From: Michał Winiarski <michal.winiarski@xxxxxxxxx>
Avoid the repeated rbtree lookup for each request as we unwind them by
tracking the last priolist.
v2: Fix up my unhelpful suggestion of using default_priolist.
Signed-off-by: Michał Winiarski <michal.winiarski@xxxxxxxxx>
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_lrc.c | 20 +++++++++++++-------
1 file changed, 13 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 303bb2c0b3ce..7d6da130b184 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -358,25 +358,31 @@ static void unwind_wa_tail(struct drm_i915_gem_request *rq)
static void unwind_incomplete_requests(struct intel_engine_cs *engine)
{
struct drm_i915_gem_request *rq, *rn;
+ struct i915_priolist *uninitialized_var(p);
+ int last_prio = I915_PRIORITY_INVALID;
lockdep_assert_held(&engine->timeline->lock);
list_for_each_entry_safe_reverse(rq, rn,
&engine->timeline->requests,
link) {
- struct i915_priolist *p;
-
if (i915_gem_request_completed(rq))
return;
__i915_gem_request_unsubmit(rq);
unwind_wa_tail(rq);
- p = lookup_priolist(engine,
- &rq->priotree,
- rq->priotree.priority);
- list_add(&rq->priotree.link,
- &ptr_mask_bits(p, 1)->requests);
+ GEM_BUG_ON(rq->priotree.priority == I915_PRIORITY_INVALID);
+ if (rq->priotree.priority != last_prio) {
+ p = lookup_priolist(engine,
+ &rq->priotree,
+ rq->priotree.priority);
+ p = ptr_mask_bits(p, 1);
+
+ last_prio = rq->priotree.priority;
+ }
+
+ list_add(&rq->priotree.link, &p->requests);
}
}
--
2.14.2
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