Re: DECstation 5000/200 timekeeping

["Maciej W. Rozycki" <macro%orcam.me.uk@localhost>]

On Sun, 31 Oct 2021, Jonathan Stone wrote:

> >> This really looks to me as though the clock interrupt is low enough
> >> priority to get locked out by SCSI, serial, and/or Ethernet
> >> interrupts; it reminds me of running NetBSD/mac68k, years ago.
> > Hmm, that's an r4400 or somesuch, isn't it?
> [...]
> 
> Did you submit a PR for the broken time-keeping?

 Hmm, as it happens we have a timekeeping problem with the VAX port too, 
cf. PR port-vax/56383, so I wonder if this is something generic, perhaps 
specific to slower systems which can miss interrupts more easily if we're 
not careful enough in making them delivered in a timely manner.

  Maciej