Timers and timing, was: MySQL Performance 6.0rc1

[Benjamin Lutz]

Chuck Swiger wrote:
> For one case, I have some code which needs to update statistics like
> "packets sent per second" (or "per minute" or "per hour") on a periodic
> basis.  I use a reasonable timeout-- ~50ms-- for a call to select() (or
> pcap_dispatch(), etc) so I check time() perhaps 20 times a second, and
> then update my per-second stats when I notice that time(&now) returns a
> different value.
> 
> Is there a better way of running code once a second, as close to the
> time the clock ticks?

Once you've seen the clock tick, you can then probably use a longer
timeout in the next select, something in the 700ms range?

Cheers
Benjamin
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