Joseph, I would recommend that you start with PMCStat and figure where the bottleneck is, Given that you have a two threads and your CPU is at 100%, my a apriori guess would be a contention for a spinlock, so I might also try to use LOCK_PROFILING to handle on this.
Regards Ray Kinsella On Fri, Apr 24, 2009 at 11:42 PM, Joseph Kuan <kuan....@gmail.com> wrote: > Hi all, > I have been hitting some barrier with FreeBSD 7.1 network performance. I > have written an application which contains two kernel threads that takes > mbufs directly from a network interface and forwards to another network > interface. This idea is to simulate different network environment. > > I have been using FreeBSD 6.4 amd64 and tested with an Ixia box > (specialised hardware firing very high packet rate). The PC was a Core2 2.6 > GHz with dual ports Intel PCIE Gigabit network card. It can manage up to > 1.2 > million pps. > > I have a higher spec PC with FreeBSD 7.1 amd64 and Quadcore 2.3 GHz and > PCIE Gigabit network card. The performance can only achieve up to 600k pps. > I notice the 'taskq em0' and 'taskq em1' is solid 100% CPU but it is not in > FreeBSD 6.4. > > Any advice? > > Many thanks in advance > > Joe > _______________________________________________ > freebsd-performance@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-performance > To unsubscribe, send any mail to " > freebsd-performance-unsubscr...@freebsd.org" > _______________________________________________ freebsd-performance@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-performance To unsubscribe, send any mail to "freebsd-performance-unsubscr...@freebsd.org"
