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Old 2011-02-03, 02:59   #6
P90 years forever!
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Aug 2002
Yeehaw, FL

1B7616 Posts

Originally Posted by Andrew Thall View Post
I pulled some single CPU times off the benchmark pages but would be interested in the sorts of speedups you get with multiple cores...I did some early experiments with multicore FFTW that left me less than thrilled, but that was a few years ago, and I'd like to hear how your well-tuned FFTs perform.
Prime95 FFTs are well-tuned for single core only. Multi-threading was wedged in as an afterthought. The reason for this is simple: no matter how effective the multi-threaded version is, prime95 will get more throughput by testing one exponent on each core.

P.S. I'm glad the community sent you the information you needed. I eagerly await studying your preprint.

Last fiddled with by Prime95 on 2011-02-03 at 03:01
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