Re: port-xen/42441: DOM0 and DOMU work with only one cpu

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

On Fri, Dec 11, 2009 at 09:50:00AM +0000, 
petea_garstea%fincombank.com@localhost wrote:
> DOM-0:
> NetBSD NetBSD 5.0.1 NetBSD 5.0.1 (XEN3_DOM0) #0: Thu Dec  3 17:56:47 EET 2009 
>  peter@NetBSD:/usr/src/sys/arch/i386/compile/XEN3_DOM0 i386
> 
> DOMU
> NetBSD  5.0.1 NetBSD 5.0.1 (XEN3_DOMU) #0: Tue Dec  8 21:21:30 EET 2009  
> peter@NetBSD:/usr/objdir/sys/arch/i386/compile/XEN3_DOMU i386
> >Description:
> hello!
> i updated the system and install the:
> xentools3-3.1.4nb4
> xenkernel3-3.1.4nb3
> 
> i have the system with 4 cpu and configured DOM0 to use only one cpu
> (dom0-cpus 1) - in xend config file, and DOMU with the 1,2,3 cpus, it doesnt 
> work, then i tried to do it manualy with the following commands:
> 
> DOM0:
> xm vcpu-set 0 1
> xm vcpu-pin 0 0 0
> 
> DOMU:
> xm vcpu-set 2 3
> xm vcpu-pin 2 0 1
> xm vcpu-pin 2 1 2
> xm vcpu-pin 2 2 3
> 
> xm vcpu-list
> Name                                ID  VCPU   CPU State   Time(s) CPU 
> Affinity
> Domain-0                             0     0     0   r--     741.2 0
> Domain-0                             0     1     -   --p       0.0 0
> Domain-0                             0     2     -   --p       0.0 0
> Domain-0                             0     3     -   --p       0.0 0
> NetBSD-STABLE-DOMU                   2     0     1   -b-      12.4 1
> NetBSD-STABLE-DOMU                   2     1     -   --p       0.0 2
> NetBSD-STABLE-DOMU                   2     2     -   --p       0.0 3
> 
> So i see that dom0 has 4 vcpu but i gave to it only one vcpu, The domu has 
> been created with the 3 vcpu and useses cpu 1,2,3 but second and third vcpu 
> have pause state that means domu doesnt use it
> 
> xm list
> Name                                        ID   Mem VCPUs      State   
> Time(s)
> Domain-0                                     0   256     1     r-----    744.0
> NetBSD-STABLE-DOMU                           2   512     1     -b----     14.2
> 
> My conclusion is:
> Im doing something wrong
> or the hyperviosion is not working correctly. 

NetBSD/Xen doesn't support SMP yet at the domains level (SMP will be used by
the hypervisor to schedule different domains to different CPUs)

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