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Inconsistency with Barriers having workgroup sizes above 256 work items. #156

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CoreRasurae opened this issue Dec 16, 2019 · 2 comments
Open

Inconsistency with Barriers having workgroup sizes above 256 work items. #156

CoreRasurae opened this issue Dec 16, 2019 · 2 comments
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bug Fix something that is broken

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@CoreRasurae
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For some reason, on some systems, the Barriers are not working properly. Inconsistent results are returned for workgroup sizes of 1024, or 512 on some NVIDIA systems, and 8192 workgroup sizes on some CPU systems.
The failing unit test is BarrierSupportTest.
@CoreRasurae
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NVIDIA NVS 4200M and NVIDIA GTX 760 pass the BarrierSupportTest on an Ubuntu 18.04 LTS, with nvidia-390, but a NVIDIA RTX 2070 is failing on a Ubuntu 16.04 LTS with Cuda 10-2, also GTX 1060 is failing on Arch linux.

@freemo freemo added the bug Fix something that is broken label Jan 29, 2020
@CoreRasurae
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In fact I've tested NVIDIA GT 1030 on the same system and the issue above is originated by the driver version. If using NVIDIA GT 1030 with nvidia-390 drivers the tests pass. If using the same NVIDIA GT 1030 on the same system, but with nvidia-440 drivers, the above test fails.

freemo pushed a commit that referenced this issue Jan 5, 2021
@CoreRasurae
Feature: Add support for getKernelMaxWorkGroupSize(), getKernelCompil…
44082bd 
…eWorkGroupSize(), getKernelPreferredWorkGroupSizeMultiple(), getKernelMinimumPrivateMemSizeInUsePerWorkItem() and getKernelLocalMemSizeInUse() - Fixes refs #2, Fixes refs #156
freemo added a commit that referenced this issue Jan 5, 2021
@freemo
Merge branch 'master' into 'master'
f7c496a 
Add support for getKernelMaxWorkGroupSize(), getKernelCompileWorkGroupSize(), gettKernelPreferredWorkGroupSizeMultiple(), getKernelMinimumPrivateMemSizeInUsePerWorkItem() and getKernelLocalMemSizeInUse() - Fixes refs #2, Fixes refs #156

See merge request aparapi/aparapi!20
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@freemo @CoreRasurae