performance events subsystem · Supported

Maintainers

• M Peter Zijlstra <peterz@infradead.org>
• M Ingo Molnar <mingo@redhat.com>
• M Arnaldo Carvalho de Melo <acme@kernel.org>
• M Namhyung Kim <namhyung@kernel.org>
• R Mark Rutland <mark.rutland@arm.com>
• R Alexander Shishkin <alexander.shishkin@linux.intel.com>
• R Jiri Olsa <jolsa@kernel.org>
• R Ian Rogers <irogers@google.com>
• R Adrian Hunter <adrian.hunter@intel.com>
• R James Clark <james.clark@linaro.org>

Paths

• F arch/*/events/*
• F arch/*/events/*/*
• F arch/*/include/asm/perf_event.h
• F arch/*/kernel/*/*/perf_event*.c
• F arch/*/kernel/*/perf_event*.c
• F arch/*/kernel/perf_callchain.c
• F arch/*/kernel/perf_event*.c
• F include/linux/perf_event.h
• F include/uapi/linux/perf_event.h
• F kernel/events/*
• F tools/lib/perf/
• F tools/perf/

Last 30 days

Active reviewers (last 30 days)

• James Clark <james.clark@linaro.org>
  38 attestations (37 Reviewed-by, 1 Suggested-by) · last on 2026-07-02

Recent patches

Most-recent 30 patches in this subsystem on linux-arm-kernel (capped at 30), ordered by date desc.

