MultiGPU

[wojek]

And what are your GPUs ?
Name them(or better yet, provide with GPU-Z screenshots).
If you have AMD gpus then it's ok, AMD never fixed OpenCL-Multigpu on Linux OS.

It is Linux, and my GPUs are:

1xHD5870
1xHD5890

and I guess the problem is what you've mentioned about issue with linux, but one of the OCL examples from ATI SDK seems to be working:

wojek@mars:/opt/ati-stream-sdk-v2.2-lnx64/samples/opencl/bin/x86_64$ ./SimpleMultiDevice
----------------------------------------------------------
CPU + GPU Test 1 : Single context Single Thread
----------------------------------------------------------
Total time : 59
Time of CPU : 56.6358
Time of GPU : 4.53311
----------------------------------------------------------
CPU + GPU Test 2 : Multiple context Single Thread
----------------------------------------------------------
Total time : 59
Time of CPU : 57.2354
Time of GPU : 2.1913
----------------------------------------------------------
CPU + GPU Test 3 : Multiple context Multiple Thread
----------------------------------------------------------
Total time : 18
Time of CPU : 18.1377
Time of GPU : 2.27059
----------------------------------------------------------
Multi GPU Test 1 : Single context Single Thread
----------------------------------------------------------
Total time : 14
Time of GPU0 : 2.21391
Time of GPU1 : 2.23968
Time of GPU2 : 1.45529
----------------------------------------------------------
Multi GPU Test 2 : Multiple context Single Thread
----------------------------------------------------------
Total time : 27
Time of GPU0 : 2.25302
Time of GPU1 : 2.29118
Time of GPU2 : 1.45514
----------------------------------------------------------
Multi GPU Test 3 : Multiple context Multiple Thread
----------------------------------------------------------
Total time : 16
Time of GPU0 : 2.3586
Time of GPU1 : 2.27056
Time of GPU2 : 1.45647


thanks
Wojtek