Hi :) On Sat, Feb 5, 2011 at 00:11, Sri Ram Vemulpali <sri.ram.gmu06@xxxxxxxxx> wrote: > Hi all, > > I have doubt regarding how the thread affinity (to processor) is > defined in a process (task). If there is only single thread in a > process, then when process calls itself on binding to a core, will let > run on that core forever. But, what if there are multiple threads, in > a process (task). If the main thread calls set affinity to a core, is > it going to get inherited to all other threads, or just the calling > thread in a task. What happens when forked a process with threads that > has affinity to a core. AFAIK, forked process (or thread) initially inherit the affinity property of the parent process. As for thread, I think kernel will make as long as possible (or maybe forbid) the thread to have different affinity. The reason could be to avoid too many cache invalidation / ping pong between cores. -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
