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Subject: Re: [hwloc-users] hwloc get cpubind function
From: Gabriele Fatigati (g.fatigati_at_[hidden])
Date: 2011-08-10 09:28:08


Hi Samuel,

please show this little example:

hwloc_obj_t core = hwloc_get_obj_by_type(topology, HWLOC_OBJ_MACHINE, 0);

int return_value = hwloc_get_last_cpu_location(topology, core->cpuset,
HWLOC_CPUBIND_THREAD);

and now in "core->cpuset" I get the new cpuset bitmap, where process/threads
runs. Is it right?

2011/8/10 Samuel Thibault <samuel.thibault_at_[hidden]>

> Gabriele Fatigati, le Wed 10 Aug 2011 09:35:19 +0200, a écrit :
> > these lines, doesn't works:
> >
> > set = hwloc_bitmap_alloc();
> > hwloc_get_cpubind(topology, &set, 0);
> >
> > hwloc_get_cpubind() crash, because I have to pass set, not &set i
> suppose.
>
> Right, of course.
>
> > I think hwloc_get_last_cpu_location() is used coupled
> with hwloc_get_cpubind()?
>
> Well, they don't _have_ to. They provide a different information. It
> just happens that get_last_cpu_location usually returns an index withing
> what get_cpubind returns ("always", if the binding is strict).
>
> Samuel
> _______________________________________________
> hwloc-users mailing list
> hwloc-users_at_[hidden]
> http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-users
>

-- 
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