drm/vc4: Add a BO cache.

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We need to allocate new BOs in the kernel as part of each frame, but
the CMA allocator is way too slow for that.  As an optimization, keep
track of recently-freed BOs and reuse them, with a 1 second timeout to
fully free them back to the system.

This improves 3D performance by about 15%.

Signed-off-by: Eric Anholt <eric@anholt.net>

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This commit is contained in:

Eric Anholt 2015-10-09 20:25:07 -07:00

parent 10028c5ab1

commit c826a6e106

4 changed files with 384 additions and 8 deletions

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336

drivers/gpu/drm/vc4/vc4_bo.c

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1

drivers/gpu/drm/vc4/vc4_debugfs.c

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6

drivers/gpu/drm/vc4/vc4_drv.c

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49

drivers/gpu/drm/vc4/vc4_drv.h

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