On Wed, Jan 20, 2016 at 6:30 PM, Nicolai Hähnle <nhaeh...@gmail.com> wrote: > On 19.01.2016 20:20, Marek Olšák wrote: >> >> From: Marek Olšák <marek.ol...@amd.com> >> >> We don't use on-chip GS, so it's not required to reserve CU1 for ES. > > > Why is a deadlock not possible with an off-chip GS ring?
It's about LDS. On-chip GS uses LDS instead of the rings, which can cause a PS deadlock just like LS. We could allow all shaders to run on all CUs if the kernel programmed SPI_RESOURCE_RESERVE*_CU0 and *_CU1 slightly differently. Those registers allow reserving a half of LDS for certain stages. For example, reserving it for PS would mean that PS could use all of CU0 LDS, but LS could only use a half. This is best for chips with only a few CUs. Marek _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
