select(2) timeout precision

Mike Silbersack silby at
Tue Nov 1 23:31:42 PST 2005

On Tue, 1 Nov 2005, Viktor Vasilev wrote:

> With FreeBSD 5.4-RELEASE I almost constantly get ~20000 microseconds
> delta. That is with 100HZ kernel on PIII 500MHz or Sempron 64 2800+

Put kern.hz=1000 in /boot/loader.conf to kick it up to 1000Hz, that should 
improve the accuracy a lot.

The optimizations in the url someone else posted should probably be 
integrated into FreeBSD, but moving to a higher Hz setting is a necessity 
in either case.

Mike "Silby" Silbersack

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