Re: gettimeofday() system call timing curiosity

From: Alan Cox (alan@lxorguk.ukuu.org.uk)
Date: Sat Mar 09 2002 - 13:51:19 EST

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> Curiously, on a 1.7GHz P4 running RH7.1 (2.4.2 i686) it never hits
> the same case, and takes slightly over a second to call gettimeofday a

Nothing curious about that I'm afraid. Every benchmark I've run on a PIV
shows that kind of behaviour - anything but perfectly predicted linear
code flow seems to hurt it. Locked operations really seem to make it suffer.
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