On Thu, Apr 3, 2025 at 1:24 PM Ian Rogers <irog...@google.com> wrote: > > DRM clients expose information through usage stats as documented in > Documentation/gpu/drm-usage-stats.rst (available online at > https://docs.kernel.org/gpu/drm-usage-stats.html). Add a tool like > PMU, similar to the hwmon PMU, that exposes DRM information.
I'm reminded by Brendan Gregg's new blog: https://www.brendangregg.com/blog/2025-05-01/doom-gpu-flame-graphs.html that this is still outstanding. The patches also reduce some directory scanning for the hwmon "PMU", they are in Google's tree: https://github.com/googleprodkernel/linux-perf/blob/google_tools_master/tools/perf/util/drm_pmu.c Thanks, Ian > v3: Minor tweak to the test so the skip (exit 2) doesn't trigger the > trap cleanup. > > v2: Add support to only scan hwmon and drm PMUs if the event or PMU > wildcard can match. Add a test as requested by Namhyung. Add file > comments. > > v1: > https://lore.kernel.org/lkml/20250211071727.364389-1-irog...@google.com/ > > Ian Rogers (4): > perf parse-events: Avoid scanning PMUs that can't contain events > perf parse-events: Avoid scanning PMUs that can't match a wildcard > perf drm_pmu: Add a tool like PMU to expose DRM information > perf tests: Add a DRM PMU test > > tools/perf/tests/shell/drm_pmu.sh | 78 ++++ > tools/perf/util/Build | 1 + > tools/perf/util/drm_pmu.c | 689 ++++++++++++++++++++++++++++++ > tools/perf/util/drm_pmu.h | 39 ++ > tools/perf/util/evsel.c | 9 + > tools/perf/util/parse-events.c | 30 +- > tools/perf/util/pmu.c | 15 + > tools/perf/util/pmu.h | 4 +- > tools/perf/util/pmus.c | 101 ++++- > tools/perf/util/pmus.h | 2 + > 10 files changed, 952 insertions(+), 16 deletions(-) > create mode 100755 tools/perf/tests/shell/drm_pmu.sh > create mode 100644 tools/perf/util/drm_pmu.c > create mode 100644 tools/perf/util/drm_pmu.h > > -- > 2.49.0.504.g3bcea36a83-goog >
