Subject: Re: i386 interrupt counters
To: Jonathan Stone <>
From: Chris G Demetriou <>
List: tech-kern
Date: 08/12/1996 14:55:14
> >And, having SOMETHING is far better than nothing.
> Indeed.  It suggests this machine may be losing clock ticks.  Or
> alternatively, truncation of a true clock rate rate somewhere between
> 99 and 100 is showing up, somewhat misleadingly, as 99.

More likely: adjtime was used to set the time forward.

the boottime variable is adjusted to compensate for time _sets_, but
not for time adjustments.

I've found the same effect on the Alpha, when timed causes the time to
be set forward by a small enough amount that adjtime is used.

There really should be 'monoboottime', or something, and vmstat -i
should use monotime and monoboottime.  The only problem with that
is that it requires several syscalls per time read...