mfaktc: a CUDA program for Mersenne prefactoring

[bcp19]

Originally Posted by LaurV

Do you mean 6(or 7, or 8)80 ?

More likely 670/680 (even tho 670 is not yet out)

[ET_]

Originally Posted by bcp19

More likely 670/680 (even tho 670 is not yet out)

I'd wait for a GK110...

E.T.

[TheJudger]

Originally Posted by LaurV

Do you mean 6(or 7, or 8)80 ?

670 or 680. Use your favorite search engine and ask for "regular expressions".

[LaurV]

Originally Posted by TheJudger

670 or 680. Use your favorite search engine and ask for "regular expressions".

[BigBrother]

Originally Posted by TheJudger

I guess I need to buy a GTX 6[78]0... ;)

Well, mfaktc works on my brand new GTX680 after compiling it with CUDA Toolkit 4.2 and sm_30.

[bcp19]

Originally Posted by BigBrother

Well, mfaktc works on my brand new GTX680 after compiling it with CUDA Toolkit 4.2 and sm_30.

Can you give us some exponents run and timings? Edit: forgot % GPU usage and # of instances.

[James Heinrich]

Originally Posted by bcp19

Can you give us some exponents run and timings? Edit: forgot % GPU usage and # of instances.

For my purposes of updating the chart at http://mersenne-aries.sili.net/mfaktc.php can I request that you run through an exponent on a single mfaktc instance, even if it doesn't max out your GPU. And let me know:
* what assignment (e.g. Factor=123456789,68,70)
* wall-clock runtime to complete exponent (e.g. 1h23m45s)
* average GPU usage (e.g. 56%)
* average SievePrimes value

[BigBrother]

Originally Posted by James Heinrich

For my purposes of updating the chart at http://mersenne-aries.sili.net/mfaktc.php can I request that you run through an exponent on a single mfaktc instance, even if it doesn't max out your GPU. And let me know:
* what assignment (e.g. Factor=123456789,68,70)
* wall-clock runtime to complete exponent (e.g. 1h23m45s)
* average GPU usage (e.g. 56%)
* average SievePrimes value

I'm running a test right now. Is there a precise way to measure average GPU usage or do I just have to make an educated guess using GPU-Z?

[James Heinrich]

Originally Posted by BigBrother

I'm running a test right now. Is there a precise way to measure average GPU usage or do I just have to make an educated guess using GPU-Z?

GPU-Z eyeballed is perfectly fine.

[BigBrother]

Originally Posted by James Heinrich

For my purposes of updating the chart at http://mersenne-aries.sili.net/mfaktc.php can I request that you run through an exponent on a single mfaktc instance, even if it doesn't max out your GPU. And let me know:
* what assignment (e.g. Factor=123456789,68,70)
* wall-clock runtime to complete exponent (e.g. 1h23m45s)
* average GPU usage (e.g. 56%)
* average SievePrimes value

* Factor=N/A,55504619,70,71
* 0h 40m 47s
* 74% GPU usage
* SievePrimes=5000 throughout

[firejuggler]

so around 35 a day, 150 GHz day/day. one more precision if possible : which cpu?