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

Message ID 20211102180739.18049-1-german.gomez@arm.com (mailing list archive)
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Series perf arm-spe: Track pid/tid for Arm SPE samples | expand

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German Gomez Nov. 2, 2021, 6:07 p.m. UTC 
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(-)