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 v8 00/22] Add Counter delegation ISA extension support
  2026-07-01 08:49 · 3 replies in 7d · Atish Patra <atish.patra@linux.dev>

Recent patches

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

• HOTtoday [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>
• HOTtoday [PATCH v8 19/22] tools/perf: Support event code for arch standard events
  2026-07-01 · Atish Patra <atish.patra@linux.dev>
• HOTtoday [PATCH v8 20/22] tools/perf: Add RISC-V CounterIDMask event field
  2026-07-01 · Atish Patra <atish.patra@linux.dev>
• COOLING9d [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>
• COOLING9d [PATCH v7 19/22] tools/perf: Support event code for arch standard events
  2026-06-22 · Atish Patra <atish.patra@linux.dev>
• COOLING9d [PATCH v7 20/22] tools/perf: Add RISC-V CounterIDMask event field
  2026-06-22 · Atish Patra <atish.patra@linux.dev>
• COOLING7d [PATCH v6 21/21] TEST(do-not-upstream): fake qemu vendor JSON + mapfile entry for CounterIDMask path
  2026-06-09 · Atish Patra <atish.patra@linux.dev>
• COOLING7d [PATCH v6 19/21] tools/perf: Add RISC-V CounterIDMask event field
  2026-06-09 · Atish Patra <atish.patra@linux.dev>
• COOLING7d [PATCH v6 18/21] tools/perf: Support event code for arch standard events
  2026-06-09 · Atish Patra <atish.patra@linux.dev>
• COLD29d [PATCH v4 11/12] perf tools: Initial support for RISC-V trace decoder
  2026-04-29 · Anup Patel <hidden>
• COLD29d REVIEWED: 1 (0M) [PATCH v4 10/12] perf tools: Add RISC-V trace PMU record capabilities
  2026-04-29 · Anup Patel <hidden>
• DORMANTno replies [PATCH v5 8/8] perf vendor events riscv: Add SpacemiT T100 HPM event aliases
  2026-02-28 · Lv Zheng <hidden>
• STALE65d [PATCH v3 11/12] perf tools: Initial support for RISC-V trace decoder
  2026-02-25 · Anup Patel <hidden>
• STALE65d REVIEWED: 1 (0M) [PATCH v3 10/12] perf tools: Add RISC-V trace PMU record capabilities
  2026-02-25 · Anup Patel <hidden>
• DORMANTno replies [PATCH v4 7/7] perf vendor events riscv:: Add support for spacemit,riscv-iommu HPM aliasing
  2026-02-05 · Lv Zheng <hidden>
• STALE146d [PATCH v3 8/8] perf vendor events riscv:: Add support for spacemit,riscv-iommu HPM aliasing
  2026-02-04 · Lv Zheng <hidden>
• STALE222d [PATCH v2 4/4] perf vendor events riscv: Add XuanTie C930 metrics
  2025-11-21 · <hidden>
• STALE222d [PATCH v2 3/4] perf vendor events riscv: Add XuanTie C930 JSON file
  2025-11-21 · <hidden>
• STALE142d [PATCH v2 11/12] perf tools: Initial support for RISC-V trace decoder
  2025-11-01 · Anup Patel <hidden>
• STALE142d [PATCH v2 10/12] perf tools: Add RISC-V trace PMU record capabilities
  2025-11-01 · Anup Patel <hidden>
• STALE110d [PATCH 10/11] perf tools: Initial support for RISC-V trace decoder
  2025-10-02 · Anup Patel <hidden>
• STALE110d [PATCH 09/11] perf tools: Add RISC-V trace PMU record capabilities
  2025-10-02 · Anup Patel <hidden>
• STALE280d [PATCH v5 3/7] tools: arm64: Add Cortex-A720AE definitions
  2025-09-18 · Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
• STALE286d [PATCH v4 3/5] tools: arm64: Add Cortex-A725AE definitions
  2025-09-17 · Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
• STALE286d [PATCH v3 3/6] arm64: cputype: Add Cortex-A720AE definitions
  2025-09-16 · Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
• STALE236d REVIEWED: 15 (15M) [PATCH v2 3/5] perf vendor events arm64:: Add i.MX94 DDR Performance Monitor metrics
  2025-08-21 · Xu Yang <xu.yang_2@nxp.com>
• STALE317d REVIEWED: 2 (2M) [PATCH 3/5] perf vendor events arm64:: Add i.MX94 DDR Performance Monitor metrics
  2025-08-15 · Xu Yang <xu.yang_2@nxp.com>
• STALE400d [PATCH v3 1/7] perf: Increase the maximum number of branches remove_loops() can process.
  2025-05-22 · Rajnesh Kanwal <hidden>
• STALE432d Re: [PATCH v12 06/28] riscv/mm : ensure PROT_WRITE leads to VM_READ | VM_WRITE
  2025-04-24 · "Arnd Bergmann" <arnd@arndb.de>
• STALE281d [PATCH v5 21/21] Sync empty-pmu-events.c with autogenerated one
  2025-03-27 · Atish Patra <hidden>

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.

• DORMANTno replies [PATCH v4 7/7] perf vendor events riscv:: Add support for spacemit,riscv-iommu HPM aliasing
  2026-02-05 · Lv Zheng <hidden>
• DORMANTno replies [PATCH v5 8/8] perf vendor events riscv: Add SpacemiT T100 HPM event aliases
  2026-02-28 · Lv Zheng <hidden>