http://svnweb.freebsd.org/base/head/sys/sys/imgact.h

kib added rudimentary support for this in January

On Tue, Jun 14, 2011 at 6:11 PM, Luigi Rizzo <ri...@iet.unipi.it> wrote:
> there were discussions at some point on an imprecise but
> fast implementations of gettimeofday() that would not require
> a system call (perhaps mmapping some memory region which
> is opportunistically updated).
>
> Does anyone remember what happened about that ?
>
> Otherwise, is there any place in the kernel where i can fetch
> a struct timeval which is not off by more than, say 1 tick ?
>
> cheers
> luigi
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