30e17b7847
Track total time requests have been executing on the hardware. We add new kernel API to allow software tracking of time GPU engines are spending executing requests. Both per-engine and global API is added with the latter also being exported for use by external users. v2: * Squashed with the internal API. * Dropped static key. * Made per-engine. * Store time in monotonic ktime. v3: Moved stats clearing to disable. v4: * Comments. * Don't export the API just yet. v5: Whitespace cleanup. v6: * Rename ref to active. * Drop engine aggregate stats for now. * Account initial busy period after enabling stats. v7: * Rebase. v8: * Move context in notification after the notifier. (Chris Wilson) v9: In cases where stats tracking is getting disabled while there is an active context on an engine, add up the current value to the total. This also implies we don't clear the total when tracking is disabled any longer. There is no real need to do so because we define the stats as relative while enabled, meaning comparison between two samples while tracking is enabled is the valid usage. However, when busy stats will later be plugged into the perf PMU API, it is beneficial to not reset the total, since the PMU core likes to do some counter disable/enable cycles on startup, and while doing so during a single long context executing on an engine we would lose some accuracy and so make unit testing more difficult than needs to be. v10: * Fix accounting for preemption. v11: * Rebase for i915_modparams.enable_execlists removal. Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20171121181852.16128-5-tvrtko.ursulin@linux.intel.com |
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| drm | ||
| host1x | ||
| ipu-v3 | ||
| vga | ||
| Makefile | ||