Keep the engine-pm awake until the next jiffie, to avoid immediate ping-pong under moderate load. (Forcing the idle barrier excerbates the moderate load, dramatically increasing the driver overhead.) On the other hand, delaying the idle-barrier slightly incurs longer rc6-off and so more power consumption.
Closes: https://gitlab.freedesktop.org/drm/intel/issues/848 Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk> --- drivers/gpu/drm/i915/gt/intel_context.c | 2 +- drivers/gpu/drm/i915/i915_active.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/intel_context.c b/drivers/gpu/drm/i915/gt/intel_context.c index 7132bf616cc4..be4bb62425ca 100644 --- a/drivers/gpu/drm/i915/gt/intel_context.c +++ b/drivers/gpu/drm/i915/gt/intel_context.c @@ -350,7 +350,7 @@ void intel_context_enter_engine(struct intel_context *ce) void intel_context_exit_engine(struct intel_context *ce) { intel_timeline_exit(ce->timeline); - intel_engine_pm_put(ce->engine); + intel_engine_pm_put_delay(ce->engine, 1); } int intel_context_prepare_remote_request(struct intel_context *ce, diff --git a/drivers/gpu/drm/i915/i915_active.c b/drivers/gpu/drm/i915/i915_active.c index c4048628188a..a0d31f7bfb42 100644 --- a/drivers/gpu/drm/i915/i915_active.c +++ b/drivers/gpu/drm/i915/i915_active.c @@ -818,7 +818,7 @@ void i915_active_acquire_barrier(struct i915_active *ref) GEM_BUG_ON(!intel_engine_pm_is_awake(engine)); llist_add(barrier_to_ll(node), &engine->barrier_tasks); - intel_engine_pm_put(engine); + intel_engine_pm_put_delay(engine, 1); } } -- 2.20.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
