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
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