Bug 759556 – dev-libs/rocm-device-libs performance issues on gfx803: possible revert to 3.5 possible?

• Status: RESOLVED OBSOLETE
• Product: Gentoo Linux

[Description Janpieter Sollie 2020-12-12 05:40:02 UTC]

Github rocm points about a number of performance issues on gfx803 hardware.  This issue seems to be present since 3.7.0, but never resolved.
I made a few benchmarks of opencl performance on rocm - clover, rocm is > 10x slower compared to clover.
Could you please insert rocm 3.5.0 ebuilds again? I know there's still on rocm github, I even created ebuilds for them myself.

Reproducible: Always

Steps to Reproduce:
1.compile rocm
2.run benchmark
3.uninstall rocm
4.compile clover
5.run benchmark
Actual Results:  
rocm performance is 10x slower compared to clover, and the execution crashes frequently

Expected Results:  
same performance, both should be running fine

[Comment 1 Janpieter Sollie 2020-12-12 06:07:19 UTC]

Created attachment 678055 [details]
C code for opencl benchmark test

[Comment 2 Janpieter Sollie 2020-12-12 06:08:36 UTC]

Created attachment 678058 [details]
opencl code for benchmark

[Comment 3 Janpieter Sollie 2020-12-12 06:10:13 UTC]

Created attachment 678061 [details]
emerge --info

[Comment 4 Jonas Stein 2020-12-13 11:43:30 UTC]

please write cat/pkg always in the summary

[Comment 5 Janpieter Sollie 2020-12-14 07:11:08 UTC]

(In reply to Jonas Stein from comment #4)
> please write cat/pkg always in the summary

I'm sorry, I wasn't sure about which package we are talking about: rocm consists of several packages, so not sure which one of them caused the regression.

[Comment 6 Janpieter Sollie 2021-02-18 07:31:51 UTC]

GFX803 is no longer supported by ROCm, so it will fade away quickly.  Guess it's better to run on amd proporietary unless clover makes a comeback