Hi, Thank you very much for your response Ulf. It is a very clear answer. Thanks again.
By the way, any information for the Linux case? Regards, Mehmet On Thu, Jan 8, 2009 at 10:08 AM, Ulf Lilleengen <ulf.lilleen...@gmail.com>wrote: > On Thu, Jan 08, 2009 at 04:23:08AM -0500, Mehmet Ali Aksoy TÜYSÜZ wrote: > > Hi all, > > > > After I had a bit googling I got confused. > > > > My questions are simple and they are as follows : > > > > 1-) "Are pthreads (or threads in general) of one process scheduled to > > different cores on multi-core systems running Linux or BSD?" > > > The standard threading library in FreeBSD will use a 1:1 mapping between > userland threads(pthreads) and kernel threads. This means that each thread > may run on a different core than other threads. > > > 2-) What if there are multiple processes which have multiple threads? > Does > > it change the answer of (1)? > No, the same mapping applies. Although threads of one process may > preferably > run on the same core, each thread of a process may run on any of the cores > available. > > > > > I found some answers but they are not sharp. Somebody says "can be > > scheduled" but "can be" is not a precise answer (in my opinion.) > Well, it means that there are more factors deciding where a thread is put. > If > you look at a factor such as affinity, one thread may preferable be > scheduled > to the same core since the cache may contain data relevant to the thread. > > > > > Thanks everybody in advance. > > > Hope everything is at least a bit clearer. > > -- > Ulf Lilleengen > _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
