OpenCL for AMD

[Jahus]

Hello

I am trying to fold with my AMD HD 6950 but I'm getting `Error initializing context: clGetDeviceIDs` and `BAD_WORK_UNIT` errors:

> Graphic card: Sapphir HD 6950
> Drivers: Legacy 16.2 (beta) (exact same error happens with 13.12 drivers I was using for cryptocurrency mining purpose)
> System: Windows 7 SP1 x86

Here's the log:

Code: Select all

    :WU00:FS01:0x21:*********************** Log Started 2017-05-07TZ ***********************
    :WU00:FS01:0x21:Project: 11429 (Run 1, Clone 235, Gen 58)
    :WU00:FS01:0x21:Unit: 0x000000468ca304f158af65f4dbedfd29
    :WU00:FS01:0x21:CPU: 0x00000000000000000000000000000000
    :WU00:FS01:0x21:Machine: 1
    :WU00:FS01:0x21:Reading tar file core.xml
    :WU00:FS01:0x21:Reading tar file system.xml
    :WU00:FS01:0x21:Reading tar file integrator.xml
    :WU00:FS01:0x21:Reading tar file state.xml
    :WU00:FS01:0x21:Digital signatures verified
    :WU00:FS01:0x21:Folding@home GPU Core21 Folding@home Core
    :WU00:FS01:0x21:Version 0.0.18
    :WU00:FS01:0x21:ERROR:exception: Error initializing context: clGetDeviceIDs (-1)
    :WU00:FS01:0x21:Saving result file logfile_01.txt
    :WU00:FS01:0x21:Saving result file log.txt
    :WARNING:WU00:FS01:FahCore returned: BAD_WORK_UNIT (114 = 0x72)
    :WU00:FS01:Sending unit results: id:00 state:SEND error:FAULTY project:11429 run:1 clone:235 gen:58 core:0x21 unit:0x000000468ca304f158af65f4dbedfd29
    :WU00:FS01:Uploading 2.33KiB to 140.163.4.241
    :WU00:FS01:Connecting to 140.163.4.241:8080
    :WU00:FS01:Upload complete
    :WU01:FS01:Connecting to 171.67.108.45:80
    :WU00:FS01:Server responded WORK_ACK (400)
    :WU00:FS01:Cleaning up
    :WU01:FS01:Assigned to work server 140.163.4.245
    :WU01:FS01:Requesting new work unit for slot 01: READY gpu:0:Cayman PRO [Radeon 6900 Series] from 140.163.4.245
    :WU01:FS01:Connecting to 140.163.4.245:8080
    :WU01:FS01:Downloading 14.50MiB
    :WU01:FS01:Download 3.88%
    :WU01:FS01:Download 6.47%
    :WU01:FS01:Download 9.05%
    :WU01:FS01:Download 11.64%

[Joe_H]

Welcome to the folding support forum.

Code: Select all

    :WU00:FS01:0x21:ERROR:exception: Error initializing context: clGetDeviceIDs (-1)

This error message usually indicates a missing component from the video driver install, the OpenCL support. This often happens with drivers supplied by either MS or other sources other than AMD in the case of cards from them, or nVidia for their GPU's. Did you get your drivers from AMD?

It is also possible that you need a more recent driver version. Someone who has a 6950 or similar GPU may be able to comment on that. The last version released for that series of cards is 15.7.

[Joe_H]

One additional note, the current GPU folding core - 21, has been reported to work better on AMD GCN based GPU's. I don't know if that applies to the error you are seeing, but the performance on the older Terascale architecture your 6950 is based on will not be as good.

[4n0n]

Hi Jahus,

`Error initializing context: clGetDeviceIDs` and `BAD_WORK_UNIT

Code: Select all

    :WU00:FS01:0x21:ERROR:exception: Error initializing context: clGetDeviceIDs (-1)

This error message usually indicates a missing component from the video driver install, the OpenCL support.

This error message might also be related to missing privileges of the user "fahclient".

See here viewtopic.php?f=81&t=33353 and try if this fixes your problem. I had the same and in my case this workaround did the trick.

[toTOW]

> Drivers: Legacy 16.2 (beta) (exact same error happens with 13.12 drivers I was using for cryptocurrency mining purpose)
> System: Windows 7 SP1 x86

32 bits is no longer supported by FAH, you need a 64 bits OS.

Also, Crimson Edition 16.2.1 Beta drivers doesn't have a functioning OpenCL driver, you'll have to stick with 15.7.1 WHQL.

[JimboPalmer]

https://www.techpowerup.com/gpu-specs/r ... -6950.c405

This is a 9.5 year old design. It does meet the Minimums for starting folding: OpenCL 1.2 and Double Precision Floating point math (FP64)

https://www.amd.com/en/support/graphics ... on-hd-6950