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#1 2022-12-28 19:36:11

alucinor
Member
Registered: 2019-10-04
Posts: 12

OpenCL Platform Disappeared After Update

After updating my system with "pacman -Syu" my OpenCL platform(mesa) disappeared! This is critical for me as an OpenCL developer. clinfo now reports number of platforms as 0. I noticed the update upgraded opencl-mesa from 22.2.3-1 to 22.3.1-1. The mesa ICD stills exists where it should be (/etc/OpenCL/vendors/mesa.icd).

My video card that used to show up as a device in the mesa platform is an AMD Radeon RX 6800 XT.

Last edited by alucinor (2022-12-29 18:17:56)

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#2 2022-12-29 10:03:52

Lone_Wolf
Member
From: Netherlands, Europe
Registered: 2005-10-04
Posts: 11,868

Re: OpenCL Platform Disappeared After Update

opencl-mesa gained rusticl support with mesa 22.3 and that doesn't have support for radeonsi yet.
That should result in clinfo showing atleast clover AND rusticl platrform.

Neither of those has support* for rdna3 cards like yours so both should show 0 devices.

You are probably using something else to get opencl support .

Please post full outputs of

$ ls -l /etc/OpenCL/vendors/
$ pacman -Qs opencl
$ clinfo

* rusticl will gain support for cards using radeonsi in the near future

Last edited by Lone_Wolf (2022-12-29 10:21:25)


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#3 2022-12-29 10:42:11

V1del
Forum Moderator
Registered: 2012-10-16
Posts: 21,427

Re: OpenCL Platform Disappeared After Update

According to my googlers that card doesn't exist (yet) is this a typo on your part alucinor? I'm assuming 6800 XT is what is meant

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#4 2022-12-29 18:17:42

alucinor
Member
Registered: 2019-10-04
Posts: 12

Re: OpenCL Platform Disappeared After Update

V1del is correct I have an AMD Radeon RX 6800 XT, sorry for the confusion that caused.

requested output:

$ ls -l /etc/OpenCL/vendors/
total 8
-rw-r--r-- 1 root root 19 Dec 14 20:56 mesa.icd
-rw-r--r-- 1 root root 22 Dec 14 20:56 rusticl.icd
$ pacman -Qs opencl
local/clinfo 3.0.21.02.21-1
    Simple OpenCL application that enumerates all available platform and device properties
local/libclc 14.0.6-1
    Library requirements of the OpenCL C programming language
local/ocl-icd 2.3.1-1
    OpenCL ICD Bindings
local/opencl-headers 2:2022.05.18-1
    OpenCL (Open Computing Language) header files
local/opencl-mesa 22.3.1-1
    OpenCL support with clover and rusticl for mesa drivers
$ clinfo
Number of platforms                               0

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#5 2022-12-29 18:45:35

Lone_Wolf
Member
From: Netherlands, Europe
Registered: 2005-10-04
Posts: 11,868

Re: OpenCL Platform Disappeared After Update

Those look as expected, maybe you are bitten by https://bugs.archlinux.org/task/76845 .

Install spirv-tools and spirv-llvm-translator , then rerun clinfo .


Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.


(A works at time B)  && (time C > time B ) ≠  (A works at time C)

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#6 2022-12-30 18:14:13

alucinor
Member
Registered: 2019-10-04
Posts: 12

Re: OpenCL Platform Disappeared After Update

That solved my problem of no platforms Lone_Wolf much thanks!

It revealed another problem smile

I was able to compile OpenCL kernels on my device before this update too. However now it appears that fails. Below is the output of clinfo.

Number of platforms                               2
  Platform Name                                   Clover
  Platform Vendor                                 Mesa
  Platform Version                                OpenCL 1.1 Mesa 22.3.1
  Platform Profile                                FULL_PROFILE
  Platform Extensions                             cl_khr_icd
  Platform Extensions function suffix             MESA

  Platform Name                                   rusticl
  Platform Vendor                                 Mesa/X.org
  Platform Version                                OpenCL 3.0 
  Platform Profile                                FULL_PROFILE
  Platform Extensions                             cl_khr_icd
  Platform Extensions with Version                cl_khr_icd                                                       0x400000 (1.0.0)
  Platform Numeric Version                        0xc00000 (3.0.0)
  Platform Extensions function suffix             MESA
  Platform Host timer resolution                  0ns

