Hi Alexander,
On Fri, May 12, 2017 at 03:54:12PM +0200, Alexander Bluhm wrote:
| On Fri, May 12, 2017 at 01:00:22PM +0200, Paul de Weerd wrote:
| > Is this a misconfiguration on my end or a bug?
|
| There is an easy way to detect this, run a loop in the guest system:
|
| root@q71:~# while sleep 1; do date; done
| Fri May 12 06:27:20 CEST 2017
| Fri May 12 06:27:22 CEST 2017
| Fri May 12 06:27:24 CEST 2017
|
| I see it on a fully emulated amd64 qemu. As a workaround I compile
| my guest kernel with option HZ=50.
Thanks for your reply. Yours and an off-list reply both pointed at
the HZ parameter. I built a kernel with HZ=1000, and things now work
much better in the vm.
| Problem is that the host clock and the guest clock a ticking
| with exactly the same frequency. Then interrupts are lost.
| This has been discussed with mlarkin@, he knows more details.
|
| I am not aware of a fix.
If not a fix, this is a fine workaround.
Thanks to all involved in the development of vmm, it's really useful
for testing lots of things!
Cheers,
Paul 'WEiRD' de Weerd
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