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When flushing objects larger than the CPU cache it is preferrable to use a single wbinvd() rather than overlapping clflush(). At runtime, we avoid wbinvd() due to its system-wide latencies, but during singlethreaded suspend, no one will observe the imposed latency and we can opt for the faster wbinvd to clear all objects in a single hit. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210119214336.1463-1-chris@chris-wilson.co.uk |
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