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Re: [Xen-users] Pinning cpu's still suggested practice?
- To: Steven Timm <timm@xxxxxxxx>
- From: Bruce Edge <bruce.edge@xxxxxxxxx>
- Date: Mon, 17 Jan 2011 20:24:40 -0800
- Cc: Nathan March <nathan@xxxxxx>, "xen-users@xxxxxxxxxxxxxxxxxxx List" <xen-users@xxxxxxxxxxxxxxxxxxx>
- Delivery-date: Mon, 17 Jan 2011 20:25:59 -0800
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On Mon, Jan 17, 2011 at 7:50 PM, Steven Timm <timm@xxxxxxxx> wrote:
A related question--it seems that the xen hypervisor kernel (as shipped with redhat) doesn't recognize
any NUMA structure that the machine may have. so if you pin, which
we do sometimes, how to ensure that you get memory bank closest to your cpu?
Steve
I think the NUMA structure is hidden from the VM as of xen 4.1. I don't understand this choice either. I'd much prefer to have the same level of control as on bare metal and older Xen versions.
-Bruce
On Mon, 17 Jan 2011, Nathan March wrote:
Back when we were first setting up our xen systems, it was recommended practice to pin the cpu's on your DomUs instead of allowing xen to manage them.
Is this still the suggested practice?
- Nathan
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Steven C. Timm, Ph.D (630) 840-8525
timm@xxxxxxxx http://home.fnal.gov/~timm/
Fermilab Computing Division, Scientific Computing Facilities,
Grid Facilities Department, FermiGrid Services Group, Group Leader.
Lead of FermiCloud project.
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