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Message boards : Number crunching : Longer tasks?

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vaughan
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Message 127 - Posted: 2 Apr 2015, 1:46:51 UTC
Last modified: 2 Apr 2015, 1:47:22 UTC

My Xeon E5-2620 @ 2.0GHz Win 7 64-bit 8GB ram, is taking much longer to process tasks than other machines, tasks are at 13+ hours with 1 second remaining and stuck on 99.997% completed but never finish.

Why?

Profile Daniel
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Message 128 - Posted: 2 Apr 2015, 3:45:44 UTC - in response to Message 127.

It is hard to say. Our application is memory intensive which could be the bottleneck with too much swapping to disk. Our client computers cannot run four tasks simultaneously any more, so one task has the message "waiting for memory".

You might be able to identify the problem by running the app with "in" files of your choice. For instance, an "in" file with the single line "2,500" would check all primes from 2 to 502. Our workunits are now as high as 177 million ("177000000,500").


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