On Fri, Aug 14, 2015 at 03:38:55PM +0300, Imre Deak wrote: > This is a v2 of [1]. Since v1 the HW team confirmed that there is an > HW issue in A steppings with the GPU/CPU snoop logic, which explains why > we need this workaround.
I've been testing this extensively, and I do believe we can use clflush for all gen - it is a measurable improvement over using the heavyweight/locked read of ACTHD, and none of the coherency tests have thrown any warnings (over a period of a couple of months now). -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