• COOLING5d REVIEWED: 3 (3M) [PATCH v11 9/9] perf test: Add Arm CoreSight callchain test
  2026-07-02 · Leo Yan <leo.yan@arm.com>
• COOLING5d REVIEWED: 3 (3M) [PATCH v11 8/9] perf cs-etm: Synthesize callchains for instruction samples
  2026-07-02 · Leo Yan <leo.yan@arm.com>
• COOLING5d REVIEWED: 3 (3M) [PATCH v11 7/9] perf cs-etm: Support call indentation
  2026-07-02 · Leo Yan <leo.yan@arm.com>
• COOLING5d REVIEWED: 3 (3M) [PATCH v11 3/9] perf cs-etm: Decode ETE exception packets
  2026-07-02 · Leo Yan <leo.yan@arm.com>
• COOLING5d REVIEWED: 3 (3M) [PATCH v11 4/9] perf cs-etm: Refactor instruction size handling
  2026-07-02 · Leo Yan <leo.yan@arm.com>
• COOLING5d REVIEWED: 3 (3M) [PATCH v11 5/9] perf cs-etm: Use thread-stack for last branch entries
  2026-07-02 · Leo Yan <leo.yan@arm.com>
• COOLING5d REVIEWED: 3 (3M) [PATCH v11 6/9] perf cs-etm: Flush thread stacks after decoder reset
  2026-07-02 · Leo Yan <leo.yan@arm.com>
• COOLING5d REVIEWED: 3 (3M) [PATCH v11 2/9] perf cs-etm: Filter synthesized branch samples
  2026-07-02 · Leo Yan <leo.yan@arm.com>
• COOLING5d REVIEWED: 3 (3M) [PATCH v11 1/9] perf cs-etm: Fix thread leaks on trace queue init failure
  2026-07-02 · Leo Yan <leo.yan@arm.com>
• WARM3d [PATCH v8 22/22] TEST(do-not-upstream): fake qemu vendor JSON + mapfile entry for CounterIDMask path
  2026-07-01 · Atish Patra <atish.patra@linux.dev>
• WARM3d [PATCH v8 19/22] tools/perf: Support event code for arch standard events
  2026-07-01 · Atish Patra <atish.patra@linux.dev>
• WARM3d [PATCH v8 20/22] tools/perf: Add RISC-V CounterIDMask event field
  2026-07-01 · Atish Patra <atish.patra@linux.dev>
• COLD18d [PATCH v7 22/22] TEST(do-not-upstream): fake qemu vendor JSON + mapfile entry for CounterIDMask path
  2026-06-22 · Atish Patra <atish.patra@linux.dev>
• COLD18d [PATCH v7 19/22] tools/perf: Support event code for arch standard events
  2026-06-22 · Atish Patra <atish.patra@linux.dev>
• COLD18d [PATCH v7 20/22] tools/perf: Add RISC-V CounterIDMask event field
  2026-06-22 · Atish Patra <atish.patra@linux.dev>
• COOLING8d REVIEWED: 3 (3M) [PATCH v10 7/9] perf cs-etm: Support call indentation
  2026-06-17 · Leo Yan <leo.yan@arm.com>
• COOLING8d REVIEWED: 3 (3M) [PATCH v10 8/9] perf cs-etm: Synthesize callchains for instruction samples
  2026-06-17 · Leo Yan <leo.yan@arm.com>
• COOLING8d REVIEWED: 3 (3M) [PATCH v10 9/9] perf test: Add Arm CoreSight callchain test
  2026-06-17 · Leo Yan <leo.yan@arm.com>
• COOLING8d REVIEWED: 3 (3M) [PATCH v10 6/9] perf cs-etm: Flush thread stacks after decoder reset
  2026-06-17 · Leo Yan <leo.yan@arm.com>
• COOLING8d REVIEWED: 3 (3M) [PATCH v10 5/9] perf cs-etm: Use thread-stack for last branch entries
  2026-06-17 · Leo Yan <leo.yan@arm.com>
• COOLING8d REVIEWED: 3 (3M) [PATCH v10 4/9] perf cs-etm: Refactor instruction size handling
  2026-06-17 · Leo Yan <leo.yan@arm.com>
• COOLING8d REVIEWED: 3 (3M) [PATCH v10 3/9] perf cs-etm: Decode ETE exception packets
  2026-06-17 · Leo Yan <leo.yan@arm.com>
• COOLING8d REVIEWED: 3 (3M) [PATCH v10 2/9] perf cs-etm: Filter synthesized branch samples
  2026-06-17 · Leo Yan <leo.yan@arm.com>
• COOLING8d REVIEWED: 3 (3M) [PATCH v10 1/9] perf cs-etm: Fix thread leaks on trace queue init failure
  2026-06-17 · Leo Yan <leo.yan@arm.com>
• WARM2d [PATCH v5 2/4] perf/core: Clear the whole branch entry in perf_clear_branch_entry()
  2026-06-16 · Puranjay Mohan <puranjay@kernel.org>
• COLD22d [PATCH v9 9/9] perf test: Add Arm CoreSight callchain test
  2026-06-16 · Leo Yan <leo.yan@arm.com>
• COLD22d REVIEWED: 3 (3M) [PATCH v9 8/9] perf cs-etm: Synthesize callchains for instruction samples
  2026-06-16 · Leo Yan <leo.yan@arm.com>
• COLD22d REVIEWED: 3 (3M) [PATCH v9 7/9] perf cs-etm: Support call indentation
  2026-06-16 · Leo Yan <leo.yan@arm.com>
• COLD22d REVIEWED: 3 (3M) [PATCH v9 6/9] perf cs-etm: Flush thread stacks after decoder reset
  2026-06-16 · Leo Yan <leo.yan@arm.com>
• COLD22d REVIEWED: 3 (3M) [PATCH v9 5/9] perf cs-etm: Use thread-stack for last branch entries
  2026-06-16 · Leo Yan <leo.yan@arm.com>

Needs attention (review trailers in, no pickup)

Patches with review trailers that haven't landed in mainline and haven't been Acked by a maintainer. Oldest first.

