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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>
This commit is contained in:
Ping Gao 2017-03-30 00:36:40 +08:00 committed by Zhenyu Wang
parent afe04fbe6c
commit b35f34d1da
1 changed files with 7 additions and 2 deletions
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9
drivers/gpu/drm/i915/gvt/sched_policy.c
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@ -187,8 +187,11 @@ static struct intel_vgpu *find_busy_vgpu(struct gvt_sched_data *sched_data)
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 @@ static void tbs_sched_func(struct gvt_sched_data *sched_data)
&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) {