statclock(n)
Alexander Motin
mav at FreeBSD.org
Fri Nov 19 17:45:46 UTC 2010
Hi.
Andriy Gapon wrote:
> I wonder if instead of calling statclock() multiple times (after an idle period)
> we couldn't call it just with an appropriate N parameter.
> So some stats like e.g. cp_time[] could do +=N instead of ++.
> Other stats ru_ixrss need to be updated only once.
> Similarly, N could be passed further down to sched_clock() and handled there too.
I think yes. It is reasonable. Initially hardclock() was also called in
a loop. It was just rewritten first because it is called more often
(more times), goes to hardware to sync time, and any way required
changes to work properly.
--
Alexander Motin
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