• STALE174d REVIEWED: 4 (4M) [PATCH RESEND v4 4/8] perf arm_spe: Set extended fields in data source
  2026-01-06 · Leo Yan <leo.yan@arm.com> · 2 Reviewed-by
• STALE174d REVIEWED: 4 (4M) [PATCH RESEND v4 6/8] perf sort: Sort disabled and full predicated flags
  2026-01-06 · Leo Yan <leo.yan@arm.com> · 2 Reviewed-by
• STALE174d REVIEWED: 4 (4M) [PATCH RESEND v4 8/8] perf arm_spe: Improve SIMD flags setting
  2026-01-06 · Leo Yan <leo.yan@arm.com> · 2 Reviewed-by
• STALE176d REVIEWED: 1 (1M) [PATCH v5 01/14] perf parse-events: Refactor get_config_terms() to remove macros
  2026-01-14 · James Clark <james.clark@linaro.org> · 1 Reviewed-by
• STALE176d REVIEWED: 1 (1M) [PATCH v5 04/14] perf evsel: Support sparse fields in evsel__set_config_if_unset()
  2026-01-14 · James Clark <james.clark@linaro.org> · 1 Reviewed-by
• STALE176d REVIEWED: 1 (1M) [PATCH v5 05/14] perf parse-events: Track all user changed config bits
  2026-01-14 · James Clark <james.clark@linaro.org> · 1 Reviewed-by
• STALE176d REVIEWED: 1 (1M) [PATCH v5 06/14] perf evsel: apply evsel__set_config_if_unset() to all config fields
  2026-01-14 · James Clark <james.clark@linaro.org> · 1 Reviewed-by
• STALE176d REVIEWED: 1 (1M) [PATCH v5 07/14] perf evsel: Add a helper to get the value of a config field
  2026-01-14 · James Clark <james.clark@linaro.org> · 1 Reviewed-by
• STALE176d REVIEWED: 1 (1M) [PATCH v5 08/14] perf parse-events: Always track user config changes
  2026-01-14 · James Clark <james.clark@linaro.org> · 1 Reviewed-by
• STALE176d REVIEWED: 1 (1M) [PATCH v5 09/14] perf tests: Test evsel__set_config_if_unset() and config change tracking
  2026-01-14 · James Clark <james.clark@linaro.org> · 1 Reviewed-by

Quiet for 30+ days

Patches with no review trailers and no replies. Either the author is heads-down elsewhere or these slipped through. Oldest first.

• STALE177d [PATCH v3 01/12] perf parse-events: Refactor get_config_terms() to remove macros
  2025-12-12 · James Clark <james.clark@linaro.org>
• STALE177d [PATCH v3 02/12] perf evsel: Support sparse fields in evsel__set_config_if_unset()
  2025-12-12 · James Clark <james.clark@linaro.org>
• STALE177d [PATCH v3 04/12] perf evsel: apply evsel__set_config_if_unset() to all config fields
  2025-12-12 · James Clark <james.clark@linaro.org>
• STALE177d [PATCH v3 06/12] perf parse-events: Always track user config changes
  2025-12-12 · James Clark <james.clark@linaro.org>
• STALE177d [PATCH v3 07/12] perf tests: Test evsel__set_config_if_unset() and config change tracking
  2025-12-12 · James Clark <james.clark@linaro.org>
• STALE177d [PATCH v3 09/12] perf cs-etm: Don't use hard coded config bits when setting up ETMCR
  2025-12-12 · James Clark <james.clark@linaro.org>
• STALE177d [PATCH v3 11/12] perf cs-etm: Don't hard code config attribute when configuring the event
  2025-12-12 · James Clark <james.clark@linaro.org>
• STALE177d [PATCH v3 12/12] perf arm-spe: Don't hard code config attribute
  2025-12-12 · James Clark <james.clark@linaro.org>
• STALE197d [PATCH 2/2] perf arm-spe: Add NVIDIA Olympus to neoverse list
  2025-12-19 · Besar Wicaksono <hidden>
• STALE176d [PATCH v4 03/14] perf evsel: Move evsel__* functions to evsel.c
  2025-12-22 · James Clark <james.clark@linaro.org>