Re: A few netbsd/xen questions

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Fri, Sep 25, 2009 at 11:15:49AM +0100, Hugo Silva wrote:
> Good morning,
>
> A few doubts have collected in my mind after some time playing with a  
> NetBSD 5 xen dom0:
>
>
> a)
> options        SYSCALL_STATS   # per syscall counts
> options        SYSCALL_TIMES   # per syscall times
>
> in a Xen kernel doesn't seem to work ("can't get syscall counts: No such  
> file or directory"). Just to be sure I didn't forget anything, I booted  
> another netbsd machine and compiled GENERIC with these two options, and  
> surely enough I could get the syscall counts from 'systat syscall'.

AFAIK this is completely MI, I can't see why this would not work in a Xen
guest.

>
> Related to this, is there any noticeable overhead caused by having these  
> enabled?
>
>
> b)
> In 'xm top', NETTX and NETRX were not updating as my domU was blasting  
> 7MB/s over HTTP. Could this be because my domU is HVM?

This is not implemented for NetBSD dom0s.

>
>
> c)
> Has anyone tried http://wiki.xensource.com/xenwiki/XenWindowsGplPv with  
> a NetBSD dom0?

Last time I tried, all I could get was a blue screen.
I'll try again.

> d)
> For the developers: What's the status of SMP support for NetBSD/Xen  
> (nbsd dom0 smp and nbsd PV domU smp)? Would funding help the work  
> progress?

Provided there's someone willing to do the work

> Is there interest in actually having SMP support for netbsd  
> xen dom0/domU, in your personal opinion?

there is.

>
> If yes, what's preventing this from happening? (technical, human  
> resources, work is actually ongoing, etc)

human resources.

>
>
> e)
> For the developers: Any updates on  
> http://mail-index.netbsd.org/port-xen/2009/08/20/msg005280.html ?

AFAIK no.

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--