name,
 $ perf stat -e uncore_cha_2/event=1/ -x,
   4044879584,,uncore_cha_2/event=1/,2528059205,100.00,,

Use the alias,
 $ perf stat -e uncore_type_0_2/event=1/ -x,
   3659675336,,uncore_type_0_2/event=1/,2287306455,100.00,,

v7:
---
1. Create 'struct perf_pmu_alias_name' constructor/destructor.
2. Return '-errno' if opendir() is failed.

v6:
---
1. Call setup_pmu_alias_list in pmu_find_alias_name.
2. Check pmu->name and pmu->alias_name after strdup in pmu_lookup.

v5:
---
1. Don't use strdup in find functions (pmu_find_real_name and
   pmu_find_alias_name). Just return name and keep the
   'pmu->name = strdup(name);' in pmu_lookup.

2. Remove invalid comment for alias_name in struct perf_pmu.

v4:
---
1. Fix memory leaks in pmu_lookup.
2. Rebase to perf/core.

v3:
---
1. Use fgets() to replace fscanf().
2. Resource cleanup.

v2:
---
Add test case to verify the real name and alias name having same effect.

Jin Yao (1):
  perf tests: Test for PMU alias

Kan Liang (1):
  perf pmu: Add PMU alias support

 tools/perf/arch/x86/util/pmu.c  | 155 +++++++++++++++++++++++++++++++-
 tools/perf/tests/parse-events.c |  92 +++++++++++++++++++
 tools/perf/util/parse-events.y  |   3 +-
 tools/perf/util/pmu.c           |  40 ++++++++-
 tools/perf/util/pmu.h           |   5 ++
 5 files changed, 290 insertions(+), 5 deletions(-)

-- 
2.17.1