diff options
| -rw-r--r-- | drivers/gpu/drm/i915/gt/uc/intel_guc.h | 8 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 13 |
2 files changed, 21 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h index 966e69a8b1c1..d0d99f178f2d 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h @@ -230,6 +230,14 @@ struct intel_guc { * @shift: Right shift value for the gpm timestamp */ u32 shift; + + /** + * @last_stat_jiffies: jiffies at last actual stats collection time + * We use this timestamp to ensure we don't oversample the + * stats because runtime power management events can trigger + * stats collection at much higher rates than required. + */ + unsigned long last_stat_jiffies; } timestamp; #ifdef CONFIG_DRM_I915_SELFTEST diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c index e62ea35513ea..c9f167b80910 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c @@ -1314,6 +1314,8 @@ static void __update_guc_busyness_stats(struct intel_guc *guc) unsigned long flags; ktime_t unused; + guc->timestamp.last_stat_jiffies = jiffies; + spin_lock_irqsave(&guc->timestamp.lock, flags); guc_update_pm_timestamp(guc, &unused); @@ -1386,6 +1388,17 @@ void intel_guc_busyness_park(struct intel_gt *gt) return; cancel_delayed_work(&guc->timestamp.work); + + /* + * Before parking, we should sample engine busyness stats if we need to. + * We can skip it if we are less than half a ping from the last time we + * sampled the busyness stats. + */ + if (guc->timestamp.last_stat_jiffies && + !time_after(jiffies, guc->timestamp.last_stat_jiffies + + (guc->timestamp.ping_delay / 2))) + return; + __update_guc_busyness_stats(guc); } |