Date: Wed, 8 Oct 2008 17:01:44 -0400 From: John Baldwin <jhb@freebsd.org> To: Dag-Erling =?utf-8?q?Sm=C3=B8rgrav?= <des@des.no> Cc: freebsd-hackers@freebsd.org, ushasri tummala <tummala.ushasri@gmail.com> Subject: Re: What is the time between 2 mi_switches in freebsd. Message-ID: <200810081701.45199.jhb@freebsd.org> In-Reply-To: <86hc7m3kfk.fsf@ds4.des.no> References: <53fa490b0810071947j23fc0f72n5360b6f174ddc96d@mail.gmail.com> <200810081406.14916.jhb@freebsd.org> <86hc7m3kfk.fsf@ds4.des.no>
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On Wednesday 08 October 2008 04:23:43 pm Dag-Erling Sm=C3=B8rgrav wrote: > John Baldwin <jhb@freebsd.org> writes: > > There isn't a fixed timeslice due to preemption for interrupts, etc. =20 However,=20 > > the default time slice is available as the kern.sched.quantum sysctl: > > > > % sysctl -d kern.sched.quantum > > kern.sched.quantum: Roundrobin scheduling quantum in microseconds >=20 > des@ds4 ~% uname -a > FreeBSD ds4.des.no 8.0-CURRENT FreeBSD 8.0-CURRENT #48 r183493M: Tue Sep = 30=20 23:35:48 CEST 2008 des@ds4.des.no:/usr/obj/usr/src/sys/ds4 amd64 > des@ds4 ~% sysctl kern.sched.quantum > sysctl: unknown oid 'kern.sched.quantum' Apparently the quantum isn't exposed anywhere for ULE. =2D-=20 John Baldwin
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