Adrian Chadd wrote: > On 05/12/2007, Philipp Wuensche <[EMAIL PROTECTED]> wrote: > >> As I understand it, and correct me if I'm wrong, polling helps against >> high interrupt rates but for that intel gigabit cards have interrupt >> moderation. We don't have a problem with interrupts (20% CPU) at the >> moment but with system (100% CPU) as you can see in the system >> monitoring graphs. Interrupts sometimes peak at, but usually are under, >> the 2k interrupts/sec limit. > > Begin by reading up on the hardware profiling support (hwpmc, pmc, > etc) and see if you can get some system and process-specific profiling > information.
Oh interesting stuff, I definitely have to take a look into that. Nice. > Kernel/System profiling will probably show you an interesting thing or > two. One thing I noticed was high in my high-TCP-transaction tests > (but not on hardware anywhere near as nice as yours!) was crypto calls > for, IIRC, syncookies. We tried with syncookies enabled and disabled, no change at all. But as you already said, crypto calls on this kind of hardware are not that expensive ;-) greetings, cryx _______________________________________________ freebsd-performance@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-performance To unsubscribe, send any mail to "[EMAIL PROTECTED]"
