[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Supported #of CPUs/VMs per CPUs
On 18/9/06 13:17, "Daniel P. Berrange" <berrange@xxxxxxxxxx> wrote: >> >> Xen supports up to 32 CPUs on a 32-bit system, or 64 CPUs (by default) on a >> 64-bit system. Guests can have up to 32 virtual CPUs. The only limit to >> number of domains is amount of hardware resource (mainly memory) that you >> have to share. > > Are these hard limits, or just the kernel config defaults for Xen kernels ? > Any reason the guest VCPU count is limited to less than the physical number > on x86_64 ? (not that I expect much demand for 64 CPU guests) All are hard limits except number of supported CPUs on x86/64 (which is a compile-time option). Number of VCPUs per guest is limited by space in the shared_info page shared between each guest and Xen. This limitation will go away in due course but right now we have scalability at 4-8 VCPUs so in practise a hard limit of 16 is not the main issue. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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