On Friday, May 09, 2014 3:50:28 pm Peter Grehan wrote: > > How about i instead do the comprimise: > > > > * i'll pin all other swi's > > * default swi isn't pinned by default, but one can flip on a sysctl at > > boot time to pin it > > > > How's that sound? > > And also please a sysctl that disables any swi pinning. > > It is sometimes useful to change the default cpuset, for instance to > allocate a subset of CPUs to some particular applications and not > FreeBSD. Having kernel threads pinned prevents this from happening since > they are in the default set. > > (Note that some network drivers are also culprits here, though > disabling MSI-x in them is a workaround).
I'd actually like a way to exempt certain kernel threads that are inherently per-CPU (such as queues for NIC drivers or per-CPU swi threads) from the default cpuset so that they don't break 'cpuset -l 0 -s 1'. Providing some sort of way to disable the pinning for now should be good, but I think I'd eventually prefer the former suggestion. -- John Baldwin _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
