Messages in this thread | | | From | German Gomez <> | Subject | [PATCH 0/3] perf arm-spe: Track pid/tid for Arm SPE samples | Date | Tue, 2 Nov 2021 18:07:36 +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 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
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