Linux OpenCL backend doesn't work; "Illegal instruction detected: VOP* instruction violates constant bus restriction" #83608

New Issue

Josh Marshall · 2020-12-10T00:00:02+01:00

Josh Marshall commented

2020-12-10 00:00:02 +01:00

System Information
Operating system: Linux-5.8.0-31-generic-x86_64-with-glibc2.29 64 Bits
Graphics card: Radeon RX Vega (VEGA10, DRM 3.38.0, 5.8.0-31-generic, LLVM 11.0.0) X.Org 4.6 (Core Profile) Mesa 20.2.1

Blender Version
Broken: version: 2.83.5, branch: Unknown, commit date: Unknown Unknown, hash: rBUnknown
Worked: (newest version of Blender that worked as expected)

Short description of error
OpenCGL backend does not work.

anadon@goodadvicemallard:~$ blender
Read prefs: /home/anadon/.config/blender/2.83/config/userpref.blend
LLVM triggered Diagnostic Handler: Illegal instruction detected: VOP* instruction violates constant bus restriction
renamable $vgpr4 = V_CNDMASK_B32_e32 32768, killed $vgpr4, implicit killed $vcc, implicit $exec
LLVM failed to compile shader
radeonsi: can't compile a main shader part

anadon@goodadvicemallard:~$ clinfo
Number of platforms                               3
  Platform Name                                   Portable Computing Language
  Platform Vendor                                 The pocl project
  Platform Version                                OpenCL 1.2 pocl 1.5, None+Asserts, LLVM 9.0.1, RELOC, SLEEF, DISTRO, POCL_DEBUG
  Platform Profile                                FULL_PROFILE
  Platform Extensions                             cl_khr_icd
  Platform Extensions function suffix             POCL

  Platform Name                                   Clover
  Platform Vendor                                 Mesa
  Platform Version                                OpenCL 1.1 Mesa 20.2.1
  Platform Profile                                FULL_PROFILE
  Platform Extensions                             cl_khr_icd
  Platform Extensions function suffix             MESA

  Platform Name                                   AMD Accelerated Parallel Processing
  Platform Vendor                                 Advanced Micro Devices, Inc.
  Platform Version                                OpenCL 2.0 AMD-APP (3188.4)
  Platform Profile                                FULL_PROFILE
  Platform Extensions                             cl_khr_icd cl_amd_event_callback 
  Platform Extensions function suffix             AMD

  Platform Name                                   Portable Computing Language
Number of devices                                 1
  Device Name                                     pthread-Intel(R) Core(TM) i7-6800K CPU @ 3.40GHz
  Device Vendor                                   GenuineIntel
  Device Vendor ID                                0x6c636f70
  Device Version                                  OpenCL 1.2 pocl HSTR: pthread-x86_64-pc-linux-gnu-broadwell
  Driver Version                                  1.5
  Device OpenCL C Version                         OpenCL C 1.2 pocl
  Device Type                                     CPU
  Device Profile                                  FULL_PROFILE
  Device Available                                Yes
  Compiler Available                              Yes
  Linker Available                                Yes
  Max compute units                               12
  Max clock frequency                             3800MHz
  Device Partition                                (core)
    Max number of sub-devices                     12
    Supported partition types                     equally, by counts
    Supported affinity domains                    (n/a)
  Max work item dimensions                        3
  Max work item sizes                             4096x4096x4096
  Max work group size                             4096
  Preferred work group size multiple              8
  Preferred / native vector sizes                 
    char                                                16 / 16      
    short                                               16 / 16      
    int                                                  8 / 8       
    long                                                 4 / 4       
    half                                                 0 / 0        (n/a)
    float                                                8 / 8       
    double                                               4 / 4        (cl_khr_fp64)
  Half-precision Floating-point support           (n/a)
  Single-precision Floating-point support         (core)
    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
    Correctly-rounded divide and sqrt operations  Yes
  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                              65211195392 (60.73GiB)
  Error Correction support                        No
  Max memory allocation                           17179869184 (16GiB)
  Unified memory for Host and Device              Yes
  Minimum alignment for any data type             128 bytes
  Alignment of base address                       1024 bits (128 bytes)
  Global Memory cache type                        Read/Write
  Global Memory cache size                        15728640 (15MiB)
  Global Memory cache line size                   64 bytes
  Image support                                   Yes
    Max number of samplers per kernel             16
    Max size for 1D images from buffer            1073741824 pixels
    Max 1D or 2D image array size                 2048 images
    Max 2D image size                             32768x32768 pixels
    Max 3D image size                             2048x2048x2048 pixels
    Max number of read image args                 128
    Max number of write image args                128
  Local memory type                               Global
  Local memory size                               8388608 (8MiB)
  Max number of constant args                     8
  Max constant buffer size                        8388608 (8MiB)
  Max size of kernel argument                     1024
  Queue properties                                
    Out-of-order execution                        Yes
    Profiling                                     Yes
  Prefer user sync for interop                    Yes
  Profiling timer resolution                      1ns
  Execution capabilities                          
    Run OpenCL kernels                            Yes
    Run native kernels                            Yes
  printf() buffer size                            16777216 (16MiB)
  Built-in kernels                                (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_3d_image_writes cl_khr_fp64 cl_khr_int64_base_atomics cl_khr_int64_extended_atomics cl_khr_fp64

