Comment # 1
on bug 100067
from Mig
The same problem occurs when running the mat-mul example taken from https://cgit.freedesktop.org/~tstellar/opencl-example [mig@antergos-mig opencl-example]$ ./mat-mul There are 1 platforms. There are 1 GPU devices. clCreateProgramWithSource() suceeded. Speicherzugriffsfehler (Speicherabzug geschrieben) When int is replaced with unsigned int the the program runs fine: [mig@antergos-mig opencl-example]$ ./mat-mul There are 1 platforms. There are 1 GPU devices. clCreateProgramWithSource() suceeded. clBuildProgram() suceeded. clCreateKernel() suceeded. clSetKernelArg() succeeded. clSetKernelArg() succeeded. clSetKernelArg() succeeded. clSetKernelArg() succeeded. clSetKernelArg() succeeded. clSetKernelArg() succeeded. clSetKernelArg() succeeded. 50 94 178 60 120 220 Maybe it is related to the fact that the platform reports as 64bit adressspace: (clinfo reports incorrectly the "Global memory size" beeing 7GB whereas it shpuld report 2GB) [mig@antergos-mig ~]$ clinfo Number of platforms 1 Platform Name Clover Platform Vendor Mesa Platform Version OpenCL 1.1 Mesa 17.0.1 Platform Profile FULL_PROFILE Platform Extensions cl_khr_icd Platform Extensions function suffix MESA Platform Name Clover Number of devices 1 Device Name AMD TONGA (DRM 3.8.0 / 4.9.11-1-ARCH, LLVM 3.9.1) Device Vendor AMD Device Vendor ID 0x1002 Device Version OpenCL 1.1 Mesa 17.0.1 Driver Version 17.0.1 Device OpenCL C Version OpenCL C 1.1 Device Type GPU Device Profile FULL_PROFILE Max compute units 28 Max clock frequency 990MHz 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 Correctly-rounded divide and sqrt operations No Address bits 64, Little-Endian Global memory size 7606060644 (7.084GiB) Error Correction support No Max memory allocation 1901515161 (1.771GiB) 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 None Image support No Local memory type Local Local memory size 32768 (32KiB) Max constant buffer size 1901515161 (1.771GiB) Max number of constant args 16 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 Available Yes Compiler Available Yes Device Extensions 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_byte_addressable_store cl_khr_fp64 NULL platform behavior clGetPlatformInfo(NULL, CL_PLATFORM_NAME, ...) Clover clGetDeviceIDs(NULL, CL_DEVICE_TYPE_ALL, ...) Success [MESA] clCreateContext(NULL, ...) [default] Success [MESA] 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 TONGA (DRM 3.8.0 / 4.9.11-1-ARCH, LLVM 3.9.1) 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 TONGA (DRM 3.8.0 / 4.9.11-1-ARCH, LLVM 3.9.1) ICD loader properties ICD loader Name OpenCL ICD Loader ICD loader Vendor OCL Icd free software ICD loader Version 2.2.10 ICD loader Profile OpenCL 2.1
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