All the functions in the libc do not show me nanosecond's precision. What
they do is get a microsecond number and multiply it by 1000. So, I realized
that it has to be that way because it's impossible to get a nanosecond's
precison on a machine with a 2Ghz clock. The system needs more than a
nanosecond to execute an instruction, so any nanosecond's precision, at
leas on a 2Ghz machine, should be inaccurate. I'm just sharing what I've
found.
Anyway, I'd like to thank everyone who helped me with this question.
Steve Graegert
<[EMAIL PROTECTED]
com> To
Sent by: "[EMAIL PROTECTED]"
linux-c-programmi <[EMAIL PROTECTED]>
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Subject
Re: Nanoseconds precision
08/25/2005 09:40
AM
On 8/25/05, [EMAIL PROTECTED] <[EMAIL PROTECTED]>
wrote:
>
> Hello all,
>
> I need to get nanosecond's precision from the time of my system. I've
> analyzing the code of the "date command" and it seems it really doesn't
> show me nanosecond's precision, what it, in fact, does is just multiply
by
> 1000 a microsecond's precison number that it gets from a system call.
Does
> anybody know how I can really get a nanosecond's precision from my
system?
librt contains time-related functions with nanosecond precision. To
see what inside try this:
$ nm /lib/librt.so.1 | grep clock_
I am sure, there is something of use for you.
Regards
\Steve
--
Steve Graegert <[EMAIL PROTECTED]>
Software Consultancy {C/C++ && Java && .NET}
Mobile: +49 (176) 21248869
Office: +49 (9131) 7126409
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