Hello,
I'm experiencing some odd timing issues on OpenBSD 6.2 (and 6.1) on the
system listed below. This is preventing me from running OpenBSD on my
servers. Can you determine if this is a bug in the OpenBSD operating
system? I can provide more information if needed.
Virtualized environment.
On Tue, Dec 26, 2017 at 12:27:31PM -0500, Andrew Davis wrote:
> Hello,
>
> I'm experiencing some odd timing issues on OpenBSD 6.2 (and 6.1) on the
> system listed below. This is preventing me from running OpenBSD on my
> servers. Can you determine if this is a bug in the OpenBSD operating system?
Hello,
No, I didn't changing the kern.timecounter selection directly. I had
tried disabling the HPET on qemu/kvm (which may have affected this
selection?).
Two of my boxes, both OpenBSD 6.1 report this:
# sysctl kern.timecounter
kern.timecounter.tick=1
kern.timecounter.timestepwarnings=0
ker
On Tue, Dec 26, 2017 at 03:24:03PM -0500, Andrew Davis wrote:
> Hello,
>
> No, I didn't changing the kern.timecounter selection directly. I had tried
> disabling the HPET on qemu/kvm (which may have affected this selection?).
>
> Two of my boxes, both OpenBSD 6.1 report this:
>
> # sysctl kern.t
Hello again,
I tested with each of the "acpihpet0", "acpitimer0", and "i8254" timers.
The timing problem manifested when using all 3 timers. I ran the date
loop with "acpihpet0" and "acpitimer0" until the issue manifested, and
let "i8254" run overnight.
Here are some snippets from the date l
> From: Andrew Davis
> Date: Wed, 27 Dec 2017 11:39:54 -0500
>
> Hello again,
>
> I tested with each of the "acpihpet0", "acpitimer0", and "i8254" timers.
> The timing problem manifested when using all 3 timers. I ran the date
> loop with "acpihpet0" and "acpitimer0" until the issue manifested
Would this be consistent with the PIT taking longer to respond? The mode of
KVM used here (mentioned on the KVM list) moves the PIT to userspace and
would make it less accurate. If I'm reading OpenBSD's LAPIC calibration code
right, this might be the case. I believe Linux uses one of the PM Timer o
Hi,
I'm experiencing this issue too.
On Tue, Dec 26, 2017 at 12:27:31PM -0500, Andrew Davis wrote:
> Virtualization software: QEMU + KVM (2.10.0-1.fc27)
FWIW, there are reports that this bug is absent from qemu-2.11.0.
--
Best Regards
Edd Barrett
http://www.theunixzoo.co.uk
