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From: German Gomez <german.gomez@arm.com>
To: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
	acme@kernel.org
Cc: German Gomez <german.gomez@arm.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
	John Garry <john.garry@huawei.com>, Will Deacon <will@kernel.org>,
	Mathieu Poirier <mathieu.poirier@linaro.org>,
	Leo Yan <leo.yan@linaro.org>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 0/4] perf arm-spe: Track pid/tid for Arm SPE samples
Date: Thu, 11 Nov 2021 13:36:21 +0000	[thread overview]
Message-ID: <20211111133625.193568-1-german.gomez@arm.com> (raw)

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 updates perf-record documentation and arm-spe recording so
    that they are consistent.
  - Patch #3 saves the value of SPE CONTEXT packet to the arm_spe_record
    struct.
  - Patch #4 enables hardware-based pid tracking using SPE CONTEXT
    packets.

---

Changes since v2:

  - [PATCH 4/4] Set pid to '-1' in hardware-based pid&tid tracking.

Changes since v1:

  - [PATCH 1/4] Fix authorship of commit.
  - [PATCH 2/4] (New patch) Updated perf-record docs to reflect the
    behavior of Arm SPE introduced by the previous patch.
  - [PATCH 3/4] update initialization of context_id field to (u64)-1.
  - [PATCH 4/4] Update handling of pid/tid tracking fallback following
    Leo Yan's suggestion. Don't consider per-thread mode on this patch.

[1] https://lore.kernel.org/lkml/f877cfa6-9b25-6445-3806-ca44a4042eaf@arm.com/T/#m8a9890e929d2eab54cd51296837ece5d1a473349

German Gomez (3):
  perf arm-spe: Update --switch-events docs in perf-record
  perf arm-spe: Save context ID in record
  perf arm-spe: Support hardware-based PID tracing

Namhyung Kim (1):
  perf arm-spe: Track task context switch for cpu-mode events

 tools/perf/Documentation/perf-record.txt      |   2 +-
 tools/perf/arch/arm64/util/arm-spe.c          |   8 +-
 .../util/arm-spe-decoder/arm-spe-decoder.c    |   2 +
 .../util/arm-spe-decoder/arm-spe-decoder.h    |   1 +
 tools/perf/util/arm-spe.c                     | 120 ++++++++++++++----
 5 files changed, 104 insertions(+), 29 deletions(-)

-- 
2.25.1


             reply	other threads:[~2021-11-11 13:36 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-11 13:36 German Gomez [this message]
2021-11-11 13:36 ` [PATCH v3 1/4] perf arm-spe: Track task context switch for cpu-mode events German Gomez
2021-11-11 13:36 ` [PATCH v3 2/4] perf arm-spe: Update --switch-events docs in perf-record German Gomez
2021-11-11 13:36 ` [PATCH v3 3/4] perf arm-spe: Save context ID in record German Gomez
2021-11-11 13:36 ` [PATCH v3 4/4] perf arm-spe: Support hardware-based PID tracing German Gomez
2021-11-11 17:23   ` Namhyung Kim
2021-11-11 18:27     ` Arnaldo Carvalho de Melo

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