Re: Hiresolution time measurement on linux

[Ramkumar Iyer <ramkumar.iyer@xxxxxxxxx>]

check out getitimer and setitimer calls ........

"from the man pages "

ITIMER_REAL    decrements in real time, and delivers SIGALRM upon
expiration.

 ITIMER_VIRTUAL decrements only when the process is executing, and
delivers SIGV­
                      TALRM upon expiration.

 ITIMER_PROF    decrements  both when the process executes and when the
system is
                      executing on behalf of the process.  Coupled with
ITIMER_VIRTUAL,
                      this  timer  is  usually  used  to  profile the
time spent by the
                      application in user and kernel space.  SIGPROF is
delivered  upon
                      expiration.


> Hi,
>
> What is the best method of measuring time intervals in linux
> user space? I would prefer the method to be independant of
> settimeofday() calls.
>
> Is there is Linux parallel for the Solaris gethrtime() sys call?
>
> Thanks,
>
> Harshal Pradhan
> --
> "I am getting pretty good at running diff and patch now"
>         - Jeff Merkey
>
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