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SCHED_ULE(4) FreeBSD Kernel Interfaces Manual SCHED_ULE(4) NAME sched_ule -- ULE Scheduler SYNOPSIS options SCHED_ULE DESCRIPTION The sched_ule scheduler is an experimental scheduler that provides a num- ber of advanced scheduler features not present in sched_4bsd(4), the default system scheduler. These features address SMP and interactivity and include: +o Thread CPU affinity. +o CPU topology awareness, including for hyper-threading. +o Per-CPU run queues. +o 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. The sched_ule scheduler is disabled by default as it is experimental. See the BUGS section for more information. SEE ALSO sched_4bsd(4), sysctl(8) HISTORY The sched_ule scheduler first appeared in FreeBSD 5.1. AUTHORS Jeff Roberson <jeff@FreeBSD.org> BUGS As an experimental scheduler, sched_ule is not enabled by default due to a number of known issues, including weak performance with several known workloads, and reports of instability. Deployment of sched_ule in pro- duction environments should be done cautiously. FreeBSD 6.0 April 7, 2005 FreeBSD 6.0
NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | HISTORY | AUTHORS | BUGS
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