Are you talking about logical ids (the one given by hwloc) or physical/OS ids (the one given by the OS and possibly in strange order) ? You should avoid using physical ids, but...

If logical, you can hwloc_get_obj_by_type() to get the corresponding object, then use its ->cpuset.

If physical, you just need a cpuset that contains the bit corresponding to this id. You can use hwloc_bitmap_only(set, <id>) to reset a (previously allocated) cpuset to nothing but this id.

Brice



Le 18/08/2011 10:10, PULVERAIL Sébastien a écrit :

Hi,

 

I’m looking for a function that allows to bind the current thread to a specific cpu given by its id.

 

I found the function hwloc_set_thread_cpubind to bind a thread to a cpuset.

I also found the function hwloc_bitmap_singlify to keep only one index in the cpuset.

But I didn’t found anything to only keep the cpu I need in my cpuset…


Is it possible ?

 

Best regards

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Sébastien Pulvérail | Sogeti High Tech

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