Hm. We should be. Here's the hwloc plugin code for setting CPU affinity (it's
static because it's invoked by function pointer):
static int module_set(opal_paffinity_base_cpu_set_t mask)
{
int i, ret = OPAL_SUCCESS;
hwloc_cpuset_t set;
hwloc_topology_t *t = &mca_paffinity_hwloc_component.topology;
set = hwloc_cpuset_alloc();
hwloc_cpuset_zero(set);
for (i = 0; ((unsigned int) i) < OPAL_PAFFINITY_BITMASK_T_NUM_BITS; ++i) {
if (OPAL_PAFFINITY_CPU_ISSET(i, mask) &&
i < mca_paffinity_hwloc_component.cpuset_max_size) {
hwloc_cpuset_cpu(set, i);
}
}
if (0 != hwloc_set_cpubind(*t, set, 0)) {
ret = OPAL_ERR_IN_ERRNO;
}
hwloc_cpuset_free(set);
return ret;
}
On Jun 23, 2010, at 4:14 PM, Brice Goglin wrote:
> I see this in the solaris binding core:
>
> if (hwloc_cpuset_weight(hwloc_set) != 1) {
> errno = EXDEV;
> return -1;
> }
>
> OMPI doesn't get this error ?
>
> Brice
>
>
>
>
> Le 23/06/2010 21:56, Terry Dontje a écrit :
>> Does hwloc think it supports binding processes to sockets or multiple cpus?
>> I am asking because I believe there are no current Solaris accessors that
>> support this (processor_bind only binds a pid or a set of pids to a *single*
>> processor).
>>
>> I bring this up because in testing OMPI with hwloc support it looks like
>> -bind-to-socket is acting like -bind-to-core on Solaris. I believe the
>> issue is hwloc should be returning an error to tell OMPI it cannot
>> bind-to-socket or multiple cpus at that.
>>
>> --
>> <ATT2811223.gif>
>> Terry D. Dontje | Principal Software Engineer
>> Developer Tools Engineering | +1.650.633.7054
>> Oracle - Performance Technologies
>> 95 Network Drive, Burlington, MA 01803
>> Email terry.don...@oracle.com
>> --
>> <ATT2811225.gif>
>> Terry D. Dontje | Principal Software Engineer
>> Developer Tools Engineering | +1.650.633.7054
>> Oracle - Performance Technologies
>> 95 Network Drive, Burlington, MA 01803
>> Email terry.don...@oracle.com
>>
>>
>> _______________________________________________
>> hwloc-users mailing list
>>
>> hwloc-us...@open-mpi.org
>> http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-users
>>
>>
>>
>
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> http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-users
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