On 21.04.2016 02:42, Marek Olšák wrote: > On Thu, Apr 14, 2016 at 9:29 AM, Michel Dänzer <mic...@daenzer.net> wrote: >> On 14.04.2016 11:37, Michel Dänzer wrote: >>> On 12.04.2016 21:33, Marek =?UNKNOWN?B?T2zFocOhaw==?= wrote: >>>> >>>> URL: >>>> http://cgit.freedesktop.org/mesa/mesa/commit/?id=5a4b74d1ba2c156766a7a5dbfef099c7db5d6694 >>>> Author: Marek Olšák <marek.ol...@amd.com> >>>> Date: Mon Apr 11 19:56:07 2016 +0200 >>>> >>>> gallium/radeon: relax requirements on VRAM placements on APUs >>> >>> This change caused a bunch of ARB_shader_load_image_store piglit tests >>> to fail on my Kaveri, see some examples below. The incorrect values >>> seem consistent. >>> >>> I suppose some buffers end up in GTT instead of VRAM with this >>> change, but I'm not sure how that could cause problems. Any ideas? >> >> Also, with the code modified to use GTT only for everything but >> (potential) scanout buffers, the performance of Unigine Valley and the >> Unreal Engine 4 Elemental demo is reduced by about 30%. So the premise >> that GTT is about as fast as VRAM doesn't seem to hold true in practice >> (at least with Kaveri and presumably other (pre-)CIK APUs; maybe it's >> better with Carrizo and newer), which means that this change may cause >> performance of long-running processes to drop significantly over time. >> >> Given all these issues, I'm afraid it may be better to revert this >> change for now, until we have a better plan for dealing with this. > > Assuming you use the radeon kernel driver and you are not busy, would > you please check whether the performance is lower on amdgpu as well?
I am using the radeon driver, but also quite busy. Nicolai, can you try it on your Carrizo? -- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Mesa and X developer _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
