Subj : Re: nptl threads execution time
To   : comp.programming.threads
From : loic-dev
Date : Tue Apr 12 2005 09:57 am

Bonjour Daniel,

>  For control and feedback scheduling purpose I need to measure
> the execution time of threads, i.e. the accumulated time spent
> between the thread resume and suspension instants
> (thus I think that only the scheduler can know that)
>
>  It seems that it is not a standard feature of posix threads?
> Did somebody already made that?
>
>  I'm using a fedora core 3 system, nptl lib, 2.6.10 kernel patched
with
> high res. timers.

Perhaps I don't understand your question correctly, but wouldn't the
function clock_gettime() with a CLOCK_THREAD_CPUTIME_ID clock do it?
This function measures the time a thread has been scheduled on a
processor.

This quite new function, standardized by SUSv3,  is available on FC3.
You need to link against -lrt (real-time extension library).


Regards,
Loic.

.