SCHED_ULE(4) | FreeBSD Kernel Interfaces Manual | SCHED_ULE(4) |
NAME
sched_ule — ULE schedulerSYNOPSIS
options SCHED_ULEDESCRIPTION
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.
HISTORY
The sched_ule scheduler first appeared in FreeBSD 5.1.AUTHORS
<jeff@FreeBSD.org>August 10, 2012 | FreeBSD |