Messages in this thread | | | Date | Tue, 18 Sep 2012 14:55:43 +0800 | Subject | Re: 2 physical-cpu (like 2x6core) config and NUMA? | From | Jike Song <> |
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On Tue, Sep 18, 2012 at 2:00 AM, Linda Walsh <lkml@tlinx.org> wrote: > Does the kernel support scheduling based on the different speed of > memory between "on die" vs. "off die"? I was surprised to see > that it viewed my system as 1 NUMA node with all 12 on 1 node -- when > I know that it is physically organized as 2x6. > Do I have to configure that manually or did I maybe turn off something > in my kernel config I should have turned on?
Do you have anything printed with:
# acpidump -a --table SRAT
?
I have a Dell box with 2 physical CPUs, each of them has 6 cores. If I enable "Node Interleaving" in BIOS' Memory Setting, and boot the kernel, the SRAT table will be invisible to Linux - results the same topology as you got. If I disable "Node Interleaving" and boot the kernel, SRAT is present, and the topology is correct.
Hope that helps.
-- Thanks, Jike
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