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
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