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sched_ule — ULE scheduler
The sched_ule scheduler provides a number of advanced scheduler features not present in sched_4bsd(4), the traditional system scheduler. These features address SMP and interactivity and include: · Thread CPU affinity. · CPU topology awareness, including for hyper-threading. · Per-CPU run queues. · Interactivity heuristics that detect interactive applications and schedules them preferentially under high load. The following sysctls are relevant to the operation of sched_ule: kern.sched.name This read-only sysctl reports the name of the active scheduler. kern.sched.quantum This read-write sysctl reports or sets the length of the quantum (in micro-seconds) granted to a thread.
The sched_ule scheduler first appeared in FreeBSD 5.1.
Jeff Roberson <jeff@FreeBSD.org>