Re: timekeeping regression?

[Thor Lancelot Simon <tls%panix.com@localhost>]

On Fri, Jun 07, 2024 at 09:16:25PM -0700, Greg A. Woods wrote:
> 
> As a side note:  NetBSD can't keep time under VirtualBox (on macos), at
> least not the way I was trying to run it.  However it works A-OK under
> the macos hypervisor (x86 that is, I'm using UTM to configure and manage
> it, and UTM uses QEMU for device emulation).  It's using ichlpcib0 as
> its preferred timecounter (with TSC having been given a q of -100).

Time slips badly enough under heavy load that it can't keep time while
compiling NetBSD on GCP VMs, either, even with ntpd running.  It loses a
minute or so per hour.  This is with NetBSD-10.

I believe Google's hypervisor for GCP is KVM-like.

-- 
  Thor Lancelot Simon	                                     tls%panix.com@localhost

  "The inconsistency is startling, though admittedly, if consistency is to
   be abandoned or transcended, there is no problem."	      - Noam Chomsky