kernel/git/next/linux-next.git/tools/perf/pmu-events, branch master

perf jevents: Add mesh bandwidth saturation for CWF, EMR, GRR, SNR, SPR, SRF

2026-09-14T00:43:20+00:00

Extend the mesh bandwidth saturation's list of events to include events from clearwaterforest, emeraldrapids, grandridge, graniterapids, sapphirerapids and sierraforest. This makes the lpm_mem_sat metric available for those CPU models. Signed-off-by: Ian Rogers Signed-off-by: Arnaldo Carvalho de Melo

perf vendor events arm64: Fix Tegra410 Olympus event 0x0197

2026-08-18T21:31:18+00:00

The name and description for NVIDIA Tegra410 Olympus implementation-defined event 0x0197 incorrectly indicate a TXREQ limit between one quarter and one half. Correct them to describe a TXREQ limit below one half. Fixes: 86ff690f45cc ("perf vendor events arm64: Add Tegra410 Olympus PMU events") Signed-off-by: Besar Wicaksono Reviewed-by: Ian Rogers Signed-off-by: Namhyung Kim

perf vendor events arm64: fix swapped MetricGroup for Tegra410 L1 prefetcher metrics

2026-08-18T21:31:18+00:00

The L1D prefetcher metrics (l1d_cache_rw_miss_ratio, l1d_demand_accesses, etc.) were incorrectly assigned to MetricGroup "L1I_Prefetcher_Effectiveness" and vice versa. This causes 'perf stat --metric-group L1D_Prefetcher_Effectiveness' to display L1I metrics, which is misleading. Swap the MetricGroup assignments so L1D metrics are in the L1D group and L1I metrics are in the L1I group. Fixes: 86ff690f45cc ("perf vendor events arm64: Add Tegra410 Olympus PMU events") Signed-off-by: Saurav Sachidanand Reviewed-by: Besar Wicaksono Reviewed-by: Ian Rogers Signed-off-by: Namhyung Kim

perf vendor events intel: Fix Novalake CPUID regex in mapfile.csv

2026-08-04T17:08:48+00:00

Based on offline discussion with Intel in lore.kernel.org/20260715211144.3144895-1-ctshao@google.com, we decided to drop the leading zero from Nova Lake models 0x01 and 0x03 in mapfile.csv to match single-digit model numbers without zero padding (GenuineIntel-18-[13]). The updated mapfile entry was published in: github.com/intel/perfmon/commit/00167baed45ac3b2708e89dbf1b9ce4769e9d115 Signed-off-by: Chun-Tse Shao Reviewed-by: Dapeng Mi Signed-off-by: Namhyung Kim

perf pmu-events: Fix typo in idle-cycles-frontend description

2026-08-03T18:08:17+00:00

The brief description of the idle-cycles-frontend legacy hardware event refers to its alias as "stalled-cycles-fronted", but there is no such event. The correct event name is "stalled-cycles-frontend". This typo is visible in the output of "perf list", for example: idle-cycles-frontend [Stalled cycles during issue [This event is an alias of stalled-cycles-fronted]. Unit: armv8_pmuv3] Fix the spelling so that the description points to the valid event name. Signed-off-by: Pu Hu Signed-off-by: Namhyung Kim

perf pmu-events: Parallelize JSON and metric pre-computation in jevents.py

2026-07-24T05:59:42+00:00

Currently, jevents.py parses hundreds of JSON event and metric files sequentially across all CPU architectures during Kbuild startup, taking ~3.5 seconds of single-core execution time. Refactor jevents.py to pre-populate its internal JSON AST cache in parallel across all available CPU cores using ProcessPoolExecutor. First gather all the paths with ftw and collect_json, then spawn _parallel_read_json_events that starts workers to just read the json events. Define the worker process initializer _init_worker so that _arch_std_events is available under spawn multiprocessing semantics. This accelerates the JSON parsing phase by over 10x (from ~3.0s down to ~290ms), reducing overall jevents.py execution time by 3.5x (from ~3.56s down to ~1.03s). Tested-by: James Clark Assisted-by: Gemini:gemini-3.1-pro-preview Signed-off-by: Ian Rogers Signed-off-by: Namhyung Kim

perf jevents metric: Add python type annotations

2026-07-16T18:23:56+00:00

Make mypy clean. Signed-off-by: Ian Rogers Signed-off-by: Namhyung Kim

perf jevents: Add python type annotations

2026-07-16T18:23:56+00:00

Make mypy clean. Signed-off-by: Ian Rogers Signed-off-by: Namhyung Kim

perf jevents: Add more components to the metric sorting order

2026-07-15T23:50:16+00:00

Nazar Kazakov reported non-deterministic builds due to the metrics being reordered in the jevents.py output. The metrics were largely only being sorted by name, add in the expressions and descriptions. Reported-by: Nazar Kazakov Closes: https://lore.kernel.org/linux-perf-users/20260706175624.692736-1-nazar.kazakov@codethink.co.uk/ Fixes: 40769665b63d ("perf jevents: Parse metrics during conversion") Tested-by: Nazar Kazakov Signed-off-by: Ian Rogers Signed-off-by: Namhyung Kim

perf vendor events intel: Update emeraldrapids metrics

2026-07-15T18:23:20+00:00

The updated events were published in: https://github.com/intel/perfmon/commit/240735b7d8e0b50fe8f4a64e08399df13cb87ae6 Signed-off-by: Chun-Tse Shao Reviewed-by: Dapeng Mi Signed-off-by: Namhyung Kim