If the request is still waiting on external fences, it has not yet been
submitted to the HW queue and so we can forgo kicking the submission
tasklet when re-evaluating its priority.
This should have no impact other than reducing the number of tasklet
wakeups under signal heavy workloads (e.g. switching between engines).
v2: Use prebaked container_of()
References: f6322eddaff7 ("drm/i915/preemption: Allow preemption between
submission ports")
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
Cc: Michał Winiarski <michal.winiar...@intel.com>
Cc: Michel Thierry <michel.thie...@intel.com>
Cc: Mika Kuoppala <mika.kuopp...@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursu...@intel.com>
---
drivers/gpu/drm/i915/intel_lrc.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index b4ab06b05e58..104b69e0494f 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -1051,12 +1051,16 @@ static void queue_request(struct intel_engine_cs
*engine,
list_add_tail(&pt->link, &lookup_priolist(engine, pt, prio)->requests);
}
-static void submit_queue(struct intel_engine_cs *engine, int prio)
+static void __submit_queue(struct intel_engine_cs *engine, int prio)
{
- if (prio > engine->execlists.queue_priority) {
engine->execlists.queue_priority = prio;
tasklet_hi_schedule(&engine->execlists.tasklet);
- }
+}
+
+static void submit_queue(struct intel_engine_cs *engine, int prio)
+{
+ if (prio > engine->execlists.queue_priority)
+ __submit_queue(engine, prio);
}
static void execlists_submit_request(struct i915_request *request)
@@ -1189,7 +1193,10 @@ static void execlists_schedule(struct i915_request
*request, int prio)
__list_del_entry(&pt->link);
queue_request(engine, pt, prio);
}
- submit_queue(engine, prio);
+
+ if (prio > engine->execlists.queue_priority &&
+ i915_sw_fence_done(&pt_to_request(pt)->submit))
+ __submit_queue(engine, prio);
}
spin_unlock_irq(&engine->timeline->lock);
--
2.16.3
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
