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SCHED_4BSD (4) | Special files and drivers | Unix Manual Pages | :man

NAME

sched_4bsd - "4.4BSD scheduler"

CONTENTS

Synopsis
Description
See Also
History
Bugs

SYNOPSIS


.Cd "options SCHED_4BSD"

DESCRIPTION

The sched_4bsd scheduler is the default system scheduler, providing both high throughput and solid interactive response in the presence of load.

The following sysctls are relevant to the operation of sched_4bsd:

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.
kern.sched.ipiwakeup.enabled
This read-write sysctl sets whether or not the scheduler will generate an inter-processor interrupt (IPI) to an idle CPU when a thread is woken up. Otherwise, idle CPUs will wait until the next clock tick before looking for new work.
kern.sched.preemption
This read-only sysctl reports whether or not the kernel is configured to support preemption, which reduces the latency to run lower priority threads on wakeup.

Some sysctls will be available only on systems supporting SMP.

SEE ALSO

sched_ule(4), sysctl(8)

HISTORY

BUGS


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