  Platform Name                                   Clover
Number of devices                                 1
  Device Name                                     Radeon RX Vega (VEGA10, DRM 3.38.0, 5.8.0-31-generic, LLVM 11.0.0)
  Device Vendor                                   AMD
  Device Vendor ID                                0x1002
  Device Version                                  OpenCL 1.1 Mesa 20.2.1
  Driver Version                                  20.2.1
  Device OpenCL C Version                         OpenCL C 1.1 
  Device Type                                     GPU
  Device Profile                                  FULL_PROFILE
  Device Available                                Yes
  Compiler Available                              Yes
  Max compute units                               64
  Max clock frequency                             1630MHz
  Max work item dimensions                        3
  Max work item sizes                             256x256x256
  Max work group size                             256
  Preferred work group size multiple              64
  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                              8589934592 (8GiB)
  Error Correction support                        No
  Max memory allocation                           6871947673 (6.4GiB)
  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                               32768 (32KiB)
  Max number of constant args                     16
  Max constant buffer size                        2147483392 (2GiB)
  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
  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


  Platform Name                                   AMD Accelerated Parallel Processing
Number of devices                                 0

NULL platform behavior
  clGetPlatformInfo(NULL, CL_PLATFORM_NAME, ...)  No platform
  clGetDeviceIDs(NULL, CL_DEVICE_TYPE_ALL, ...)   No platform
  clCreateContext(NULL, ...) [default]            No platform
  clCreateContext(NULL, ...) [other]              Success [POCL]
  clCreateContextFromType(NULL, CL_DEVICE_TYPE_DEFAULT)  Success (1)
    Platform Name                                 Portable Computing Language
    Device Name                                   pthread-Intel(R) Core(TM) i7-6800K CPU @ 3.40GHz
  clCreateContextFromType(NULL, CL_DEVICE_TYPE_CPU)  Success (1)
    Platform Name                                 Portable Computing Language
    Device Name                                   pthread-Intel(R) Core(TM) i7-6800K CPU @ 3.40GHz
  clCreateContextFromType(NULL, CL_DEVICE_TYPE_GPU)  No devices found in platform
  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                                 Portable Computing Language
    Device Name                                   pthread-Intel(R) Core(TM) i7-6800K CPU @ 3.40GHz

Exact steps for others to reproduce the error
Always happens, at start up.

