drm/i915/gem: Limit the blitter sizes to ensure low preemption latency

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Currently we insert a arbitration point every 128MiB during a blitter
copy. At 8GiB/s, this is around 30ms. This is a little on the large side
if we need to inject a high priority work, so reduced it down to 8MiB or
roughly 1ms.

v2: Don't forget both fill/copy.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191028203012.14566-1-chris@chris-wilson.co.uk

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Chris Wilson 2019-10-28 20:30:12 +00:00

parent 19c17b763f

commit 953d57eba5

1 changed files with 2 additions and 2 deletions

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drivers/gpu/drm/i915/gem/i915_gem_object_blt.c

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