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

Most active threads (last 7 days)

• HOTtoday [PATCH v1 1/3] perf ui hists: In report UI ensure thread is set
  2026-07-09 03:37 · 6 replies in 7d · Ian Rogers <irogers@google.com>
• HOTtoday [PATCH v1 1/2] perf stat: Fix duplicate output with --for-each-cgroup
  2026-07-08 23:31 · 1 reply in 7d · Namhyung Kim <namhyung@kernel.org>
• WARM1d [PATCH 0/3] perf: Fix missing CET property notes on x86 with -fcf-protection
  2026-07-08 04:57 · 3 replies in 7d · Trevor Allison <hidden>
• HOTtoday [PATCH v3 0/2] perf record: fix multi-record Zstd compression
  2026-07-08 13:39 · 2 replies in 7d · Dmitry Ilvokhin <hidden>
• WARM1d [Patch v9 00/10] Perf tools: Support eGPRs/SSP/SIMD registers sampling
  2026-07-06 02:41 · 9 replies in 7d · Dapeng Mi <hidden>
• HOTtoday REVIEWED: 1 (0M) [PATCH] perf test: perftool-testsuite-report fails on s390
  2026-07-09 06:27 · 0 replies in 7d · Thomas Richter <hidden>
• HOTtoday [PATCH] perf stat: Do not open cgroups for BPF counters
  2026-07-08 20:04 · 0 replies in 7d · Namhyung Kim <namhyung@kernel.org>
• HOTtoday [PATCH v1] perf tests: Restore -p flag to lock contention test
  2026-07-08 17:53 · 0 replies in 7d · Ian Rogers <irogers@google.com>
• WARM2d [PATCH v1 0/3] perf jevents: Deterministic build fix and mypy cleanliness
  2026-07-07 03:40 · 3 replies in 7d · Ian Rogers <irogers@google.com>
• HOTtoday [PATCH] perf stat: reject --field-separator and --json-output combination
  2026-07-08 13:24 · 1 reply in 7d · Ivan Lazaric <hidden>

Active reviewers (last 30 days)

• sashiko-bot <sashiko-bot@kernel.org>
  114 attestations (114 Reported-by) · last on 2026-07-09
• James Clark <james.clark@linaro.org>
  38 attestations (37 Reviewed-by, 1 Suggested-by) · last on 2026-07-02
• Namhyung Kim <namhyung@kernel.org>
  33 attestations (33 Acked-by) · last on 2026-06-16
• Tianyou Li <hidden>
  14 attestations (14 Reviewed-by) · last on 2026-06-26
• Wangyang Guo <hidden>
  14 attestations (14 Reviewed-by) · last on 2026-06-26
• Ian Rogers <irogers@google.com>
  11 attestations (1 Acked-by, 1 Reported-by, 9 Reviewed-by) · last on 2026-07-07
• Farid Zakaria <hidden>
  3 attestations (3 Reported-by) · last on 2026-07-08
• Andrii Nakryiko <andrii@kernel.org>
  3 attestations (3 Suggested-by) · last on 2026-07-07
• Kan Liang <hidden>
  3 attestations (3 Co-developed-by) · last on 2026-07-06
• Gabriel Marin <hidden>
  3 attestations (3 Co-developed-by) · last on 2026-06-11

