[Xen-devel] NUMA problem with AMD G34 system

[marcotte@xxxxxxxxx (Brian Marcotte)]

I'm having a problem with NUMA on an AMD G34 system. Xen seems to think
that out of the 16 total cores, there are 12 on node0 and 4 on node3.

The box is:

    SuperMicro H8DGU (dual socket G34)
    Pair of AMD 6128 CPUs (8 core each)
    32 GB of RAM.
    BIOS has been upgraded three times - no help.

    xen-unstable from Feb 12 (same problem on 3.4.x).

I'm including the output from the "u" command below to show Xen's idea
of the CPU->node mapping. Complete boot log is here:

    http://www.panix.com/~marcotte/g34/boot.txt

Any help would be appreciated.

Thanks.

- Brian

(XEN) Xen version 4.1.0-rc5-pre (root@xxxxxxxxxxxxxx) (gcc version 4.3.2 
(Debian 4.3.2-1.1) ) Sat Feb 12 18:53:49 EST 2011
(XEN) Command line: dom0_mem=600M com1=57600,8n1 console=com1 no-mce 
loglvl=debug

(XEN) 'u' pressed -> dumping numa info (now-0x2:5A61B881)
(XEN) idx0 -> NODE0 start->0 size->4325376
(XEN) phys_to_nid(0000000000001000) -> 0 should be 0
(XEN) idx3 -> NODE3 start->4325376 size->4194304
(XEN) phys_to_nid(0000000420001000) -> 3 should be 3
(XEN) CPU0 -> NODE0
(XEN) CPU1 -> NODE0
(XEN) CPU2 -> NODE0
(XEN) CPU3 -> NODE0
(XEN) CPU4 -> NODE0
(XEN) CPU5 -> NODE0
(XEN) CPU6 -> NODE0
(XEN) CPU7 -> NODE0
(XEN) CPU8 -> NODE3
(XEN) CPU9 -> NODE3
(XEN) CPU10 -> NODE3
(XEN) CPU11 -> NODE3
(XEN) CPU12 -> NODE0
(XEN) CPU13 -> NODE0
(XEN) CPU14 -> NODE0
(XEN) CPU15 -> NODE0
(XEN) Memory location of each domain:
(XEN) Domain 0 (total: 153600):
(XEN)     Node 0: 132232
(XEN)     Node 3: 21368

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