linux-kernel - [PATCH 0/3] perf arm-spe: Track pid/tid for Arm SPE samples

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Date:   Tue,  2 Nov 2021 18:07:36 +0000
From:   German Gomez <german.gomez@....com>
To:     linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        acme@...nel.org
Cc:     German Gomez <german.gomez@....com>,
        John Garry <john.garry@...wei.com>,
        Will Deacon <will@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 0/3] perf arm-spe: Track pid/tid for Arm SPE samples

The following patchset is an iteration on RFC [1] where pid/tid info is
assigned to the Arm SPE synthesized samples. Two methods of tracking
pids are considered: hardware-based (using Arm SPE CONTEXT packets), and
context-switch events (from perf) as fallback.

- Patch #1 enables pid tracking using RECORD_SWITCH* events from perf.
- Patch #2 saves the value of SPE CONTEXT packet to the arm_spe_record
  struct (patch from [2]).
- Patch #3 enables hardware-based pid tracking using SPE CONTEXT packets.

[1] https://lore.kernel.org/lkml/20210916001748.1525291-1-namhyung@kernel.org/
[2] https://www.spinics.net/lists/linux-perf-users/msg12543.html

German Gomez (3):
  perf arm-spe: Track task context switch for cpu-mode events
  perf arm-spe: Save context ID in record
  perf arm-spe: Support hardware-based PID tracing

 tools/perf/arch/arm64/util/arm-spe.c          |   6 +-
 .../util/arm-spe-decoder/arm-spe-decoder.c    |   2 +
 .../util/arm-spe-decoder/arm-spe-decoder.h    |   1 +
 tools/perf/util/arm-spe.c                     | 144 ++++++++++++++----
 4 files changed, 123 insertions(+), 30 deletions(-)

-- 
2.25.1