  Platform Name                                   Clover
Number of devices                                 1
  Device Name                                     AMD Radeon RX 6800 XT (navi21, LLVM 14.0.6, DRM 3.49, 6.1.1-arch1-1)
  Device Vendor                                   AMD
  Device Vendor ID                                0x1002
  Device Version                                  OpenCL 1.1 Mesa 22.3.1
  Device Numeric Version                          0x401000 (1.1.0)
  Driver Version                                  22.3.1
  Device OpenCL C Version                         OpenCL C 1.1 
  Device Type                                     GPU
  Device Profile                                  FULL_PROFILE
  Device Available                                Yes
  Compiler Available                              Yes
  Max compute units                               72
  Max clock frequency                             2575MHz
  Max work item dimensions                        3
  Max work item sizes                             256x256x256
  Max work group size                             256
=== CL_PROGRAM_BUILD_LOG ===
fatal error: cannot open file '/usr/share/clc/gfx1030-amdgcn-mesa-mesa3d.bc': No such file or directory
  Preferred work group size multiple (kernel)     <getWGsizes:1504: create kernel : error -46>
  Preferred / native vector sizes                 
    char                                                16 / 16      
    short                                                8 / 8       
    int                                                  4 / 4       
    long                                                 2 / 2       
    half                                                 0 / 0        (n/a)
    float                                                4 / 4       
    double                                               2 / 2        (cl_khr_fp64)
  Half-precision Floating-point support           (n/a)
  Single-precision Floating-point support         (core)
    Denormals                                     No
    Infinity and NANs                             Yes
    Round to nearest                              Yes
    Round to zero                                 No
    Round to infinity                             No
    IEEE754-2008 fused multiply-add               No
    Support is emulated in software               No
    Correctly-rounded divide and sqrt operations  No
  Double-precision Floating-point support         (cl_khr_fp64)
    Denormals                                     Yes
    Infinity and NANs                             Yes
    Round to nearest                              Yes
    Round to zero                                 Yes
    Round to infinity                             Yes
    IEEE754-2008 fused multiply-add               Yes
    Support is emulated in software               No
  Address bits                                    64, Little-Endian
  Global memory size                              17179869184 (16GiB)
  Error Correction support                        No
  Max memory allocation                           4294967296 (4GiB)
  Unified memory for Host and Device              No
  Minimum alignment for any data type             128 bytes
  Alignment of base address                       32768 bits (4096 bytes)
  Global Memory cache type                        None
  Image support                                   No
  Local memory type                               Local
  Local memory size                               65536 (64KiB)
  Max number of constant args                     16
  Max constant buffer size                        67108864 (64MiB)
  Max size of kernel argument                     1024
  Queue properties                                
    Out-of-order execution                        No
    Profiling                                     Yes
  Profiling timer resolution                      0ns
  Execution capabilities                          
    Run OpenCL kernels                            Yes
    Run native kernels                            No
    ILs with version                              SPIR-V                                                           0x400000 (1.0.0)
  Built-in kernels with version                   (n/a)
  Device Extensions                               cl_khr_byte_addressable_store cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_int64_base_atomics cl_khr_int64_extended_atomics cl_khr_fp64 cl_khr_extended_versioning
  Device Extensions with Version                  cl_khr_byte_addressable_store                                    0x400000 (1.0.0)
                                                  cl_khr_global_int32_base_atomics                                 0x400000 (1.0.0)
                                                  cl_khr_global_int32_extended_atomics                             0x400000 (1.0.0)
                                                  cl_khr_local_int32_base_atomics                                  0x400000 (1.0.0)
                                                  cl_khr_local_int32_extended_atomics                              0x400000 (1.0.0)
                                                  cl_khr_int64_base_atomics                                        0x400000 (1.0.0)
                                                  cl_khr_int64_extended_atomics                                    0x400000 (1.0.0)
                                                  cl_khr_fp64                                                      0x400000 (1.0.0)
                                                  cl_khr_extended_versioning                                       0x400000 (1.0.0)

  Platform Name                                   rusticl
Number of devices                                 0

NULL platform behavior
  clGetPlatformInfo(NULL, CL_PLATFORM_NAME, ...)  Clover
  clGetDeviceIDs(NULL, CL_DEVICE_TYPE_ALL, ...)   Success [MESA]
  clCreateContext(NULL, ...) [default]            Success [MESA]
  clCreateContext(NULL, ...) [other]              
  clCreateContextFromType(NULL, CL_DEVICE_TYPE_DEFAULT)  Success (1)
    Platform Name                                 Clover
    Device Name                                   AMD Radeon RX 6800 XT (navi21, LLVM 14.0.6, DRM 3.49, 6.1.1-arch1-1)
  clCreateContextFromType(NULL, CL_DEVICE_TYPE_CPU)  No devices found in platform
  clCreateContextFromType(NULL, CL_DEVICE_TYPE_GPU)  Success (1)
    Platform Name                                 Clover
    Device Name                                   AMD Radeon RX 6800 XT (navi21, LLVM 14.0.6, DRM 3.49, 6.1.1-arch1-1)
  clCreateContextFromType(NULL, CL_DEVICE_TYPE_ACCELERATOR)  No devices found in platform
  clCreateContextFromType(NULL, CL_DEVICE_TYPE_CUSTOM)  No devices found in platform
  clCreateContextFromType(NULL, CL_DEVICE_TYPE_ALL)  Success (1)
    Platform Name                                 Clover
    Device Name                                   AMD Radeon RX 6800 XT (navi21, LLVM 14.0.6, DRM 3.49, 6.1.1-arch1-1)

ICD loader properties
  ICD loader Name                                 OpenCL ICD Loader
  ICD loader Vendor                               OCL Icd free software
  ICD loader Version                              2.3.1
  ICD loader Profile                              OpenCL 3.0

It appears it is missing a file for 1030 amd graphics?

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#7 2023-01-03 13:13:14

Lone_Wolf
Member
From: Netherlands, Europe
Registered: 2005-10-04
Posts: 11,868

Re: OpenCL Platform Disappeared After Update

libclc has limited support for newer cards, mesa might support it in the future[1] , but how well it will function is unknown .
As far as I know the 1030 hasn't been supported in libclc at all.

I was able to compile OpenCL kernels on my device before this update too.

what opencl platform / commands were you using to compile opencl kernels with mesa 22.2.3-1 ?



[1] https://gitlab.freedesktop.org/mesa/mesa/-/issues/4189


Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.


(A works at time B)  && (time C > time B ) ≠  (A works at time C)

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