On Thu, Jun 11, 2015 at 09:02:44AM +0100, Dave Gordon wrote: > On 10/06/15 16:52, Chris Wilson wrote: > > I seem to recall that we tried clflushing for gen6+, but we didn't > > record any details, so it may be worth retesting ivb with that w/a. > > Is that clflush on the CPU, or MI_CLFLUSH on the GPU? Does the latter > help at all?
Only CPU. The w/a is required for all rings, and the MI_CFLUSH is RCS only. Anyway so far using clflush for gen6/ivb/hsw I haven't yet triggered the failures, but there is a measurably improvement over the I915_READ(). -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
