drm/i915/gvt: control the scheduler by timeslice usage
The timeslice usage will determine vGPU whether has chance to
schedule or not at every vGPU switch checkpoint.
Signed-off-by: Ping Gao <ping.a.gao@intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
diff --git a/drivers/gpu/drm/i915/gvt/sched_policy.c b/drivers/gpu/drm/i915/gvt/sched_policy.c
index dd5b38c..f849591 100644
--- a/drivers/gpu/drm/i915/gvt/sched_policy.c
+++ b/drivers/gpu/drm/i915/gvt/sched_policy.c
@@ -187,8 +187,11 @@
if (!vgpu_has_pending_workload(vgpu_data->vgpu))
continue;
- vgpu = vgpu_data->vgpu;
- break;
+ /* Return the vGPU only if it has time slice left */
+ if (vgpu_data->left_ts > 0) {
+ vgpu = vgpu_data->vgpu;
+ break;
+ }
}
return vgpu;
@@ -223,6 +226,8 @@
&sched_data->lru_runq_head);
gvt_dbg_sched("pick next vgpu %d\n", vgpu->id);
+ } else {
+ scheduler->next_vgpu = gvt->idle_vgpu;
}
out:
if (scheduler->next_vgpu) {