Re: Weird clock behaviour with current (amd64) kernel

[David Holland <dholland-current%netbsd.org@localhost>]

On Thu, Jul 14, 2022 at 08:59:25PM +0700, Robert Elz wrote:
 > I just booted a kernel that I built (from up to date at the time)
 > HEAD sources about 24 hours ago.
 > 
 > Everything seemed to be working fine - until I noticed that all of
 > my clocks (there are several, gkrellm, window manager, a dclock,
 > and an xtu) were all wildly wrong (as in, were moving time forwards
 > incredibly slowly).

Probably not related, but see PR 56322. I have a machine where the TSC
is apparently bad, and somewhere in -current a bit more than a year
ago we stopped detecting that during boot, with negative consequences.

I used to get boot messages of the form
   autoconfiguration error: ERROR: 2607 cycle TSC drift observed

and these stopped, so if your previous kernel was fairly old and you
still have older boot logs lying around you might check them for
such notices.

-- 
David A. Holland
dholland%netbsd.org@localhost