Go Back > Prime Search Projects > Twin Prime Search

Thread Tools
Old 2011-07-23, 10:52   #1
amphoria's Avatar
Sep 2005

23×347 Posts
Default tpsieve-cuda slows down with increasing p

Since I switched to using tpsieve-cuda at p > 21T for the 495000-50000 sieve, I have noticed that its throughput appears to go down with increasing p: 355M p/sec at 27T down to 318M p/sec at 430T based on wall clock rather than CPU time. Throughput based on CPU time shows a similar decrease.

tpsieve throughput increased with increasing p which is what I would expect based on other sieving programs. Is the behaviour of tpsieve-cuda to be expected? Note that I have dedicated a CPU core to the sieve, although usage of the core has increased from 0.86 at 27T to 0.91 at 430T.
amphoria is offline   Reply With Quote

Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
Inconsistent factors with TPSieve Caldera Twin Prime Search 7 2013-01-05 18:32
TPSieve CUDA Testing Thread Ken_g6 Twin Prime Search 52 2011-01-16 16:09
Is TPSieve-0.2.1 faster than Newpgen? cipher Twin Prime Search 4 2009-05-18 18:36
Increasing range of attachment extensions allowed fivemack Forum Feedback 3 2007-06-05 18:07
increasing P-1 throughput with hyperthreading? hhh Software 17 2005-06-09 02:56

All times are UTC. The time now is 23:47.

Wed Apr 14 23:47:02 UTC 2021 up 6 days, 18:27, 0 users, load averages: 2.20, 1.98, 1.94

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.