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<== Date ==> <== Thread ==>

Subject: Re: Strange performance results -- any ideas?
From: Martin Konrad <konrad@ikp.tu-darmstadt.de>
To: tech-talk@aps.anl.gov
Date: Tue, 19 Jun 2012 13:13:36 +0200
Hi Dirk,
> But does anyone have an idea why is there this strange performance drop
> for sizes between 1024 and 4096 elements?
Just guessing: Maybe this has something to do with the cache size of
your CPU? If the amount of data exceeds the cache size it might be
everything has to be transferred to the much slower main memory?

Cheers

Martin

-- 
Dipl. Phys. Martin Konrad
Technische Universität Darmstadt
Institut für Kernphysik
Schlossgartenstr. 9
64289 Darmstadt
Tel.: +49-6151-16-5121
Fax: +49-6151-16-4321

References:
Strange performance results -- any ideas? Dirk Zimoch

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