Xen users - Jan 2010 - docs/reference for NUMA usage?

i''m reading up on numa usage.  so far, i''ve enabled numa on my
Xen
box. @ Dom0 i see,

 xm dmesg | grep -i numa
   (XEN) Command line: ... numa=on ...
   (XEN) No NUMA configuration found

i guess i need to ''configure'' numa.  i''ve no clue
how, and haven''t
found the docs for it yet, despite looking.

i found this old thread,

 http://lists.xensource.com/archives/html/xen-devel/2007-09/msg00374.html

which talks abt numa strategy in xen.

i''ve poked around in the wiki, but haven''t found additional
details.

are there any howto-docs for numa usage?

thanks.

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Hi,


I don''t think there is much in the way of configuration to do. Try
''xm
info'', you should see as many nodes as you have CPUs and the memory
mapping should line up, if it does then Numa is probably working
correctly.


Rob 

-----Original Message-----
From: xen-users-bounces@lists.xensource.com
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To: Xen User-List
Subject: [Xen-users] docs/reference for NUMA usage?

i''m reading up on numa usage.  so far, i''ve enabled numa on my
Xen
box. @ Dom0 i see,

 xm dmesg | grep -i numa
   (XEN) Command line: ... numa=on ...
   (XEN) No NUMA configuration found

i guess i need to ''configure'' numa.  i''ve no clue
how, and haven''t
found the docs for it yet, despite looking.

i found this old thread,

 
http://lists.xensource.com/archives/html/xen-devel/2007-09/msg00374.html

which talks abt numa strategy in xen.

i''ve poked around in the wiki, but haven''t found additional
details.

are there any howto-docs for numa usage?

thanks.

_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

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hi

On Sun, Jan 17, 2010 at 11:54 PM, Robert Dunkley <Robert@saq.co.uk>
wrote:
> I don''t think there is much in the way of configuration to do.
i admit to assuming that since it''s reporting that a configuration is
NOT found, that implies that one''s being looked for ...
> Try ''xm
> info'', you should see as many nodes as you have CPUs and the
memory
> mapping should line up, if it does then Numa is probably working
> correctly.
if that''s the metric, then

xm info
  ...
  nr_cpus                : 4
  nr_nodes               : 1
  ...
  total_memory           : 7935
  free_memory            : 6813
  max_free_memory        : 6813
  max_para_memory        : 6809
  max_hvm_memory         : 6785
  node_to_cpu            : node0:0-3
  node_to_memory         : node0:6813
  ...

as  nr_cpus != nr_nodes, there''s a problem?

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