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Playing with GPU and python.

• Ubuntu 11.04
• ATI 5470 graphic

1. Install the ATI driver under Linux.

2. Install OpenCL dependencies

$ apt-get install freeglut3-dev python-numpy

3. Install OpenCL, packages amd-app-2.4 and amd-app-dev. (last known link is http://forums.amd.com/forum/messageview.cfm?catid=390&threadid=125792&STARTPAGE=1&FTVAR_FORUMVIEWTMP=Linear)

4. Do a dryrun of OpenCL

$ cat "#include <CL/opencl.h>" > testcl.c
$ gcc testcl.c -o prog -lOpenCL

5. Download pyopencl. (last known link http://pypi.python.org/pypi/pyopencl)

6. Unpack and install

$ python setup.py build
$ python setup.py install 

####Part 1##### Contains a code that sums 2 vectors using GPU.

####Part 2##### Finds the prime numbers until N.

(I know there are better algorithms than the one I have implemented, but the porpuse is to test the GPU.)

####Vector Sum##### Execution time of test without OpenCL: 11.731222868 seconds

Execution time of test with OpenCL: 0.521452188492 seconds

####Prime numbers##### N=100

Execution time of test without OpenCL: 0.000123023986816 seconds

Execution time of test with OpenCL: 0.601119995117 seconds

N=1000

Execution time of test without OpenCL: 0.00573706626892 seconds

Execution time of test with OpenCL: 0.579922914505 seconds

N=10000

Execution time of test without OpenCL: 42.7467110157 seconds

Execution time of test with OpenCL: 5.0943210125 seconds

This code has not been updates since 2013 and it is less likely that will be again.

Copyright Stefan Fodor @ 2013

This program is free under the terms of GNU GPL licence.

Feel free to copy, modify and redistribute.