SCHED_ULE(4) BSD Kernel Interfaces Manual SCHED_ULE(4)
NAME
sched_ule — ULE scheduler
SYNOPSIS
options SCHED_ULE
DESCRIPTION
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.
SEE ALSO
HISTORY
The sched_ule scheduler first appeared in FreeBSD 5.1.
AUTHORS
Jeff Roberson <jeff AT FreeBSD DOT org>
BSD August 10, 2012 BSD