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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2020-06-17 16:09:16 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2020-06-18 11:26:54 +0300 |
| commit | 810b7ee3008ab2ac94791f75857815484c2f9cce (patch) | |
| tree | 85ff11b677567a5670ccd63e5ba00a1d22994c81 /drivers/gpu/drm/i915/gt/intel_engine.h | |
| parent | 1b90e4a43b7444fc4159c6dd338a44e8808e8718 (diff) | |
| download | linux-810b7ee3008ab2ac94791f75857815484c2f9cce.tar.xz | |
drm/i915/gt: Always report the sample time for busy-stats
Return the monotonic timestamp (ktime_get()) at the time of sampling the
busy-time. This is used in preference to taking ktime_get() separately
before or after the read seqlock as there can be some large variance in
reported timestamps. For selftests trying to ascertain that we are
reporting accurate to within a few microseconds, even a small delay
leads to the test failing.
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/20200617130916.15261-2-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/gt/intel_engine.h')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_engine.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_engine.h b/drivers/gpu/drm/i915/gt/intel_engine.h index 791897f8d847..a9249a23903a 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine.h +++ b/drivers/gpu/drm/i915/gt/intel_engine.h @@ -334,7 +334,8 @@ void intel_engine_dump(struct intel_engine_cs *engine, struct drm_printer *m, const char *header, ...); -ktime_t intel_engine_get_busy_time(struct intel_engine_cs *engine); +ktime_t intel_engine_get_busy_time(struct intel_engine_cs *engine, + ktime_t *now); struct i915_request * intel_engine_find_active_request(struct intel_engine_cs *engine); |