Re: [patch 6/9] signalfd/timerfd v1 - timerfd core ...

Davide Libenzi
2007-03-11T05:44:25Z

On Sat, 10 Mar 2007, Linus Torvalds wrote:

> > Actually, the only place where I can find the itimerspec usefull, is
> > indeed with TFD_TIMER_SEQ. In cases where you want you clock starting at a
> > given time (it_value) *and* with the given frequency (it_interval).
>
> .. and this is where itimerspec is even better: once you have absolute
> time, *and* a process that might miss ticks (because it does something
> else), the "absolute time start + interval" thing can avoid drifting
> (which a "relative interval" has a really hard time doing).
>
> So if you want a "timer tick every second, *on* the second" kind of
> interface, you really do want a absolute time starting point, and then a
> fixed interval. Two different times.

Alrighty, I'll use a itimerspec ...

- Davide