From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx> Rough sketch of the idea I mentioned a few times to various people - merging the engine busyness tracking with Chris i915 PMU RFC. First patch is the actual PMU RFC by Chris. It is followed by some cleanup patches, then come a few improvements, cheap execlists engine busyness tracking, debugfs view for the same, and finally the i915 PMU is extended to use this instead of timer based mmio sampling. This makes it cheaper and also more accurate since engine busyness is not derived via sampling. But I haven't figure out the perf API yet. For example is it possible to access our events in an usable fashion via perf top/stat or something? Do we want to make the events discoverable as I did (patch 8). I could not find much (any?) kernel API level documentation for perf. Btw patch series actually works since intel-gpu-overlay can use these events when they are available. Chris Wilson (1): RFC drm/i915: Expose a PMU interface for perf queries Tvrtko Ursulin (13): drm/i915/pmu: Add VCS2 engine to the PMU uAPI drm/i915/pmu: Add queued samplers to the PMU uAPI drm/i915/pmu: Decouple uAPI engine ids drm/i915/pmu: Helper to extract engine and sampler from PMU config drm/i915/pmu: Only sample enabled samplers drm/i915/pmu: Add fake regs drm/i915/pmu: Expose events in sysfs drm/i915/pmu: Suspend sampling when GPU is idle drm/i915: Wrap context schedule notification drm/i915: Engine busy time tracking drm/i915: Interface for controling engine stats collection drm/i915: Export engine busy stats in debugfs drm/i915/pmu: Wire up engine busy stats to PMU drivers/gpu/drm/i915/Makefile | 1 + drivers/gpu/drm/i915/i915_debugfs.c | 89 ++++ drivers/gpu/drm/i915/i915_drv.c | 2 + drivers/gpu/drm/i915/i915_drv.h | 32 ++ drivers/gpu/drm/i915/i915_gem.c | 1 + drivers/gpu/drm/i915/i915_gem_request.c | 1 + drivers/gpu/drm/i915/i915_pmu.c | 697 ++++++++++++++++++++++++++++++++ drivers/gpu/drm/i915/intel_engine_cs.c | 59 +++ drivers/gpu/drm/i915/intel_lrc.c | 19 +- drivers/gpu/drm/i915/intel_ringbuffer.h | 46 +++ include/uapi/drm/i915_drm.h | 51 +++ kernel/events/core.c | 1 + 12 files changed, 996 insertions(+), 3 deletions(-) create mode 100644 drivers/gpu/drm/i915/i915_pmu.c -- 2.9.4 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
