Thanks for the info. The Linux equivalent would be sched_setaffinity which takes a bitmask as input, allowing the user to define which processors will run a particular thread. Here's a link:
http://ibm5.ma.utexas.edu/cgi-bin/man-cgi?sched_setaffinity+2 > > There's a potential for > > conflict between the kernel's use of pinning and binding for kernel > > synchronization and the user space affinity model, which will be Can you elaborate on this? Some of my colleagues and I are considering tackling this and would like to avoid such pitfalls, if possible. Aaron -------------------------- Aaron Kunze Advanced Visual Computing [EMAIL PROTECTED] --PGP Key ID: 0x81124B7C-- --NOT SPEAKING FOR INTEL-- -------GO BOILERS!!------- > -----Original Message----- > From: Daniel Eischen [mailto:[EMAIL PROTECTED] > Sent: Friday, February 23, 2007 8:09 AM > To: Robert Watson > Cc: Kunze, Aaron; [EMAIL PROTECTED]; [email protected] > Subject: Re: Setting CPU affinity to process( Freebsd smp kernel) > > On Fri, 23 Feb 2007, Robert Watson wrote: > > > On Wed, 21 Feb 2007, Kunze, Aaron wrote: > > > >> Does anyone know if this will change any time soon? For > example, is > >> anyone working on exposing affinity to user-space applications via > >> extensions of the pthreads interface? > >> > >> Sorry to reply to such an old thread... > > > > I know of no work along these lines currently, but it's something a > > lot of people would like to see happen. There's a potential for > > conflict between the kernel's use of pinning and binding for kernel > > synchronization and the user space affinity model, which will be > > entirely avoided if done right. :-) For now, it's quite > easy to add a > > sysctl/syscall that allows user space to send the kernel > scheduler's > > notion of thread binding, but this isn't really the right > approach. > > As I understand it, some systems support setting CPU > affinity for a thread as a set of CPUs it is willing to run on ? > > I know Solaris has processor_bind(2) and pset_bind(2): > > http://docs.sun.com/app/docs/doc/816-5167/6mbb2jaeu?a=expand#P > > -- > DE > _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-smp To unsubscribe, send any mail to "[EMAIL PROTECTED]"
