sched_ule —
ULE
scheduler
options SCHED_ULE
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.
sched_4bsd(4),
sysctl(8)
The
sched_ule scheduler first appeared in
FreeBSD 5.1.
Jeff Roberson
<
[email protected]>