diff options
Diffstat (limited to 'share/man/man4/eventtimers.4')
| -rw-r--r-- | share/man/man4/eventtimers.4 | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/share/man/man4/eventtimers.4 b/share/man/man4/eventtimers.4 index c935c3e..4db4420 100644 --- a/share/man/man4/eventtimers.4 +++ b/share/man/man4/eventtimers.4 @@ -24,7 +24,7 @@ .\" .\" $FreeBSD$ .\" -.Dd September 15, 2010 +.Dd March 13, 2012 .Dt EVENTTIMERS 4 .Os .Sh NAME @@ -143,6 +143,14 @@ By default this options is disabled. If chosen timer is per-CPU and runs in periodic mode, this option has no effect - all interrupts are always generating. +.It Va kern.eventtimer.activetick +makes each CPU to receive all kinds of timer interrupts when they are busy. +Disabling it allows to skip some +.Fn hardclock +calls in some cases. +By default this options is enabled. +If chosen timer is per-CPU, this option has no effect - all interrupts are +always generating, as timer reprogramming is too expensive for that case. .El .Sh SEE ALSO .Xr apic 4 , |
