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Commit c713cb2f authored by Ping Gao's avatar Ping Gao Committed by Zhenyu Wang
Browse files

drm/i915/gvt: Support event based scheduling 



This patch decouple the time slice calculation and scheduler, let
other event be able to trigger scheduling without impact the
calculation for QoS.

v2: add only one new enum definition.
v3: fix typo.

Signed-off-by: default avatarPing Gao <ping.a.gao@intel.com>
Signed-off-by: default avatarZhenyu Wang <zhenyuw@linux.intel.com>
parent 089f93c3

drivers/gpu/drm/i915/gvt/gvt.c

+3 −1
Original line number Diff line number Diff line
@@ -147,7 +147,9 @@ static int gvt_service_thread(void *data) 
			mutex_unlock(&gvt->lock);

		}



		if (test_and_clear_bit(INTEL_GVT_REQUEST_SCHED,

		if (test_bit(INTEL_GVT_REQUEST_SCHED,

				(void *)&gvt->service_request) ||

			test_bit(INTEL_GVT_REQUEST_EVENT_SCHED,

					(void *)&gvt->service_request)) {

			intel_gvt_schedule(gvt);

		}

drivers/gpu/drm/i915/gvt/gvt.h

+5 −0
Original line number Diff line number Diff line
@@ -256,7 +256,12 @@ static inline struct intel_gvt *to_gvt(struct drm_i915_private *i915) 


enum {

	INTEL_GVT_REQUEST_EMULATE_VBLANK = 0,



	/* Scheduling trigger by timer */

	INTEL_GVT_REQUEST_SCHED = 1,



	/* Scheduling trigger by event */

	INTEL_GVT_REQUEST_EVENT_SCHED = 2,

};



static inline void intel_gvt_request_service(struct intel_gvt *gvt,

drivers/gpu/drm/i915/gvt/sched_policy.c

+10 −5
Original line number Diff line number Diff line
@@ -198,11 +198,6 @@ static void tbs_sched_func(struct gvt_sched_data *sched_data) 
	struct intel_gvt_workload_scheduler *scheduler = &gvt->scheduler;

	struct vgpu_sched_data *vgpu_data;

	struct intel_vgpu *vgpu = NULL;

	static uint64_t timer_check;



	if (!(timer_check++ % GVT_TS_BALANCE_PERIOD_MS))

		gvt_balance_timeslice(sched_data);



	/* no active vgpu or has already had a target */

	if (list_empty(&sched_data->lru_runq_head) || scheduler->next_vgpu)

		goto out;
@@ -227,9 +222,19 @@ static void tbs_sched_func(struct gvt_sched_data *sched_data) 
void intel_gvt_schedule(struct intel_gvt *gvt)

{

	struct gvt_sched_data *sched_data = gvt->scheduler.sched_data;

	static uint64_t timer_check;



	mutex_lock(&gvt->lock);



	if (test_and_clear_bit(INTEL_GVT_REQUEST_SCHED,

				(void *)&gvt->service_request)) {

		if (!(timer_check++ % GVT_TS_BALANCE_PERIOD_MS))

			gvt_balance_timeslice(sched_data);

	}

	clear_bit(INTEL_GVT_REQUEST_EVENT_SCHED, (void *)&gvt->service_request);



	tbs_sched_func(sched_data);



	mutex_unlock(&gvt->lock);

}