drm/i915/execlists: Switch to rb_root_cached

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The kernel recently gained an augmented rbtree with the purpose of
cacheing the leftmost element of the rbtree, a frequent optimisation to
avoid calls to rb_first() which is also employed by the
execlists->queue. Switch from our open-coded cache to the library.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180629075348.27358-9-chris@chris-wilson.co.uk

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This commit is contained in:

Chris Wilson 2018-06-29 08:53:20 +01:00

parent cb4dc8daf4

commit 655250a8d1

4 changed files with 19 additions and 39 deletions

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7

drivers/gpu/drm/i915/intel_engine_cs.c

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12

drivers/gpu/drm/i915/intel_guc_submission.c

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32

drivers/gpu/drm/i915/intel_lrc.c

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7

drivers/gpu/drm/i915/intel_ringbuffer.h

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