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[Xen-users] Xen / NUMA problems

from [Kai Mosebach]

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Subject:	[Xen-users] Xen / NUMA problems
From:	Kai Mosebach <xen@xxxxxxxxxx>
Date:	Tue, 24 Jun 2008 15:03:45 +0200 (CEST)
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Hi folks,

we are using a Tyan TK8W 2885 Mainboard (latest BIOS) w/ 2 Dual Core Opteron 
280EE and 8GB of RAM (4GB per Socket). Furthermore we run CentOS 5.1 w/ Xen 
3.2.1.  (build from SRPM). We also tried 3.2.0.

I tried both, the CentOS 5.1 Xen Kernel as well as the latest RHEL 5.2 Kernel 
but we do not get two NUMA domains as we (in my opinion) are supposed to.

Do we need to recompile anything? If so how? and/or is it possible to force a 
NUMA mode?

Thanks a lot

Kai

# xm list
...
release                : 2.6.18-92.1.1.el5xen
machine                : x86_64
nr_cpus                : 4
nr_nodes               : 1
cores_per_socket       : 2
threads_per_core       : 1
total_memory           : 8063
free_memory            : 128
node_to_cpu            : node0:0-3
xen_major              : 3
xen_minor              : 2
xen_extra              : .1
xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p
xen_scheduler          : credit
xen_pagesize           : 4096
xen_changeset          : unavailable
xend_config_format     : 4

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