**System Information** Operating system: Linux-5.8.0-31-generic-x86_64-with-glibc2.29 64 Bits Graphics card: Radeon RX Vega (VEGA10, DRM 3.38.0, 5.8.0-31-generic, LLVM 11.0.0) X.Org 4.6 (Core Profile) Mesa 20.2.1 **Blender Version** Broken: version: 2.83.5, branch: Unknown, commit date: Unknown Unknown, hash: `rBUnknown` Worked: (newest version of Blender that worked as expected) **Short description of error** Open~~C~~GL backend does not work. ``` anadon@goodadvicemallard:~$ blender Read prefs: /home/anadon/.config/blender/2.83/config/userpref.blend LLVM triggered Diagnostic Handler: Illegal instruction detected: VOP* instruction violates constant bus restriction renamable $vgpr4 = V_CNDMASK_B32_e32 32768, killed $vgpr4, implicit killed $vcc, implicit $exec LLVM failed to compile shader radeonsi: can't compile a main shader part ``` ``` anadon@goodadvicemallard:~$ clinfo Number of platforms 3 Platform Name Portable Computing Language Platform Vendor The pocl project Platform Version OpenCL 1.2 pocl 1.5, None+Asserts, LLVM 9.0.1, RELOC, SLEEF, DISTRO, POCL_DEBUG Platform Profile FULL_PROFILE Platform Extensions cl_khr_icd Platform Extensions function suffix POCL Platform Name Clover Platform Vendor Mesa Platform Version OpenCL 1.1 Mesa 20.2.1 Platform Profile FULL_PROFILE Platform Extensions cl_khr_icd Platform Extensions function suffix MESA Platform Name AMD Accelerated Parallel Processing Platform Vendor Advanced Micro Devices, Inc. Platform Version OpenCL 2.0 AMD-APP (3188.4) Platform Profile FULL_PROFILE Platform Extensions cl_khr_icd cl_amd_event_callback Platform Extensions function suffix AMD Platform Name Portable Computing Language Number of devices 1 Device Name pthread-Intel(R) Core(TM) i7-6800K CPU @ 3.40GHz Device Vendor GenuineIntel Device Vendor ID 0x6c636f70 Device Version OpenCL 1.2 pocl HSTR: pthread-x86_64-pc-linux-gnu-broadwell Driver Version 1.5 Device OpenCL C Version OpenCL C 1.2 pocl Device Type CPU Device Profile FULL_PROFILE Device Available Yes Compiler Available Yes Linker Available Yes Max compute units 12 Max clock frequency 3800MHz Device Partition (core) Max number of sub-devices 12 Supported partition types equally, by counts Supported affinity domains (n/a) Max work item dimensions 3 Max work item sizes 4096x4096x4096 Max work group size 4096 Preferred work group size multiple 8 Preferred / native vector sizes char 16 / 16 short 16 / 16 int 8 / 8 long 4 / 4 half 0 / 0 (n/a) float 8 / 8 double 4 / 4 (cl_khr_fp64) Half-precision Floating-point support (n/a) Single-precision Floating-point support (core) 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 Correctly-rounded divide and sqrt operations Yes 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 65211195392 (60.73GiB) Error Correction support No Max memory allocation 17179869184 (16GiB) Unified memory for Host and Device Yes Minimum alignment for any data type 128 bytes Alignment of base address 1024 bits (128 bytes) Global Memory cache type Read/Write Global Memory cache size 15728640 (15MiB) Global Memory cache line size 64 bytes Image support Yes Max number of samplers per kernel 16 Max size for 1D images from buffer 1073741824 pixels Max 1D or 2D image array size 2048 images Max 2D image size 32768x32768 pixels Max 3D image size 2048x2048x2048 pixels Max number of read image args 128 Max number of write image args 128 Local memory type Global Local memory size 8388608 (8MiB) Max number of constant args 8 Max constant buffer size 8388608 (8MiB) Max size of kernel argument 1024 Queue properties Out-of-order execution Yes Profiling Yes Prefer user sync for interop Yes Profiling timer resolution 1ns Execution capabilities Run OpenCL kernels Yes Run native kernels Yes printf() buffer size 16777216 (16MiB) Built-in kernels (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_3d_image_writes cl_khr_fp64 cl_khr_int64_base_atomics cl_khr_int64_extended_atomics cl_khr_fp64 Platform Name Clover Number of devices 1 Device Name Radeon RX Vega (VEGA10, DRM 3.38.0, 5.8.0-31-generic, LLVM 11.0.0) Device Vendor AMD Device Vendor ID 0x1002 Device Version OpenCL 1.1 Mesa 20.2.1 Driver Version 20.2.1 Device OpenCL C Version OpenCL C 1.1 Device Type GPU Device Profile FULL_PROFILE Device Available Yes Compiler Available Yes Max compute units 64 Max clock frequency 1630MHz Max work item dimensions 3 Max work item sizes 256x256x256 Max work group size 256 Preferred work group size multiple 64 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 8589934592 (8GiB) Error Correction support No Max memory allocation 6871947673 (6.4GiB) 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 32768 (32KiB) Max number of constant args 16 Max constant buffer size 2147483392 (2GiB) 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 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 Platform Name AMD Accelerated Parallel Processing Number of devices 0 NULL platform behavior clGetPlatformInfo(NULL, CL_PLATFORM_NAME, ...) No platform clGetDeviceIDs(NULL, CL_DEVICE_TYPE_ALL, ...) No platform clCreateContext(NULL, ...) [default] No platform clCreateContext(NULL, ...) [other] Success [POCL] clCreateContextFromType(NULL, CL_DEVICE_TYPE_DEFAULT) Success (1) Platform Name Portable Computing Language Device Name pthread-Intel(R) Core(TM) i7-6800K CPU @ 3.40GHz clCreateContextFromType(NULL, CL_DEVICE_TYPE_CPU) Success (1) Platform Name Portable Computing Language Device Name pthread-Intel(R) Core(TM) i7-6800K CPU @ 3.40GHz clCreateContextFromType(NULL, CL_DEVICE_TYPE_GPU) No devices found in platform 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 Portable Computing Language Device Name pthread-Intel(R) Core(TM) i7-6800K CPU @ 3.40GHz ``` **Exact steps for others to reproduce the error** Always happens, at start up.

