Re: (RS) hi-res clock function
Re: (RS) hi-res clock function
- Subject: Re: (RS) hi-res clock function
- From: Alastair Houghton <email@hidden>
- Date: Wed, 25 Oct 2006 13:07:39 +0100
On Oct 25, 2006, at 1:00 PM, Alastair Houghton wrote:
On Oct 25, 2006, at 12:48 PM, Roland Silver wrote:
A related experiment shows that the resolution of the GNU clock()
function on the PowerBook is no less than 16 usec.
You mean the ISO C clock() function. It isn't a GNU function.
Is there a function like clock() that returns time (since some
origin) directly to a finer resolution than clock does?
Take a look at the man page for gettimeofday(2).
Just to add to that, you might find that it doesn't have a higher
resolution, in which case you might need to use something system
dependent. (The PowerPC timebase register, for instance). It might
be worth checking the Mach APIs to see if there's something that lets
you do that kind of thing in a non-system-specific manner (you'll
need to download xnu and look in the osfmk/man folder for the docs).
Of course, I'm sure someone else will point out some other time API
any minute now that fits the bill :-)
Kind regards,
Alastair.
--
http://alastairs-place.net
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