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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2020-01-14 13:56:47 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2020-01-14 15:55:13 +0300 |
| commit | f4e9894b6952a2819937f363cd42e7cd7894a1e4 (patch) | |
| tree | 3d8d582cddca20cb900fa8e4f0daa6001ae33777 /LICENSES | |
| parent | f2221a50494037af98206713155c8d4f2e7bccaa (diff) | |
| download | linux-f4e9894b6952a2819937f363cd42e7cd7894a1e4.tar.xz | |
drm/i915/pmu: Correct the rc6 offset upon enabling
The rc6 residency starts ticking from 0 from BIOS POST, but the kernel
starts measuring the time from its boot. If we start measuruing
I915_PMU_RC6_RESIDENCY while the GT is idle, we start our sampling from
0 and then upon first activity (park/unpark) add in all the rc6
residency since boot. After the first park with the sampler engaged, the
sleep/active counters are aligned.
v2: With a wakeref to be sure
Closes: https://gitlab.freedesktop.org/drm/intel/issues/973
Fixes: df6a42053513 ("drm/i915/pmu: Ensure monotonic rc6")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200114105648.2172026-1-chris@chris-wilson.co.uk
Diffstat (limited to 'LICENSES')
0 files changed, 0 insertions, 0 deletions