[Xen-users] Re: [Xen-devel] What's the different for "dom0_max_vcpus=4 dom0_vcpus_pin" and "dom0_max_vcpus=4" ?

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 21/05/2010 16:39, "lei yang" <yanglei.fage@xxxxxxxxx> wrote:

>> The former restricts Xen to only run Dom0 VCPUs 0-3 on physical CPUs 0-3.
>  
> dom0_max_vcpus=4 dom0_vcpus_pin will just to core0-3? can it be 3 4 5 6?
> if remove "dom0_vcpus_pin" just use "  dom0_max_vcpus=4 " can it be 3 4 5 6 ?

No, but you can set whatever affinity you like after dom0 has booted. For
example, to pin Dom0 VCPUs 0-3 to CPUs 3-6 respectively:
xl vcpu-pin 0 0 3
xl vcpu-pin 0 1 4
xl vcpu-pin 0 2 5
xl vcpu-pin 0 3 6
(or use xm vcpu-pin if you are not using the new xl command).

 -- Keir



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