linux-kernel - [PATCH v1 0/3] perf cs-etm: Add support for callchain

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Date:   Fri, 30 Aug 2019 14:24:18 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Mike Leach <mike.leach@...aro.org>,
        Robert Walker <Robert.Walker@....com>,
        Adrian Hunter <adrian.hunter@...el.com>
Cc:     Leo Yan <leo.yan@...aro.org>
Subject: [PATCH v1 0/3] perf cs-etm: Add support for callchain

This patch seris adds support for instruction sample's callchain.

Patch 01 is to refactor the instruction size calculation; patch 02
is to add thread stack and callchain support; patch 03 is a minor fixing
for instruction sample generation thus the instruction sample can be
alignment with the callchain generation.

Before:

  # perf script --itrace=g16l64i100
            main  1579        100      instructions:  ffff0000102137f0 group_sched_in+0xb0 ([kernel.kallsyms])
            main  1579        100      instructions:  ffff000010213b78 flexible_sched_in+0xf0 ([kernel.kallsyms])
            main  1579        100      instructions:  ffff0000102135ac event_sched_in.isra.57+0x74 ([kernel.kallsyms])
            main  1579        100      instructions:  ffff000010219344 perf_swevent_add+0x6c ([kernel.kallsyms])
            main  1579        100      instructions:  ffff000010214854 perf_event_update_userpage+0x4c ([kernel.kallsyms])

  [...]

After:

  # perf script --itrace=g16l64i100

  main  1579        100      instructions: 
          ffff0000102137f0 group_sched_in+0xb0 ([kernel.kallsyms])

  main  1579        100      instructions: 
          ffff000010213b78 flexible_sched_in+0xf0 ([kernel.kallsyms])
          ffff00001020c0b4 visit_groups_merge+0x12c ([kernel.kallsyms])

  main  1579        100      instructions: 
          ffff0000102135ac event_sched_in.isra.57+0x74 ([kernel.kallsyms])
          ffff0000102137a0 group_sched_in+0x60 ([kernel.kallsyms])
          ffff000010213b84 flexible_sched_in+0xfc ([kernel.kallsyms])
          ffff00001020c0b4 visit_groups_merge+0x12c ([kernel.kallsyms])

  main  1579        100      instructions: 
          ffff000010219344 perf_swevent_add+0x6c ([kernel.kallsyms])
          ffff0000102135f4 event_sched_in.isra.57+0xbc ([kernel.kallsyms])
          ffff0000102137a0 group_sched_in+0x60 ([kernel.kallsyms])
          ffff000010213b84 flexible_sched_in+0xfc ([kernel.kallsyms])
          ffff00001020c0b4 visit_groups_merge+0x12c ([kernel.kallsyms])

  main  1579        100      instructions: 
          ffff000010214854 perf_event_update_userpage+0x4c ([kernel.kallsyms])
          ffff000010219360 perf_swevent_add+0x88 ([kernel.kallsyms])
          ffff0000102135f4 event_sched_in.isra.57+0xbc ([kernel.kallsyms])
          ffff0000102137a0 group_sched_in+0x60 ([kernel.kallsyms])
          ffff000010213b84 flexible_sched_in+0xfc ([kernel.kallsyms])
          ffff00001020c0b4 visit_groups_merge+0x12c ([kernel.kallsyms])

  [...]

Leo Yan (3):
  perf cs-etm: Refactor instruction size handling
  perf cs-etm: Add callchain to instruction sample
  perf cs-etm: Correct the packet usage for instruction sample

 tools/perf/util/cs-etm.c | 122 +++++++++++++++++++++++++++++++++------
 1 file changed, 105 insertions(+), 17 deletions(-)

-- 
2.17.1