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

[Nicolai Hähnle]

On 20.06.2016 11:59, ⚛ 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
>
> [Major issue] R7 370 yields 133 FPS in Tesseract, while R9 285
> unexpectedly yields 111.81 FPS in Tesseract

It would be most helpful if people with the affected hardware could 
first identify the responsible component and then bisect.

Cheers,
Nicolai

> 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.)
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