Messages in this thread | | | Date | Tue, 2 Feb 2010 08:07:51 +0100 | From | Borislav Petkov <> | Subject | Re: nr_cpu_ids incorrect on AMD Quad-Core Opteron 8380 |
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On Tue, Feb 02, 2010 at 01:49:06PM +1300, zhiyi wrote: > The dmesg relevant to nr_cpu_ids of the quad socket is: > > [ 0.000000] NR_CPUS:64 nr_cpumask_bits:64 nr_cpu_ids:32 nr_node_ids:4 >
No, this is not the relevant info. I was actually looking for the MADT ACPI table and whether there are disabled entries like so:
[ 0.000000] ACPI: LAPIC (acpi-id[0x03] lapic-id[0x02] enabled) [ 0.000000] ACPI: LAPIC (acpi-id[0x04] lapic-id[0x03] enabled) [ 0.000000] ACPI: LAPIC (acpi-id[0x05] lapic-id[0x84] disabled) [ 0.000000] ACPI: LAPIC (acpi-id[0x06] lapic-id[0x85] disabled)
because if there are, nr_cpu_ids will include those when you don't boot with "possible_cpus=N".
Anyhow, you can read this for more info: http://www.pubbs.net/kernel/200912/64310/
-- Regards/Gruss, Boris.
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