OpenCL ne détecte pas le GPU
J'ai installé AMD APP SDK et voici mon problème. Les exemples OpenCL ne détectent pas le GPU. HelloWorld donne moi ceci:
[thomas@Clemence:/opt/AMDAPP/samples/opencl/bin/x86_64]$ ./HelloWorld
No GPU device available.
Choose CPU as default device.
input string:
GdkknVnqkc
output string:
HelloWorld
Passed!
Et voici la sortie clinfo
[thomas@Clemence:~/Documents/radeontop]$ clinfo
Number of platforms: 1
Platform Profile: FULL_PROFILE
Platform Version: OpenCL 1.2 AMD-APP (1214.3)
Platform Name: AMD Accelerated Parallel Processing
Platform Vendor: Advanced Micro Devices, Inc.
Platform Extensions: cl_khr_icd cl_AMD_event_callback cl_AMD_offline_devices
Platform Name: AMD Accelerated Parallel Processing
Number of devices: 1
Device Type: CL_DEVICE_TYPE_CPU
Device ID: 4098
Board name:
Max compute units: 8
Max work items dimensions: 3
Max work items[0]: 1024
Max work items[1]: 1024
Max work items[2]: 1024
Max work group size: 1024
Preferred vector width char: 16
Preferred vector width short: 8
Preferred vector width int: 4
Preferred vector width long: 2
Preferred vector width float: 8
Preferred vector width double: 4
Native vector width char: 16
Native vector width short: 8
Native vector width int: 4
Native vector width long: 2
Native vector width float: 8
Native vector width double: 4
Max clock frequency: 3633Mhz
Address bits: 64
Max memory allocation: 4182872064
Image support: Yes
Max number of images read arguments: 128
Max number of images write arguments: 8
Max image 2D width: 8192
Max image 2D height: 8192
Max image 3D width: 2048
Max image 3D height: 2048
Max image 3D depth: 2048
Max samplers within kernel: 16
Max size of kernel argument: 4096
Alignment (bits) of base address: 1024
Minimum alignment (bytes) for any datatype: 128
Single precision floating point capability
Denorms: Yes
Quiet NaNs: Yes
Round to nearest even: Yes
Round to zero: Yes
Round to +ve and infinity: Yes
IEEE754-2008 fused multiply-add: Yes
Cache type: Read/Write
Cache line size: 64
Cache size: 32768
Global memory size: 16731488256
Constant buffer size: 65536
Max number of constant args: 8
Local memory type: Global
Local memory size: 32768
Kernel Preferred work group size multiple: 1
Error correction support: 0
Unified memory for Host and Device: 1
Profiling timer resolution: 1
Device endianess: Little
Available: Yes
Compiler available: Yes
Execution capabilities:
Execute OpenCL kernels: Yes
Execute native function: Yes
Queue properties:
Out-of-Order: No
Profiling : Yes
Platform ID: 0x00007f4ef63f0fc0
Name: Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz
Vendor: GenuineIntel
Device OpenCL C version: OpenCL C 1.2
Driver version: 1214.3 (sse2,avx)
Profile: FULL_PROFILE
Version: OpenCL 1.2 AMD-APP (1214.3)
Extensions: cl_khr_fp64 cl_AMD_fp64 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_3d_image_writes cl_khr_byte_addressable_store cl_khr_gl_sharing cl_ext_device_fission cl_AMD_device_attribute_query cl_AMD_vec3 cl_AMD_printf cl_AMD_media_ops cl_AMD_media_ops2 cl_AMD_popcnt
Que dois-je faire pour avoir accès au GPU? Merci d'avance. Je travaille sur Ubuntu 14.04.3 LTS Trusty
voici ma carte graphique:
[thomas@elsa:~]$ lspci | grep -i --color 'vga'
00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v3/4th
Gen Core Processor Integrated Graphics Controller (rev 06)
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Oland XT [Radeon HD 8670 / R7 250/350]
Vous êtes sûr que vous avez bien installé?
Ce que je pense, c'est que votre version OpenCL est obsolète. Je me réfère au journal que vous avez posté:
Device OpenCL C version: OpenCL C 1.2
Driver version: 1214.3 (sse2,avx)
Profile: FULL_PROFILE
Version: OpenCL 1.2 AMD-APP (1214.3)
La dernière version est 2.0 et non 1.2: /
Essayez ce lien pour une version plus récente:
http://support.AMD.com/en-us/kb-articles/Pages/OpenCL2-Driver.aspx