Josh Marshall commented

2020-12-10 00:00:02 +01:00

Added subscriber: @Anadon

Robert Guetzkow commented

2020-12-10 11:46:24 +01:00

Added subscriber: @rjg

Robert Guetzkow commented

2020-12-10 11:46:24 +01:00

For reference, the following issues also contain the LLVM error message: #83488, #82461, #83587 (but might not be directly related).

Brecht Van Lommel commented

2021-01-26 14:57:30 +01:00

Added subscriber: @brecht

Brecht Van Lommel commented

2021-01-26 14:57:30 +01:00

This error is coming from the OpenGL graphics driver, not OpenCL.

Cycles OpenCL rendering requires the Pro drivers and does not use Mesa.
https://docs.blender.org/manual/en/dev/render/cycles/gpu_rendering.html#amd

This error is coming from the OpenGL graphics driver, not OpenCL. Cycles OpenCL rendering requires the Pro drivers and does not use Mesa. https://docs.blender.org/manual/en/dev/render/cycles/gpu_rendering.html#amd

Aaron Carlisle commented

2021-09-28 04:23:29 +02:00

Added subscriber: @Blendify

Aaron Carlisle commented

2021-09-28 04:23:29 +02:00

Changed status from 'Needs Triage' to: 'Archived'

Aaron Carlisle closed this issue

2021-09-28 04:23:29 +02:00

Aaron Carlisle commented

2021-09-28 04:23:29 +02:00

No activity for more than a week. As per the tracker policy we assume the issue is gone and can be closed.

Thanks again for the report. If the problem persists please open a new report with the required information.

No activity for more than a week. As per the tracker policy we assume the issue is gone and can be closed. Thanks again for the report. If the problem persists please open a new report with the required information.

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Linux OpenCL backend doesn't work; "Illegal instruction detected: VOP* instruction violates constant bus restriction" #83608