0 Replies Latest reply on Aug 11, 2018 10:14 AM by aletrev

    Missing OpenCL for GCN-1 cards under linux

    aletrev

      Hello,

      I've installed the latest kernel 4.17 and the latest driver amdgpu-pro-opencl-18.20.606296.

      But my GCN-1 card show no support for OpenCL:

       

      # clinfo

      Number of platforms                           0

       

      The sad things is that, if I switch to Mesa OpenCL implementation:

       

      # clinfo

      Number of platforms 1
        Platform Name Clover
        Platform Vendor Mesa
        Platform Version OpenCL 1.1 Mesa 17.3.9
        Platform Profile FULL_PROFILE
        Platform Extensions cl_khr_icd
        Platform Extensions function suffix MESA
        Platform Name Clover
      Number of devices 1
        Device Name AMD Radeon HD 7900 Series (TAHITI / DRM 3.25.0 / 4.17.12-gentoo.s2, LLVM 5.0 2)
        Device Vendor AMD
        Device Vendor ID 0x1002
        Device Version OpenCL 1.1 Mesa 17.3.9
        Driver Version 17.3.9
        Device OpenCL C Version OpenCL C 1.1
        Device Type GPU
        Device Profile FULL_PROFILE
        Device Available Yes
        Compiler Available Yes
        Max compute units 32
        Max clock frequency 925MHz
        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 8 / 8 (cl_khr_fp16)
        float 4 / 4
        double 2 / 2 (cl_khr_fp64)
        Half-precision Floating-point support (cl_khr_fp16)
        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
        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 3220066304 (2.999GiB)
        Error Correction support No
        Max memory allocation 2254046412 (2.099GiB)
        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 2147483647 (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_in
        64_extended_atomics cl_khr_fp64 cl_khr_fp16
      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 [MESA]
        clCreateContextFromType(NULL, CL_DEVICE_TYPE_DEFAULT) Success (1)
        Platform Name Clover
        Device Name AMD Radeon HD 7900 Series (TAHITI / DRM 3.25.0 / 4.17.12-gentoo.s2, LLVM 5.0 2)
        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 HD 7900 Series (TAHITI / DRM 3.25.0 / 4.17.12-gentoo.s2, LLVM 5.0 2)
        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 HD 7900 Series (TAHITI / DRM 3.25.0 / 4.17.12-gentoo.s2, LLVM 5.0 2)

       

       

      So, what I have to think? That Mesa developers are better than AMD developers at supporting OpenCL?

      It can be awkward, in front of good support for later cards like GCN-2 and above.

      If older cards will never be supported, it's better to say it. So people can search for alternative.

      I'm sorry for harsh words, but I'm waiting from long time for use my old card.

       

       

      TIA