[Cialug] Seconds only timestamp

[Zachary Kotlarek]

On Jun 15, 2014, at 4:52 PM, Brian Wood <woodbrian77 at gmail.com> wrote:

> Is there an api that returns just the number of seconds?  Currently
> I'm using clock_gettime and  CLOCK_REALTIME_COARSE.  The
> docs say that CLOCK_REALTIME_COARSE is;
> 
> "A faster but less precise version of CLOCK_REALTIME."
> 
> I don't know how coarse it is, but I only care about the seconds.


CLOCK_*_COARSE returns the time as it was at the last tick — so typically something around 1ms accuracy depending on your tick configuration.

Depending on where you’re running (new-ish libc, hardware with synced TSC) gettimeofday() might already be using a userspace time source, but you can select for yourself using CLOCK_*_COARSE.

	Zach

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