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Commit ae157902 authored by Ping Gao's avatar Ping Gao Committed by Zhenyu Wang
Browse files

drm/i915/gvt: avoid unnecessary vgpu switch 



It's no need to switch vgpu if next vgpu is the same with current
vgpu, otherwise it will make performance drop in some case.

v2: correct the comments.

Signed-off-by: default avatarPing Gao <ping.a.gao@intel.com>
Signed-off-by: default avatarZhenyu Wang <zhenyuw@linux.intel.com>
parent 2345ab1d

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

+6 −2
Original line number Diff line number Diff line
@@ -53,9 +53,13 @@ static void try_to_schedule_next_vgpu(struct intel_gvt *gvt) 
	enum intel_engine_id i;

	struct intel_engine_cs *engine;



	/* no target to schedule */

	if (!scheduler->next_vgpu)

	/* no need to schedule if next_vgpu is the same with current_vgpu,

	 * let scheduler chose next_vgpu again by setting it to NULL.

	 */

	if (scheduler->next_vgpu == scheduler->current_vgpu) {

		scheduler->next_vgpu = NULL;

		return;

	}



	gvt_dbg_sched("try to schedule next vgpu %d\n",

			scheduler->next_vgpu->id);