On 2014.12.31 10:02:30 +0800, Zhigang Gong wrote: > This could get more than 10x boost for some atomic stress workloads. >
But this will be filtered by cmd parser. From kernel log, commit f3fc4884ebe6ae649d3723be14b219230d3b7fd2 Author: Francisco Jerez <[email protected]> Date: Wed Oct 2 15:53:16 2013 -0700 drm/i915/hsw: Disable L3 caching of atomic memory operations. Otherwise using any atomic memory operation will lock up the GPU due to a Haswell hardware bug. Maybe this issue affects some HSW stepping, should just fix the kernel. -- Open Source Technology Center, Intel ltd. $gpg --keyserver wwwkeys.pgp.net --recv-keys 4D781827
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