drm/i915: Micro-optimise gen6_ppgtt_insert_entries()

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Inline the address computation to avoid the vfunc call for every page.
We still have to pay the high overhead of sg_page_iter_next(), but now
at least GCC can optimise the inner most loop, giving a significant
boost to some thrashing Unreal Engine workloads.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170215084357.19977-2-chris@chris-wilson.co.uk

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Chris Wilson 2017-02-15 08:43:36 +00:00

parent ba7a5741b9

commit b31144c0da

1 changed files with 33 additions and 35 deletions

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drivers/gpu/drm/i915/i915_gem_gtt.c

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