Messages in this thread | | | From | German Gomez <> | Subject | [PATCH v3 0/4] perf arm-spe: Track pid/tid for Arm SPE samples | Date | Thu, 11 Nov 2021 13:36:21 +0000 |
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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.
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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
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