[ovs-dev] [bug15171 3/4] timeval: Increase accuracy of cached time 4X, from 100 ms to 25 ms.
Ben Pfaff
blp at nicira.com
Wed Mar 6 05:37:58 UTC 2013
On Tue, Mar 05, 2013 at 04:52:53PM -0800, Ethan Jackson wrote:
> > With CFM and other tunnel monitoring protocols, having a fairly precise
> > time is good. My measurements don't show this change increasing CPU use.
> > (In fact it appears to repeatably reduce CPU use slightly, from about
> > 22% to about 20% with 1000 CFM instances, although it's not obvious why.)
> >
>
> That's surprising. I wonder if it's reducing our likelihood of doing an
> immediate poll loop wake due to inaccurate timers. Anyways, looks good.
>
> Acked-by: Ethan Jackson <ethan at nicira.com>
Thanks. I'm going to push these first three patches to master in a
minute.
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