[Mesa-dev] Let's identify the R9 285 bottleneck in respect to R7 370

[Aaron Watry]

On Mon, Jun 20, 2016 at 4:59 AM, ⚛ <0xe2.0x9a.0x9b at gmail.com> wrote:

> Hello.
>
> The result file at
> http://openbenchmarking.org/result/1606180-PTS-MIDJUNEA78 is showing
> multiple issues, some of them are:
>
> [Minor issue] Kernel 4.7.0-999-generic (x86_64) 20160616 has a
> performance regression on R9 290
>

According to Phoronix, the issue with Michael's 290 is that DPM is stuck at
a low-clock state[1].

I'm not sure if there's other issues at play (card model, bios, etc), but
that would at least explain the large drop in performance for that card.

[1] -
http://www.phoronix.com/scan.php?page=news_item&px=Linux-4.7-R9-290-Regression


>
> [Major issue] R7 370 yields 133 FPS in Tesseract, while R9 285
> unexpectedly yields 111.81 FPS in Tesseract
>
> R7 370: 1996.8 GFLOPS
> R9 285: 3290 GLOPS
>
> I would like this forum thread to identify the cause of the major
> issue. So the question is:
>
> *** What might be causing R9 285 to perform worse than R7 370? ***
>
> (I don't have access to R7 370 nor R9 285. My current answer to the
> question is: I don't know.)
> _______________________________________________
> mesa-dev mailing list
> mesa-dev at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/mesa-dev
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/mesa-dev/attachments/20160620/7f65cd04/attachment-0001.html>