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¶
sched_4bsd(4),
sysctl(8)
HISTORY¶
The
sched_ule
scheduler first appeared in
FreeBSD 5.1.
AUTHORS¶
Jeff Roberson
⟨jeff@FreeBSD.org⟩