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| author | Tvrtko Ursulin <tvrtko.ursulin@intel.com> | 2017-11-21 19:18:46 +0100 |
|---|---|---|
| committer | Tvrtko Ursulin <tvrtko.ursulin@intel.com> | 2017-11-22 12:25:00 +0100 |
| commit | feff0dc6cdc527f8a6fd170d8de7966f56890fc0 (patch) | |
| tree | d161e7caedcb4e0b7bbb65159cd1ef417acc8f01 /drivers/gpu/drm/i915/i915_pmu.h | |
| parent | drm/i915/pmu: Expose a PMU interface for perf queries (diff) | |
| download | linux-feff0dc6cdc527f8a6fd170d8de7966f56890fc0.tar.xz linux-feff0dc6cdc527f8a6fd170d8de7966f56890fc0.zip | |
drm/i915/pmu: Suspend sampling when GPU is idle
If only a subset of events is enabled we can afford to suspend
the sampling timer when the GPU is idle and so save some cycles
and power.
v2: Rebase and limit timer even more.
v3: Rebase.
v4: Rebase.
v5: Skip action if perf PMU failed to register.
v6: Checkpatch cleanup.
v7:
* Add a common helper to start the timer if needed. (Chris Wilson)
* Add comment explaining bitwise logic in pmu_needs_timer.
v8: Fix some comments styles. (Chris Wilson)
v9: Rebase.
v10: Move function declarations to i915_pmu.h.
v11: Rename functions to i915_pmu_gt_(un)parked. (Chris Wilson)
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/20171121181852.16128-3-tvrtko.ursulin@linux.intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/i915_pmu.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_pmu.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_pmu.h b/drivers/gpu/drm/i915/i915_pmu.h index 1ac8b2e34607..e209783a4c5f 100644 --- a/drivers/gpu/drm/i915/i915_pmu.h +++ b/drivers/gpu/drm/i915/i915_pmu.h @@ -83,6 +83,10 @@ struct i915_pmu { */ unsigned int enable_count[I915_PMU_MASK_BITS]; /** + * @timer_enabled: Should the internal sampling timer be running. + */ + bool timer_enabled; + /** * @sample: Current and previous (raw) counters for sampling events. * * These counters are updated from the i915 PMU sampling timer. @@ -96,9 +100,13 @@ struct i915_pmu { #ifdef CONFIG_PERF_EVENTS void i915_pmu_register(struct drm_i915_private *i915); void i915_pmu_unregister(struct drm_i915_private *i915); +void i915_pmu_gt_parked(struct drm_i915_private *i915); +void i915_pmu_gt_unparked(struct drm_i915_private *i915); #else static inline void i915_pmu_register(struct drm_i915_private *i915) {} static inline void i915_pmu_unregister(struct drm_i915_private *i915) {} +static inline void i915_pmu_gt_parked(struct drm_i915_private *i915) {} +static inline void i915_pmu_gt_unparked(struct drm_i915_private *i915) {} #endif #endif |