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

[Luke S Crawford <lsc@xxxxxxxxx>]

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.






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