linux-kernel - [PATCH v3 0/3] perf tool: Enable cpu list for hybrid

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Date:   Mon, 12 Jul 2021 15:12:32 +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, ak@...ux.intel.com,
        kan.liang@...el.com, yao.jin@...el.com,
        Jin Yao <yao.jin@...ux.intel.com>
Subject: [PATCH v3 0/3] perf tool: Enable cpu list for hybrid

The perf-record and perf-stat have supported the option '-C/--cpus'
to count or collect only on the list of CPUs provided. This option
needs to be supported for hybrid as well.

v3:
---
Rebase to latest perf/core branch.

v2:
---
Automatically map to hybrid pmu.

For example,

If cpu0-7 are 'cpu_core' and cpu9-11 are 'cpu_atom',

  # perf stat -e cycles -C0,11 -- sleep 1
  WARNING: use 0 in 'cpu_core' for 'cycles', skip other cpus in list.
  WARNING: use 11 in 'cpu_atom' for 'cycles', skip other cpus in list.

   Performance counter stats for 'CPU(s) 0,11':

           1,914,704      cpu_core/cycles/
           2,036,983      cpu_atom/cycles/

         1.005815641 seconds time elapsed

It automatically selects cpu0 for cpu_core/cycles/, selects cpu11 for
cpu_atom/cycles/, also with some warnings output.

Jin Yao (3):
  libperf: Add perf_cpu_map__default_new()
  perf tools: Create hybrid flag in target
  perf tools: Enable on a list of CPUs for hybrid

 tools/lib/perf/cpumap.c              |  5 +++
 tools/lib/perf/include/perf/cpumap.h |  1 +
 tools/perf/builtin-record.c          |  7 +++
 tools/perf/builtin-stat.c            |  6 +++
 tools/perf/util/evlist-hybrid.c      | 65 ++++++++++++++++++++++++++++
 tools/perf/util/evlist-hybrid.h      |  1 +
 tools/perf/util/evlist.c             |  3 +-
 tools/perf/util/pmu.c                | 35 +++++++++++++++
 tools/perf/util/pmu.h                |  4 ++
 tools/perf/util/target.h             |  1 +
 10 files changed, 127 insertions(+), 1 deletion(-)

-- 
2.17.1