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)

• WARM1d [PATCH v5 0/9] perf c2c: add a function view
  2026-07-30 09:01 · 9 replies in 7d · Jiebin Sun <hidden>
• HOTtoday [PATCH v5 0/3] perf sched latency: Refine outputs, unit scaling, and histogram support
  2026-07-30 18:54 · 3 replies in 7d · Aaron Tomlin <atomlin@atomlin.com>
• HOTtoday [PATCH] perf trace: Format fields with hex specifiers in print_fmt as hexadecimal
  2026-07-31 21:59 · 0 replies in 7d · Aaron Tomlin <atomlin@atomlin.com>
• WARM1d [PATCH v2 0/3] perf hisi-ptt: Fix TLP header parsing and naming
  2026-07-30 06:27 · 3 replies in 7d · Sizhe Liu <hidden>
• WARM2d [PATCH v4 0/3] perf sched latency: Refine outputs, unit scaling, and histogram support
  2026-07-29 14:45 · 3 replies in 7d · Aaron Tomlin <atomlin@atomlin.com>
• DORMANTno replies [PATCH] perf build: Fix a build error on 32-bit x86
  2026-07-30 23:59 · 0 replies in 7d · Namhyung Kim <namhyung@kernel.org>
• WARM2d [PATCH 0/2] perf hisi-ptt: Fix TLP header parsing and naming
  2026-07-29 06:02 · 2 replies in 7d · Sizhe Liu <hidden>
• HOTtoday [PATCHES 0/5 v1] perf tools auxtrace hardening series
  2026-07-27 16:17 · 5 replies in 7d · Arnaldo Carvalho de Melo <acme@kernel.org>
• COOLING5d [PATCHES 0/8 v1] perf machine fixes
  2026-07-26 23:40 · 8 replies in 7d · Arnaldo Carvalho de Melo <acme@kernel.org>
• HOTtoday REVIEWED: 1 (1M) [PATCH v3] perf stat: Include PMU name and split uncore events per PMU in metric-only JSON output
  2026-07-29 17:04 · 0 replies in 7d · Chun-Tse Shao <hidden>

Active reviewers (last 30 days)

• Tianyou Li <hidden>
  46 attestations (46 Reviewed-by) · last on 2026-07-30
• Wangyang Guo <hidden>
  46 attestations (46 Reviewed-by) · last on 2026-07-30
• Chun-Tse Shao <hidden>
  28 attestations (28 Acked-by) · last on 2026-07-16
• sashiko-bot <sashiko-bot@kernel.org>
  23 attestations (23 Reported-by) · last on 2026-07-27
• Ian Rogers <irogers@google.com>
  8 attestations (1 Reported-by, 7 Reviewed-by) · last on 2026-07-29
• Josh Stone <hidden>
  7 attestations (7 Reported-by) · last on 2026-07-23
• Kan Liang <hidden>
  6 attestations (6 Co-developed-by) · last on 2026-07-21
• James Clark <james.clark@linaro.org>
  3 attestations (2 Reviewed-by, 1 Tested-by) · last on 2026-07-30
• Jan Polensky <hidden>
  3 attestations (3 Reviewed-by) · last on 2026-07-09
• Andrii Nakryiko <andrii@kernel.org>
  3 attestations (3 Suggested-by) · last on 2026-07-07

