On Thu, Jan 27, 2011 at 12:58 PM, Jeremy Chadwick <free...@jdc.parodius.com>wrote:
> > On Thu, Jan 27, 2011 at 09:38:22PM +0100, Damien Fleuriot wrote: > > On 1/27/11 8:57 PM, Jeremy Chadwick wrote: > > > > <...snipping out stuff...> > > > We're also considering moving to faster machines but I don't think that > > will help much with our problem. > > > > I suppose additional CPU cores will be of no help at all, considering > > the kernel is single threaded and runs on cpu0 only ? > > Kernel folks should be able to talk about this in detail, but my > understanding is that the kernel itself supports multiple threads, but > the question is whether or not the drivers or relevant "pieces" (e.g. > igb(4) driver, pf, TCP stack, etc.) support SMP (multi-core/threading) > or not. I think this is referred to as something being "MPSAFE" or not. > > The 8.X kernel is NOT single-threaded. Anything but. And the stack has also been improved, I believe there are still bottlenecks but its far better than the old days. The igb driver in 8.2 creates up to 8 queues on the right hardware, they are each auto-bound to a particular CPU. The older version you are running had issues and hence multiqueue was not enabled. So, do upgrade once 8.2 is finalized :) Cheers, Jack _______________________________________________ freebsd-pf@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-pf To unsubscribe, send any mail to "freebsd-pf-unsubscr...@freebsd.org"
