Le 28/08/2011 12:14, Gabriele Fatigati a écrit :
> Dear hwloc users,
>
> what happens if I use hwloc on a non-NUMA machine? I suppose memory
> binding has no sense because there is not a memory locality concept.
> And regards execution binding? are there some difference on a non-NUMA
> machine?
Hello Gabriele,
Execution binding remains exactly the same.
Memory binding has no sense on non-NUMA machine but it's still available
for application portability (it basically just does nothing).
> Is there a hwloc routine to check this?
get_nbobjs_by_type(topology, HWLOC_OBJ_NODE) tells how many NUMA node
objects exist.
If you get >1, the machine is NUMA.
If the non-NUMA case, I think you can get 0 or 1 depending on whether
the OS is NUMA-aware or not (not sure we should remove this possible
difference).
Brice
|
![[Flag]](../../../../../community/mirrors/flag-us.gif){kind=small}