| eventtimers.4 (232920) | eventtimers.4 (247812) |
|---|---|
| 1.\" Copyright (c) 2010 Alexander Motin <mav@FreeBSD.org> 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 8 unchanged lines hidden (view full) --- 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" | 1.\" Copyright (c) 2010 Alexander Motin <mav@FreeBSD.org> 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 8 unchanged lines hidden (view full) --- 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" |
| 25.\" $FreeBSD: head/share/man/man4/eventtimers.4 232920 2012-03-13 10:54:14Z mav $ | 25.\" $FreeBSD: head/share/man/man4/eventtimers.4 247812 2013-03-04 19:10:39Z davide $ |
| 26.\" 27.Dd March 13, 2012 28.Dt EVENTTIMERS 4 29.Os 30.Sh NAME 31.Nm eventtimers 32.Nd kernel event timers subsystem 33.Sh SYNOPSIS --- 104 unchanged lines hidden (view full) --- 1381, 2 or 4, depending on configured HZ value. 139.It Va kern.eventtimer.idletick 140makes each CPU to receive every timer interrupt independently of whether they 141busy or not. 142By default this options is disabled. 143If chosen timer is per-CPU 144and runs in periodic mode, this option has no effect - all interrupts are 145always generating. | 26.\" 27.Dd March 13, 2012 28.Dt EVENTTIMERS 4 29.Os 30.Sh NAME 31.Nm eventtimers 32.Nd kernel event timers subsystem 33.Sh SYNOPSIS --- 104 unchanged lines hidden (view full) --- 1381, 2 or 4, depending on configured HZ value. 139.It Va kern.eventtimer.idletick 140makes each CPU to receive every timer interrupt independently of whether they 141busy or not. 142By default this options is disabled. 143If chosen timer is per-CPU 144and runs in periodic mode, this option has no effect - all interrupts are 145always generating. |
| 146.It Va kern.eventtimer.activetick 147makes each CPU to receive all kinds of timer interrupts when they are busy. 148Disabling it allows to skip some 149.Fn hardclock 150calls in some cases. 151By default this options is enabled. 152If chosen timer is per-CPU, this option has no effect - all interrupts are 153always generating, as timer reprogramming is too expensive for that case. | |
| 154.El 155.Sh SEE ALSO 156.Xr apic 4 , 157.Xr atrtc 4 , 158.Xr attimer 4 , 159.Xr hpet 4 , 160.Xr timecounters 4 , 161.Xr eventtimers 9 | 146.El 147.Sh SEE ALSO 148.Xr apic 4 , 149.Xr atrtc 4 , 150.Xr attimer 4 , 151.Xr hpet 4 , 152.Xr timecounters 4 , 153.Xr eventtimers 9 |