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SubjectRe: gettimeofday() non-monotonic on SMP kernel version 2.2.10
Date
"Sam Thompson" <samuelt@caltech.edu> wrote:

> to gather data using a quad-processor SGI Visual Workstation 540. However,
> we are having trouble that we have diagnosed as a timing issue.
> gettimeofday() is non-monotonic

This is a known bug on some machines with asynchronous TSCs. To make sure
Linux can handle it use at last 2.2.15!

> Can anyone point me to a patchfor 2.2.10 or a way to quickly modify the
> 2.2.10 code to fix this problem.

When you really have to stay with 2.2.10 (something I don't recommend), try
the patch from Ingo Molnar I've uploaded at

http://www.informatik.uni-rostock.de/~hopf/linux-patches/

Bye,
Mark

--
mark-andre.hopf@innominate.de
software engineer innominate AG
networkingpeople
tel: +49.30.308806-0 fax: -77 web: http://innominate.de

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