IPI_PREEMPTION allows the scheduler running on CPU A to preempt a thread on CPU B. This should reduce latency in some circumstances.
# PREEMPTION allows the threads that are in the kernel to be preempted # by higher priority threads. It helps with interactivity and # allows interrupt threads to run sooner rather than waiting. # WARNING! Only tested on amd64 and i386. # FULL_PREEMPTION instructs the kernel to preempt non-realtime kernel # threads. Its sole use is to expose race conditions and other # bugs during development. Enabling this option will reduce # performance and increase the frequency of kernel panics by # design. If you aren't sure that you need it then you don't. # Relies on the PREEMPTION option. DON'T TURN THIS ON. On 10/22/07, Aryeh M. Friedman <[EMAIL PROTECTED]> wrote: > > > Try adding "options FULL_PREEMPTION" to your kernel. > > > > > > > What is the difference between this and PREEMPTION + IPI_PREEMPTION? > -- Regards, Wang Yi _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
