Re: looking for a function

["Xu Yang" <risingsunxy@googlemail.com>]

Hi Steve,

thanks for your reply :-)

I will try this. I am evaluating some scheduling algorithm, so I would
like to learn about how the threads migrate. That is why I am asking
for such kind of function.

thank for your help!

Bes regards,

Yang

2008/9/16, Steve Graegert <graegerts@gmail.com>:
> Xu Yang,
>
> On Linux sched_getcpu(3) comes to mind.  This function is not particularly
> useful since the information returned by the function might not be correct
> at the point of its return as threads can be switched to other CPUs (read:
> cores) at anytime (although CPU/core switching can be quite expensive due to
> cache line bouncing for instance)
>
> So, once the information has been obtained it might already be obsolete.
> Anyway, I hope that is what you're looking for.
>
>         \Steve
>
> --
>
> Steve Grägert
>
>
>
> On Tue, Sep 16, 2008 at 3:26 PM, Xu Yang <risingsunxy@googlemail.com> wrote:
> >
> > Hi guys,
> >
> > I am looking for a function that can show me the current thread is
> > running on which cpu.
> >
> > e.g I am using pthread to write a multithreaded program, in each
> > thread I would like to insert such kind of function so that I can know
> > on which cpu this thread is running on.
> >
> > which function should be used?
> >
> > thanks for the help!!
> >
> > best regards,
> >
> >
> >
> > Yang
> > --
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