Quoting Chris Wilson (2018-04-12 14:57:42) > Quoting Mika Kuoppala (2018-04-12 14:52:37) > > Read ordering on cpu can be out of order and speculative. > > If it didn't include a barrier to prevent compiler mispeculation. rmb() > only applies to other CPU cores and not the GPU so this is entirely > hocus. To put it another way this is just imposing the cost of an uncached mmio which the entire point of using HWSP in the first place is to avoid. -Chris _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
