hi, Just a little background - I want to fire events at 10 microsecond granularity in FreeBSD, and it was suggested to use Hz=100000 in the kernel config file.
This is a good approach, only if I schedule events every 10 us ( which i am not doing ). Due to this high frequency interrupts, I am incurring a lot of overheads and deviations in firing events. I came across this other way of firing events at micro-seconds granularity, which uses "local APIC timer", by writing a us value into a register and generating the event when timer reaches zero. The implementation I know of is only in Linux. http://www.oberle.org/apic_timer.html and the technical paper is: http://stillhq.com/pdfdb/000522/data.pdf The paper shows that mean deviation of this approach is less than 3 us. But I can't find any such support for FreeBSD. Do you guys know of any such implementation for FreeBSD? Thanks for help, vaibhave _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[EMAIL PROTECTED]"
