On Friday, 5 July 2019, Marek Olšák wrote: > On Fri, Jul 5, 2019 at 5:27 AM Timur Kristóf <timur.kristof@xxxxxxxxx> > wrote: > > > On Wed, 2019-07-03 at 14:44 -0400, Marek Olšák wrote: > > > You can run: > > > AMD_DEBUG=testdmaperf glxgears > > > > > > It tests transfer sizes of up to 128 MB, and it tests ~60 slightly > > > different methods of transfering data. > > > > > > Marek > > > > > > Thanks Marek, I didn't know about that option. > > Tried it, here is the output: https://pastebin.com/raw/9SAAbbAA > > > > I'm not quite sure how to interpret the numbers, they are inconsistent > > with the results from both pcie_bw and amdgpu.benchmark, for example > > GTT->VRAM at a 128 KB is around 1400 MB/s (I assume that is megabytes / > > sec, right?). > > > > Based on the SDMA results, you have 2.4 GB/s. For 128KB, it's 2.2 GB/s for > GTT->VRAM copies. > > Marek That's interesting, AFAIU that would be 17.6 Gbit/sec. But how can that be so much faster than the 5 Gbit/sec result from amdgpu.benchmark? _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
