From: Changbin Du Date: Wed, 29 Nov 2017 07:40:07 +0000 (+0800) Subject: drm/i915/gvt: Kick scheduler when new workload queued X-Git-Tag: v5.15~6763^2~28^2~2039^2~21 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c130456cefd4cf9531f12f3e9b23805d34706ac0;p=platform%2Fkernel%2Flinux-starfive.git drm/i915/gvt: Kick scheduler when new workload queued The current schedule policy rely on a 1ms timer to execute workload. This can introduce maximum 1ms unnecessary latency. This is especially bad for small media workloads. And I don't think we need this timer for QoS, but the change is not simply remove the code. So I made a new API intel_gvt_kick_schedule() for future change. Signed-off-by: Changbin Du Signed-off-by: Zhenyu Wang --- diff --git a/drivers/gpu/drm/i915/gvt/sched_policy.c b/drivers/gpu/drm/i915/gvt/sched_policy.c index 03532dfc..eea1a2f 100644 --- a/drivers/gpu/drm/i915/gvt/sched_policy.c +++ b/drivers/gpu/drm/i915/gvt/sched_policy.c @@ -372,6 +372,11 @@ void intel_vgpu_start_schedule(struct intel_vgpu *vgpu) vgpu->gvt->scheduler.sched_ops->start_schedule(vgpu); } +void intel_gvt_kick_schedule(struct intel_gvt *gvt) +{ + intel_gvt_request_service(gvt, INTEL_GVT_REQUEST_EVENT_SCHED); +} + void intel_vgpu_stop_schedule(struct intel_vgpu *vgpu) { struct intel_gvt_workload_scheduler *scheduler = diff --git a/drivers/gpu/drm/i915/gvt/sched_policy.h b/drivers/gpu/drm/i915/gvt/sched_policy.h index ba00a5f..7b59e3e 100644 --- a/drivers/gpu/drm/i915/gvt/sched_policy.h +++ b/drivers/gpu/drm/i915/gvt/sched_policy.h @@ -57,4 +57,6 @@ void intel_vgpu_start_schedule(struct intel_vgpu *vgpu); void intel_vgpu_stop_schedule(struct intel_vgpu *vgpu); +void intel_gvt_kick_schedule(struct intel_gvt *gvt); + #endif diff --git a/drivers/gpu/drm/i915/gvt/scheduler.c b/drivers/gpu/drm/i915/gvt/scheduler.c index abf71be..76d2812 100644 --- a/drivers/gpu/drm/i915/gvt/scheduler.c +++ b/drivers/gpu/drm/i915/gvt/scheduler.c @@ -1337,5 +1337,6 @@ void intel_vgpu_queue_workload(struct intel_vgpu_workload *workload) { list_add_tail(&workload->list, workload_q_head(workload->vgpu, workload->ring_id)); + intel_gvt_kick_schedule(workload->vgpu->gvt); wake_up(&workload->vgpu->gvt->scheduler.waitq[workload->ring_id]); }