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OpenCL: Not detected: clGetDeviceIDs() returned -1
Posted: Mon Apr 06, 2020 8:30 am
by MarcvdM
Hello,
I run FAHClient on a lenovo p53 ,NVidia T1000 mobile. Fedora 31 install. Nvidia driver 440.64 is installed (dkms).
The FAH client installer did not come with /var/lib/fahclient/GPUs.txt, so I installed that manually. The T1000 is in the list, and gets reported on in log.txt:
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08:06:02: CWD: /var/lib/fahclient
08:06:02: OS: Linux 5.5.13-200.fc31.x86_64 x86_64
08:06:02: OS Arch: AMD64
08:06:02: GPUs: 1
08:06:02: GPU 0: Bus:1 Slot:0 Func:0 NVIDIA:7 TU117GLM [Quadro T1000 Mobile]
08:06:02:CUDA Device 0: Platform:0 Device:0 Bus:1 Slot:0 Compute:7.5 Driver:10.2
08:06:02: OpenCL: Not detected: clGetDeviceIDs() returned -1
08:06:02:***********************************************************************
I do not understand why method clGetDeviceIDs() returns "-1", where "clinfo" has no issues with it:
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NULL platform behavior
clGetPlatformInfo(NULL, CL_PLATFORM_NAME, ...) NVIDIA CUDA
clGetDeviceIDs(NULL, CL_DEVICE_TYPE_ALL, ...) Success [NV]
clCreateContext(NULL, ...) [default] Success [NV]
in this forum I found an entry that opencl-utils-dev needs to be installed, so installed that. packages matching opencl:
opencl-filesystem-1.0-10.fc31.noarch
opencl-utils-1-10.svn16.fc31.x86_64
opencl-utils-devel-1-10.svn16.fc31.x86_64
opencl-headers-2.2-5.20190205git49f07d3.fc31.noarch
Any hint on how to enable the GPU for folding would be greatly appreciated
thanks,
Marc
Re: OpenCL: Not detected: clGetDeviceIDs() returned -1
Posted: Mon Apr 06, 2020 11:03 am
by MarcvdM
OK _ one step closer now. I decided to crudely hack /etc/OpenCL/vendors, and leave nvidia as only valid .icd file. lo and behold, FAHClient finally recognizes the GPU:
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0:58:27: CWD: /var/lib/fahclient
10:58:27: OS: Linux 5.5.13-200.fc31.x86_64 x86_64
10:58:27: OS Arch: AMD64
10:58:27: GPUs: 1
10:58:27: GPU 0: Bus:1 Slot:0 Func:0 NVIDIA:7 TU117GLM [Quadro T1000 Mobile]
10:58:27: CUDA Device 0: Platform:0 Device:0 Bus:1 Slot:0 Compute:7.5 Driver:10.2
10:58:27:OpenCL Device 0: Platform:0 Device:0 Bus:1 Slot:0 Compute:1.2 Driver:440.64
10:58:27:***********************************************************************
The only problem remaining is that the config.xml is not generated correctly:
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10:58:27: <!-- Folding Slot Configuration -->
10:58:27: <gpu v='false'/>
10:58:27:
10:58:27: <!-- Slot Control -->
10:58:27: <power v='medium'/>
10:58:27:
10:58:27:
10:58:27: <!-- Folding Slots -->
10:58:27: <slot id='0' type='CPU'>
10:58:27: <paused v='true'/>
10:58:27: </slot>
Re: OpenCL: Not detected: clGetDeviceIDs() returned -1
Posted: Mon Apr 06, 2020 11:22 am
by MarcvdM
Success, editing the config.xml in /etc did the trick
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[I] marc@marchost /v/l/fahclient> nvidia-smi
Mon Apr 6 13:18:49 2020
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 440.64 Driver Version: 440.64 CUDA Version: 10.2 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|===============================+======================+======================|
| 0 Quadro T1000 Off | 00000000:01:00.0 On | N/A |
| N/A 60C P0 34W / N/A | 420MiB / 3903MiB | 100% Default |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: GPU Memory |
| GPU PID Type Process name Usage |
|=============================================================================|
| 0 1586 G /usr/libexec/Xorg 129MiB |
| 0 3268 G ...uest-channel-token=10575655998430285561 44MiB |
| 0 3735 C ...org/v7/lin/64bit/Core_22.fah/FahCore_22 233MiB |
+-----------------------------------------------------------------------------+
No match for a medim power config running on 4 of the 6 Intel cores though, and screen redraw is really slow now
update - no, the single GPU (automatically assisted by one CPU core) results in about 10x more "points per day" as a CPU only run
Re: OpenCL: Not detected: clGetDeviceIDs() returned -1
Posted: Mon Apr 06, 2020 12:23 pm
by kostuek
So, just out of interest, you had multiple vendors active and FAH was confused, is that about correct?
Re: OpenCL: Not detected: clGetDeviceIDs() returned -1
Posted: Mon Apr 06, 2020 5:06 pm
by MarcvdM
yes that is correct: mesa.icd, pocl.icd and nvidia.icd. renamed the first two
the way clinfo works is it goes through the list of vendors. I have searched for a supported way to set a preferred or main OpenCL vendor, could not find any.