Bug 101584

Summary: clover: ethminer -G --benchmark: ring buffer overflow, GPU faults
Product: Mesa Reporter: Christoph Haag <haagch>
Component: Drivers/Gallium/radeonsiAssignee: Default DRI bug account <dri-devel>
Status: RESOLVED MOVED QA Contact: Default DRI bug account <dri-devel>
Severity: normal    
Priority: medium    
Version: git   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: i915 features:
Bug Depends on:    
Bug Blocks: 99553    
Attachments: dmesg
without X

Description Christoph Haag 2017-06-25 09:21:19 UTC 
Created attachment 132229 [details]
dmesg

Tested with my RX 480 on mesa git and Linux 4.11 and 4.12-rc.

To reproduce, get https://github.com/ethereum-mining/ethminer
in libethash-cl/ethash_cl_miner_kernel.cl add
#pragma OPENCL EXTENSION cl_clang_storage_class_specifiers : enable
then cmake . and make and in ethminer/ run ./ethminer -G --benchmark

it outputs some progress and at 97% something goes wrong and I get GPU faults and/or GPU hangs.

Interestingly with the closed source OpenCL runtime from amdgpu-pro it fails at 97% too.
Comment 1 Christoph Haag 2017-06-28 01:36:51 UTC 
Created attachment 132290 [details]
without X

Thanks to a tip from tom stellard I tried it without X (after exiting sddm). 

I've tried to start the miner with "real work" from a pool as recommended:

GPU_FORCE_64BIT_PTR=0 GPU_MAX_HEAP_SIZE=100 GPU_USE_SYNC_OBJECTS=1 GPU_MAX_ALLOC_PERCENT=100 GPU_SINGLE_ALLOC_PERCENT=100 ./ethminer --farm-recheck 200 -G -S eu1.ethermine.org:4444 etc. etc.

I get gpu faults, but no hangs or other issues and the system is usable normally after exiting the miner.

The -G --benchmark mode still has worse troubles with hangs etc.
Comment 2 GitLab Migration User 2019-09-25 17:59:30 UTC 
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

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