Hi Birce,
I'm so confused..
I'm binding MPI processes with set_cpu_bind and it works well. The problem
is when I try to bind process and threads.
It seem that thread process influence bind of main thread.
And from hwloc manual:
hwloc_set_cpubind()
Bind *current process* or thread on cpus given in bitmap set.
Why you are saying tha process bind is not possible? I'm using it and it
work well!
2011/9/12 Brice Goglin <Brice.Goglin_at_[hidden]>
> Le 12/09/2011 12:52, Gabriele Fatigati a écrit :
> > Dear hwloc users,
> >
> > I'm binding process in a NUMA node and also associated OpenMP threads.
> > I've noted that, if I bind execution of all on different cores in
> > the same NUMA node , it works well.
> >
> > If I bind process in NUMA node 0 for example, and thread on NUMA node
> > 1, the process is bound on NUMA node 1, and not 0.
> >
> > Why this? Thread binding influence bind of main process?
> >
>
> Hello Gabriele,
> At least on Linux, you cannot bind a process. When you ask hwloc to bind
> a process, it just binds all threads contained in this process. When you
> do get_cpubind on a process, it returns the logical OR of the binding of
> all threads.
> Brice
>
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>
--
Ing. Gabriele Fatigati
HPC specialist
SuperComputing Applications and Innovation Department
Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy
www.cineca.it Tel: +39 051 6171722
g.fatigati [AT] cineca.it
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