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drm/i915: Bump GT idling delay to 2 jiffies

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In monitoring a transcode pipeline that is latency sensitive (it waits
between submitting frames, and each frame requires work on rcs/vcs/vecs
engines), it is found that it took longer than a single jiffy for it to
sustain its workload. Allowing an extra jiffy headroom for the userspace
prevents us from prematurely parking and having to exit powersaving
immediately.

Link: https://gitlab.freedesktop.org/drm/intel/-/issues/6284
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Karolina Drobnik <karolina.drobnik@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/e37911ec087a9ce50630d6faf61fa2c0d5f96d44.1657289332.git.karolina.drobnik@intel.com
This commit is contained in:
Chris Wilson 2022-07-08 16:20:12 +02:00 • committed by Rodrigo Vivi
parent 394e2b57a9
commit 1ea7fe77c0
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/i915_active.c
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@ -974,7 +974,7 @@ void i915_active_acquire_barrier(struct i915_active *ref)
GEM_BUG_ON(!intel_engine_pm_is_awake(engine));
llist_add(barrier_to_ll(node), &engine->barrier_tasks);
intel_engine_pm_put_delay(engine, 1);
intel_engine_pm_put_delay(engine, 2);
}
}