Recent patches

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

• HOTtoday [PATCH] perf trace: Format fields with hex specifiers in print_fmt as hexadecimal
  2026-07-31 · Aaron Tomlin <atomlin@atomlin.com>
• DORMANTno replies [PATCH] perf build: Fix a build error on 32-bit x86
  2026-07-30 · Namhyung Kim <namhyung@kernel.org>
• HOTtoday [PATCH v5 3/3] perf sched latency: Add histogram and time interval options
  2026-07-30 · Aaron Tomlin <atomlin@atomlin.com>
• HOTtoday [PATCH v5 2/3] perf sched latency: Auto-scale latency and runtime display units
  2026-07-30 · Aaron Tomlin <atomlin@atomlin.com>
• HOTtoday [PATCH v5 1/3] perf sched: Suppress latency table output when trace samples are missing
  2026-07-30 · Aaron Tomlin <atomlin@atomlin.com>
• WARM1d REVIEWED: 2 (0M) [PATCH v5 v5 9/9] perf c2c: document function view in perf-c2c man page
  2026-07-30 · Jiebin Sun <hidden>
• WARM1d REVIEWED: 2 (0M) [PATCH v5 v5 8/9] perf c2c: add function view browser UI and cacheline detail
  2026-07-30 · Jiebin Sun <hidden>
• WARM1d REVIEWED: 2 (0M) [PATCH v5 v5 7/9] perf c2c: build and finalize the function view hierarchy
  2026-07-30 · Jiebin Sun <hidden>
• WARM1d REVIEWED: 2 (0M) [PATCH v5 v5 6/9] perf c2c: add function view hierarchy entry creation
  2026-07-30 · Jiebin Sun <hidden>
• WARM1d REVIEWED: 2 (0M) [PATCH v5 v5 5/9] perf c2c: add function view stats merge and memory management
  2026-07-30 · Jiebin Sun <hidden>
• WARM1d REVIEWED: 2 (0M) [PATCH v5 v5 4/9] perf c2c: add HPP list parsing for function view columns
  2026-07-30 · Jiebin Sun <hidden>
• WARM1d REVIEWED: 2 (0M) [PATCH v5 v5 3/9] perf c2c: add column rendering for function view
  2026-07-30 · Jiebin Sun <hidden>
• WARM1d REVIEWED: 2 (0M) [PATCH v5 v5 2/9] perf c2c: add function view browser skeleton
  2026-07-30 · Jiebin Sun <hidden>
• WARM1d REVIEWED: 2 (0M) [PATCH v5 v5 1/9] perf c2c: extract shared data structures into c2c.h
  2026-07-30 · Jiebin Sun <hidden>
• WARM1d [PATCH v2 2/3] perf hisi-ptt: Strengthen auxtrace event handling and packet type detection
  2026-07-30 · Sizhe Liu <hidden>
• WARM1d REVIEWED: 3 (3M) [PATCH v2 1/3] perf hisi-ptt: Fix PTT trace TLP header parsing
  2026-07-30 · Sizhe Liu <hidden>
• WARM1d REVIEWED: 3 (3M) [PATCH v2 3/3] perf hisi-ptt: Fix spelling and abbreviation errors
  2026-07-30 · Sizhe Liu <hidden>
• HOTtoday REVIEWED: 1 (1M) [PATCH v3] perf stat: Include PMU name and split uncore events per PMU in metric-only JSON output
  2026-07-29 · Chun-Tse Shao <hidden>
• WARM2d [PATCH v4 3/3] perf sched latency: Add histogram and time interval options
  2026-07-29 · Aaron Tomlin <atomlin@atomlin.com>
• WARM2d [PATCH v4 2/3] perf sched latency: Auto-scale latency and runtime display units
  2026-07-29 · Aaron Tomlin <atomlin@atomlin.com>
• WARM2d [PATCH v4 1/3] perf sched: Suppress latency table output when trace samples are missing
  2026-07-29 · Aaron Tomlin <atomlin@atomlin.com>
• WARM2d [PATCH 2/2] perf hisi-ptt: Fix PTT trace TLP header parsing
  2026-07-29 · Sizhe Liu <hidden>
• WARM2d [PATCH 1/2] perf hisi-ptt: Fix spelling and abbreviation errors
  2026-07-29 · Sizhe Liu <hidden>
• WARM2d [PATCH 1/1] perf libdw: Fix outer-frame name resolution and spurious "(inlined)" tag
  2026-07-28 · Michael Liang <hidden>
• DORMANTno replies [PATCH] perf symbols: Skip dynamic symbols with invalid section indexes
  2026-07-28 · Zhanpeng Zhang <hidden>
• HOTtoday [PATCH 5/5] perf arm-spe: Reject zero nr_cpu in metadata to prevent division by zero
  2026-07-27 · Arnaldo Carvalho de Melo <acme@kernel.org>
• HOTtoday [PATCH 4/5] perf intel-bts: Fix off-by-one in auxtrace_info minimum size check
  2026-07-27 · Arnaldo Carvalho de Melo <acme@kernel.org>
• HOTtoday [PATCH 3/5] perf intel-pt: Fix off-by-one in auxtrace_info minimum size check
  2026-07-27 · Arnaldo Carvalho de Melo <acme@kernel.org>
• HOTtoday [PATCH 2/5] perf auxtrace: Fix queue grow overflow and old array leak
  2026-07-27 · Arnaldo Carvalho de Melo <acme@kernel.org>
• HOTtoday [PATCH 1/5] perf thread-stack: Fix heap buffer overflow on branch stack wrap copy
  2026-07-27 · Arnaldo Carvalho de Melo <acme@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.

