On Wed, 16 May 2012, Jason Hellenthal wrote:
Does anyone have a quick list of high-resolution timer functions? Both
user-land and kernel-land? It would be greatly appreciated (doing some
performance timing for applications).
clocks(7) - various system timers
getitimer(2), setitimer(2) - get/set value of interval timer
see ( man -k timer ) list for some other references.
I think the original poster wants timestamping functions. "Timer function"
normally means a timer-interrupt-scheduling function. clocks(7) is bogus
and more than 10 years out of date. It is mostly about hardware and
virtual clock oscillators that may be used to build timestamping and timer
functions (mostly the former).
I am not sure what sort of high resolution you are refering to but maybe
these will lead you in the right direction. Bruce Evans CCd - he may
have quite a bit that could be added to this. I always find what he has
to say very enlightening.
Generally, some of the timestamping functions have high resolution, but
are too slow to use if you make a lot of timestamps, and if you don't
make a lot of timestamps then you don't need very high resolution.
Bruce
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