Forum > GPU crunching

ATI OpenCL AstroPulse (rev516) released

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Raistmer:

--- Quote from: benool on 18 Mar 2011, 05:13:03 pm ---Seems to work great on my ATI 4550.  :-*

I had to set -unroll 5 instead of 10 otherwise I get computation errors.

--- End quote ---
Link to host?

benool:
http://setiathome.berkeley.edu/results.php?hostid=4876884

Raistmer:
If you want to debug this problem you ould install APP SDK from AMD and check kernel exeution times under profiler. It's possible that they just take too long on this GPU (only 2 compute devices, 128 threads instead of 256, lower freq than on HD4870). First reported error appears inside FFT call.

benool:
okay, I got the SDK installed and figured out how to launch the app with the profiler.

Is there any particular option I should add to sprofile or are the defaults what you are looking for?

I'll do a pass with unroll at 10 and another with 5.

Raistmer:
defaults will go OK.

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