• STALE190d REVIEWED: 1 (1M) Re: [PATCH 3/4] perf list: Don't write to const memory
  2026-01-21 · Arnaldo Carvalho de Melo <acme@kernel.org> · 1 Reviewed-by
• STALE186d REVIEWED: 2 (0M) [PATCH linux-next] perf test: Fix test perf evlist for z/VM s390x
  2026-01-26 · Thomas Richter <hidden> · 1 Reviewed-by, 1 Tested-by
• STALE185d REVIEWED: 1 (0M) [PATCH v11 01/35] perf jevents: Build support for generating metrics from python
  2026-01-27 · Ian Rogers <irogers@google.com> · 1 Tested-by
• STALE185d REVIEWED: 1 (0M) [PATCH v11 02/35] perf jevents: Add load event json to verify and allow fallbacks
  2026-01-27 · Ian Rogers <irogers@google.com> · 1 Tested-by
• STALE185d REVIEWED: 1 (0M) [PATCH v11 06/35] perf jevents: Add br metric group for branch statistics on AMD
  2026-01-27 · Ian Rogers <irogers@google.com> · 1 Reviewed-by
• STALE185d REVIEWED: 1 (0M) [PATCH v11 10/35] perf jevents: Add load store breakdown metrics ldst for AMD
  2026-01-27 · Ian Rogers <irogers@google.com> · 1 Reviewed-by
• STALE185d REVIEWED: 1 (0M) [PATCH v11 14/35] perf jevents: Add CheckPmu to see if a PMU is in loaded json events
  2026-01-27 · Ian Rogers <irogers@google.com> · 1 Tested-by
• STALE185d REVIEWED: 1 (0M) [PATCH v11 16/35] perf jevents: Mark metrics with experimental events as experimental
  2026-01-27 · Ian Rogers <irogers@google.com> · 1 Tested-by
• STALE185d REVIEWED: 1 (0M) [PATCH v11 18/35] perf jevents: Add br metric group for branch statistics on Intel
  2026-01-27 · Ian Rogers <irogers@google.com> · 1 Tested-by
• STALE185d REVIEWED: 1 (0M) [PATCH v11 19/35] perf jevents: Add software prefetch (swpf) metric group for Intel
  2026-01-27 · 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.

• STALE205d [PATCH v1 1/2] perf tool_pmu: Add memory events
  2026-01-04 · Ian Rogers <irogers@google.com>
• STALE205d [PATCH v1 2/2] perf tool_pmu: Add network events
  2026-01-04 · Ian Rogers <irogers@google.com>
• STALE206d [PATCH v4 1/8] perf/uapi: Extend data source fields
  2026-01-06 · Leo Yan <leo.yan@arm.com>
• STALE206d [PATCH v4 3/8] perf mem: Print extended fields
  2026-01-06 · Leo Yan <leo.yan@arm.com>
• STALE206d [PATCH v4 4/8] perf arm_spe: Set extended fields in data source
  2026-01-06 · Leo Yan <leo.yan@arm.com>
• STALE206d [PATCH v4 5/8] perf sort: Support sort ASE and SME
  2026-01-06 · Leo Yan <leo.yan@arm.com>
• STALE206d [PATCH v4 6/8] perf sort: Sort disabled and full predicated flags
  2026-01-06 · Leo Yan <leo.yan@arm.com>
• STALE206d [PATCH v4 7/8] perf report: Update document for SIMD flags
  2026-01-06 · Leo Yan <leo.yan@arm.com>
• DORMANTno replies [PATCH v4 8/8] perf arm_spe: Improve SIMD flags setting
  2026-01-06 · Leo Yan <leo.yan@arm.com>
• STALE199d [PATCH 1/4] perf vendor events amd: Add Zen 6 core events
  2026-01-08 · Sandipan Das <hidden>