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drm/nouveau: fix __nouveau_fence_wait performance
authorMarcin Slusarz <marcin.slusarz@gmail.com>
Wed, 9 Mar 2011 13:22:19 +0000 (14:22 +0100)
committerBen Skeggs <bskeggs@redhat.com>
Mon, 14 Mar 2011 06:35:16 +0000 (16:35 +1000)
commitbd35fe5a7930bf83ed56422ea4e4b6471ee6f739
tree1ff63be39ccd22175d4fa61683865664181fef38tree | snapshot (tar.gz zip)
parent459ca7e5283914845d7139905ff58824d2b0cc85commit | diff
drm/nouveau: fix __nouveau_fence_wait performance

Commit 21e86c1c8a844bf978f8fc431a59c9f5a578812d ("drm/nouveau: remove
cpu_writers lock") turned on lazy waits. Unfortunately
__nouveau_fence_wait was not optimized for this case and on HZ=100
kernel wasted up to 10 ms per call.

Depending on application, it led to 10-30% FPS regression.

Fix it.

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Francisco Jerez <currojerez@riseup.net>
drivers/gpu/drm/nouveau/nouveau_fence.c diff | blob | blame | history