diff options
| author | Ping Gao <ping.a.gao@intel.com> | 2017-04-19 14:02:31 +0800 |
|---|---|---|
| committer | Zhenyu Wang <zhenyuw@linux.intel.com> | 2017-05-10 11:14:10 +0800 |
| commit | ae157902aea13926e9596d091cad6bd87b3be084 (patch) | |
| tree | 51fdf444cea44fc1617562b89c98f1e8abac505c /drivers/gpu/drm/i915 | |
| parent | 2345ab1df8a9aa3cdca942142b48eb141faeb1c3 (diff) | |
| download | linux-0-day-ae157902aea13926e9596d091cad6bd87b3be084.tar.gz linux-0-day-ae157902aea13926e9596d091cad6bd87b3be084.tar.xz | |
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: Ping Gao <ping.a.gao@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/gvt/sched_policy.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/gvt/sched_policy.c b/drivers/gpu/drm/i915/gvt/sched_policy.c index 34b9acdf34791..6ac77f8cc405d 100644 --- a/drivers/gpu/drm/i915/gvt/sched_policy.c +++ b/drivers/gpu/drm/i915/gvt/sched_policy.c @@ -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); |