On Mon, 2014-02-24 at 16:20 +0100, Marek Ol??k wrote: > > 2) Add support for uncached GTT. I think it should improve performance > for dGPUs under memory pressure, but some testing needs to be done to > confirm that. Uncached GTT doesn't seem to work for me on Evergreen, > but it's said to be working on some later chips.
FWIW, I think the issue is more likely with the code or your system than with the GPU: fglrx has always been using unsnooped GPU mappings with write-combined CPU mappings with PCIe as well. I'm not sure how they choose that vs. snooped and cacheable mappings though. -- Earthling Michel D?nzer | http://www.amd.com Libre software enthusiast | Mesa and X developer
