Problem detecting GPU - Page 2

jasonp · 2013-06-14, 14:59

Do you see results accumulating in msieve.dat.p? If yes then you are using your card already, and the code automatically scales up or down the work that is given to the card based on how nice it is. There should be a fair amount of output as intermediate results get found, but the python script may be hiding that.

You can get noticeably higher throughput with problems this size by using more than one thread to feed the card (add -t 2 and see if the frequency of results increases). Otherwise you can only fiddle with polynomial selection parameters that require a fair amount of expertise to use.

firejuggler · 2013-06-14, 15:04

did you try with -g 0?

VoltsNCodes · 2013-06-14, 15:14

Quote:

Originally Posted by firejuggler

did you try with -g 0?

This was the issue, I was misinterpreting GPU_NUM for cores, which was my problem. Thank you everyone for the help, I'm excited to keep learning about this!

2013-06-14, 14:59	#12
jasonp Tribal Bullet Oct 2004 3541₁₀ Posts	Do you see results accumulating in msieve.dat.p? If yes then you are using your card already, and the code automatically scales up or down the work that is given to the card based on how nice it is. There should be a fair amount of output as intermediate results get found, but the python script may be hiding that. You can get noticeably higher throughput with problems this size by using more than one thread to feed the card (add -t 2 and see if the frequency of results increases). Otherwise you can only fiddle with polynomial selection parameters that require a fair amount of expertise to use. Last fiddled with by jasonp on 2013-06-14 at 15:00

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2013-06-14, 15:04	#13
firejuggler Apr 2010 Over the rainbow 101000101000₂ Posts	did you try with -g 0?