drm/i915: Eliminate drm_gem_object_lookup during relocation

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As we provide a list of all objects that will be accessed from the
batchbuffer, we can build a lut of the handles associated with those
objects for this invocation and use that to avoid the overhead of
looking up those objects again for every relocation.

The cost of building and searching a small hash table is much less than
that of acquiring a spinlock, searching a radix tree and manipulating an
atomic refcnt per relocation.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

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Chris Wilson 2010-12-08 10:38:14 +00:00

parent ff7ea4c040

commit 67731b87e9

2 changed files with 129 additions and 27 deletions

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6

drivers/gpu/drm/i915/i915_drv.h

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150

drivers/gpu/drm/i915/i915_gem_execbuffer.c

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