Recent patches

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

• HOTtoday REVIEWED: 1 (0M) [PATCH] perf test: perftool-testsuite-report fails on s390
  2026-07-09 · Thomas Richter <hidden>
• HOTtoday [PATCH v2 4/4] perf hists browser: Increase MAX_OPTIONS to prevent stack buffer overflow
  2026-07-09 · Ian Rogers <irogers@google.com>
• HOTtoday [PATCH v2 3/4] perf annotate: Be robust to annotating without a thread
  2026-07-09 · Ian Rogers <irogers@google.com>
• HOTtoday [PATCH v2 2/4] perf ui hists: Remove duplicated thread in popup_action
  2026-07-09 · Ian Rogers <irogers@google.com>
• HOTtoday [PATCH v2 1/4] perf ui hists: In report UI ensure thread is set
  2026-07-09 · Ian Rogers <irogers@google.com>
• HOTtoday [PATCH v1 3/3] perf annotate: Be robust to annotating without a thread
  2026-07-08 · Ian Rogers <irogers@google.com>
• HOTtoday [PATCH v1 2/3] perf ui hists: Remove duplicated thread in popup_action
  2026-07-08 · Ian Rogers <irogers@google.com>
• HOTtoday [PATCH v1 1/3] perf ui hists: In report UI ensure thread is set
  2026-07-08 · Ian Rogers <irogers@google.com>
• HOTtoday [PATCH v1 2/2] perf evsel: Arrange some fields that should be cloned
  2026-07-08 · Namhyung Kim <namhyung@kernel.org>
• HOTtoday [PATCH v1 1/2] perf stat: Fix duplicate output with --for-each-cgroup
  2026-07-08 · Namhyung Kim <namhyung@kernel.org>
• HOTtoday [PATCH] perf stat: Do not open cgroups for BPF counters
  2026-07-08 · Namhyung Kim <namhyung@kernel.org>
• HOTtoday [PATCH v1] perf tests: Restore -p flag to lock contention test
  2026-07-08 · Ian Rogers <irogers@google.com>
• HOTtoday [PATCH v3 1/2] perf record: Return the written size from process_comp_header()
  2026-07-08 · Dmitry Ilvokhin <hidden>
• HOTtoday [PATCH v3 2/2] perf record: Fix multiple PERF_RECORD_COMPRESSED2 records per push
  2026-07-08 · Dmitry Ilvokhin <hidden>
• HOTtoday [PATCH v2] perf stat: reject --field-separator and --json-output combination
  2026-07-08 · Ivan Lazaric <hidden>
• HOTtoday [PATCH v3 2/2] perf vendor events hygon: Add Hygon Data Fabric PMU events and metrics
  2026-07-08 · Qi Liu <hidden>
• DORMANTno replies [PATCH v4] perf dso: Fix kallsyms DSO detection with fallback logic
  2026-07-08 · Tanushree Shah <hidden>
• DORMANTno replies [PATCH] perf jevents: Add Intel OMR MSR mappings
  2026-07-08 · Dapeng Mi <hidden>
• WARM1d [PATCH 3/3] perf x86: Add .note.gnu.property to assembly linked into perf
  2026-07-08 · Trevor Allison <hidden>
• WARM1d [PATCH 2/3] perf build: Apply EXTRA_CXXFLAGS to C++ builds
  2026-07-08 · Trevor Allison <hidden>
• WARM1d [PATCH 1/3] perf build: Preserve EXTRA_CFLAGS when building in-tree libbpf
  2026-07-08 · Trevor Allison <hidden>
• HOTtoday [PATCH] perf vendor events amd: Reintroduce deprecated Zen 5 core events
  2026-07-07 · Sandipan Das <hidden>
• HOTtoday [PATCH] perf record: fix poll storm when monitored threads exit
  2026-07-07 · Jiawei Sun <hidden>
• DORMANTno replies [PATCH v4 2/2] perf trace: Refactor augmented_raw_syscalls using bpf_for
  2026-07-07 · Viktor Malik <hidden>
• WARM2d [PATCH v4 1/2] perf trace: Factor out BPF loop body
  2026-07-07 · Viktor Malik <hidden>
• WARM2d [PATCH v1 3/3] perf jevents metric: Add python type annotations
  2026-07-07 · Ian Rogers <irogers@google.com>
• WARM2d [PATCH v1 2/3] perf jevents: Add python type annotations
  2026-07-07 · Ian Rogers <irogers@google.com>
• WARM2d [PATCH v1 1/3] perf jevents: Add more components to the metric sorting order
  2026-07-07 · Ian Rogers <irogers@google.com>
• DORMANTno replies [PATCH] perf build: Do not pass -static to dlfilters
  2026-07-07 · Namhyung Kim <namhyung@kernel.org>
• WARM2d [PATCH v2] perf build: Fix compiler errors with old capstone
  2026-07-06 · Namhyung Kim <namhyung@kernel.org>

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.

• STALE173d 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
• STALE173d 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
• STALE173d 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
• STALE162d REVIEWED: 1 (0M) [PATCH v10 01/35] perf jevents: Build support for generating metrics from python
  2026-01-08 · Ian Rogers <irogers@google.com> · 1 Tested-by
• STALE162d REVIEWED: 1 (0M) [PATCH v10 02/35] perf jevents: Add load event json to verify and allow fallbacks
  2026-01-08 · Ian Rogers <irogers@google.com> · 1 Tested-by
• STALE162d REVIEWED: 1 (0M) [PATCH v10 06/35] perf jevents: Add br metric group for branch statistics on AMD
  2026-01-08 · Ian Rogers <irogers@google.com> · 1 Reviewed-by
• STALE162d REVIEWED: 1 (0M) [PATCH v10 10/35] perf jevents: Add load store breakdown metrics ldst for AMD
  2026-01-08 · Ian Rogers <irogers@google.com> · 1 Reviewed-by
• STALE162d REVIEWED: 1 (0M) [PATCH v10 14/35] perf jevents: Add CheckPmu to see if a PMU is in loaded json events
  2026-01-08 · Ian Rogers <irogers@google.com> · 1 Tested-by
• STALE162d REVIEWED: 1 (0M) [PATCH v10 16/35] perf jevents: Mark metrics with experimental events as experimental
  2026-01-08 · Ian Rogers <irogers@google.com> · 1 Tested-by
• STALE162d REVIEWED: 1 (0M) [PATCH v10 18/35] perf jevents: Add br metric group for branch statistics on Intel
  2026-01-08 · Ian Rogers <irogers@google.com> · 1 Tested-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.

• STALE204d LANDED [PATCH 1/4] perf list: Remove unused 'sep' variable
  2025-12-11 · Arnaldo Carvalho de Melo <acme@kernel.org>
• STALE204d LANDED [PATCH 2/4] perf diff: Constify strchr() return variables
  2025-12-11 · Arnaldo Carvalho de Melo <acme@kernel.org>
• STALE204d LANDED [PATCH 3/4] perf tools: Use const for variables receiving str{str,r?chr}() returns
  2025-12-11 · Arnaldo Carvalho de Melo <acme@kernel.org>
• STALE204d LANDED [PATCH 4/4] perf trace: Don't change const char strings
  2025-12-11 · Arnaldo Carvalho de Melo <acme@kernel.org>
• STALE176d [PATCH v3 01/12] perf parse-events: Refactor get_config_terms() to remove macros
  2025-12-12 · James Clark <james.clark@linaro.org>
• STALE176d [PATCH v3 02/12] perf evsel: Support sparse fields in evsel__set_config_if_unset()
  2025-12-12 · James Clark <james.clark@linaro.org>
• STALE176d [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>
• STALE176d [PATCH v3 06/12] perf parse-events: Always track user config changes
  2025-12-12 · James Clark <james.clark@linaro.org>
• STALE176d [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>
• STALE176d [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>