Re: sleep sleeping too long

["Jeremy C. Reed" <reed%reedmedia.net@localhost>]

On Thu, 27 Mar 2008, Juan RP wrote:

> > tx:work$ time sleep 3 ; time sleep 5 ; time sleep 10
> >     6.81s real     0.00s user     0.01s system
> >     8.52s real     0.00s user     0.00s system
> >    25.84s real     0.01s user     0.00s system
> 
> This behaviour might be seen with a "bad" timecounter, if I'm not wrong.
> Which of them are you using? (try sysctl kern.timecounter).


$ sysctl kern.timecounter
kern.timecounter.choice = clockinterrupt(q=0, f=100 Hz) TSC(q=-100, 
f=1895564520 Hz) hpet0(q=2000, f=14318180 Hz) ACPI-Safe(q=900, f=3579545 
Hz) lapic(q=-100, f=199687388 Hz) i8254(q=100, f=1193182 Hz) 
dummy(q=-1000000, f=1000000 Hz)
kern.timecounter.hardware = hpet0
kern.timecounter.timestepwarnings = 0


I think this just started when I updated to HEAD within past few week or 
so. I am pretty sure I didn't have problem before because I was recently 
using:

sleep 2 ; xwd -out file.xwd

a lot recently. Just I noticed yesterday I was waiting a lot longer than 
two seconds for xwd to beep to tell me it was ready. (sleep was working 
fine a couple weeks ago for sure since I would have noticed this when I 
used the above about 30 times.)