sched_ule4
Ule scheduler
Usage
options SCHED_ULE
Overview
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:
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Thread CPU affinity.
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CPU topology awareness, including for hyper-threading.
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Per-CPU run queues.
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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
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This read-only sysctl reports the name of the active scheduler.
- kern.sched.quantum
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This read-write sysctl reports or sets the length of the quantum (in micro-seconds) granted to a thread.
Releases
51 releases since FreeBSD 5.4-RELEASE; the text changed 35 times.