[kwlug-disc] benchmark: performance on six cores = 1 on one core = 6
ldpaniak at fourpisolutions.com
Wed Jun 2 19:29:18 EDT 2010
Not that surprising. Modern CPU cores are the fastest component in a
system - by an order of magnitude. Once you get outside of the L2
cache, performance takes a big hit. If a job will fit in one core
+on-die memory, it will run much faster than the same job spread over
several fractionally used cores.
Too bad the whole internet does not yet fit in a single CPU core. If it
did, then his test program would model actual usage.
And for high-performance couputing, turn off the hyperthreading. It
just confuses things.
On Wed, 2010-06-02 at 19:08 -0400, Richard Weait wrote:
> Benchmarking a server application finks that performance is six times
> better when restricted to a single core
> kwlug-disc_kwlug.org mailing list
> kwlug-disc_kwlug.org at kwlug.org
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