Le 12/09/2011 13:58, Gabriele Fatigati a écrit : > Hi Brice, > > but in the manual is not written that get_cpubind() returns the > logical OR of the binding of all threads... I ever understand that > returns the bind of the calloer, where the caller can be process or > thread..
A process is a container that contains one or several threads. The binding is where something can run. It's normal that "where a process can run" is "where any of its threads can run", which means it's the logical OR of their binding. > > I'm mixing bind of process and threads, and I've noted that if the > process and thread are on the same NUMA node, works well, also on > different cores. > > If the NUMA node of process is different of NUMA node of threads, > there is a problem. > Well, the first thing to understand is what you're trying to do here. In the vast majority of cases, binding a thread outside of the binding of the corresponding process looks like buggy programming. Brice
