Re: [Xen-users] xen cpu affinity, ie; pinning cpus

[Brian Krusic <brian@xxxxxxxxxx>]

On Oct 23, 2009, at 8:05 PM, Luke S Crawford wrote:

> Brian Krusic <brian@xxxxxxxxxx> writes:
>
> > Heres my grub.conf;
> >
> > kernel /boot/xen.gz-3.4.1 dom0_max_vcpus=1 dom0_mem=1024M
> >
> > xend-config.sxp;
> >
> > (dom0-cpus 1)
> >
> > Heres my xm vcpu-list after a reboot of the system;
> >
> > Name            ID      VCPU    CPU     State   Time(s)         CPU Affinity
> > Domain-0        0       0               0               r--             216.6   
> >         any cpu
> >
> >
> > Heres my xm vcpu-list after xm vcpu-pin;
> >
> > Name            ID      VCPU    CPU     State   Time(s)         CPU Affinity
> > Domain-0        0       0               0               r--             12585.6 
> >         0
> >
> > I tired to format this nice for you so please excuse if it come out
> > like crap.
> >
> > Notice the the CPU Affinity column.
> here is my kernel: line
>
> kernel /boot/xen.gz dom0_mem=1024M dom0_max_vcpus=1  
> dom0_vcpus_pin=true console=com1 com1=115200,8n1
>
> note the dom0_vcpus_pin=true    - that's the key bit;  it means pin
> vcpu0 to cpu0, vcpu1 to cpu1, etc...   once you have that, the
> dom0_max_vcpus setting isn't so important, you can just set  
> dom0_cpus or
> what have you in xend-config.sxp.
Yep, that did it.

Many many thanks Luke.

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