multicore support for KVM machines

kawarmc

New Member
Jun 15, 2009
28
3
3
Hello guys:

First of all, you've done a fantastic job in 1.4 beta 1. Very impressive guys. Thank you very much.

Now, the problem. I've been trying to make Windows (in any of its variants and licenses) trying to use all of the processors and cores in my machines with no luck. That is, I have several machines with multi core and multi socket processors. As you may already know, Windows Server standard can use up to 4 processor sockets, independently of how many cores the processors has. The problem is that qemu+kvm in it most recent version can only pass to the virtual machine physical sockets. So, I need to upgrade my Widnows and install Data Center version (a lot to $$$$$$$). That's is not possible as you can guess. Qemu+kvm can pass up to 16 sockets to the vm but there is no way to tell them that those sockets have multicore processors.

I've found a git patch for qemu just for that specific configuration. I really, really, really need it. I need to migrate a machine running Win2k3 Standard to Proxmox next week and I need to have that patch applied so I can tell kvm to run qemu with 4 sockets and 4 cores per socket.

What could I do to apply that patch to qemu version in Proxmox 1.3?

By the way, you can find the patch on qemu-devel list: http://patchwork.kernel.org/patch/33961/
 
Hello guys:

First of all, you've done a fantastic job in 1.4 beta 1. Very impressive guys. Thank you very much.

Now, the problem. I've been trying to make Windows (in any of its variants and licenses) trying to use all of the processors and cores in my machines with no luck. That is, I have several machines with multi core and multi socket processors. As you may already know, Windows Server standard can use up to 4 processor sockets, independently of how many cores the processors has. The problem is that qemu+kvm in it most recent version can only pass to the virtual machine physical sockets. So, I need to upgrade my Widnows and install Data Center version (a lot to $$$$$$$). That's is not possible as you can guess. Qemu+kvm can pass up to 16 sockets to the vm but there is no way to tell them that those sockets have multicore processors.

I've found a git patch for qemu just for that specific configuration. I really, really, really need it. I need to migrate a machine running Win2k3 Standard to Proxmox next week and I need to have that patch applied so I can tell kvm to run qemu with 4 sockets and 4 cores per socket.

What could I do to apply that patch to qemu version in Proxmox 1.3?

By the way, you can find the patch on qemu-devel list: http://patchwork.kernel.org/patch/33961/

we do not plan to release a new version next week, but you can think of compiling it by yourself or pay somebody to do it for you - for example we can do this for you.
 
How much would that cost?

Will it be made oss and available to te hole comunity? (I guess so)
 
How much would that cost?

Will it be made oss and available to te hole comunity? (I guess so)

Pls discuss this directly with Martin (@proxmox.com), and yes, by default any improvement will be available as GPL for public.
 

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