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05-18-2010 05:07 AM
05-18-2010 05:07 AM
NUMA support for RedHat5.3 Nehalem CPU's?
NUMA support is not enabled in kernel by default in RedHat5.3. (HW is HP Blade 460c G6 w/. two Xeon X5570 CPU’s and 24 (6x4) GB memory, kernel is 2.6.18PAE) . By recompiling kernel on with NUMA support and rebooting with new kernel, there is still one node is visible with numactl --hardware, and in dmesg logs I have an error:
kernel: get_memcfg_from_srat: assigning address to rsdp
kernel: RSD PTR v2 [HP ]
ACPI: Too big length in RSDT: 104
failed to get NUMA memory information from SRAT table
kernel: NUMA - single node, flat memory mode
RedHat knowledge base referring only to RedHat 4 for NUMA Nehalem support.
Does anyone have a clue how to enable NUMA support for RedHat 5.3?
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05-18-2010 05:49 AM
05-18-2010 05:49 AM
Re: NUMA support for RedHat5.3 Nehalem CPU's?
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05-18-2010 06:05 AM
05-18-2010 06:05 AM
Re: NUMA support for RedHat5.3 Nehalem CPU's?
I would appreaciate a specific instruction of how to properly enable NUMA support. It seems there is no document about it for 5x release.
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05-18-2010 09:43 AM
05-18-2010 09:43 AM
Re: NUMA support for RedHat5.3 Nehalem CPU's?
Documentation.
Not sure its right, but it is worth a look.
It doesn't look promising to me actually being able to do this.
http://www.redhat.com/docs/manuals/enterprise/RHEL-5-manual/release-notes/RELEASE-NOTES-x86-en.html
The hypervisor included in this release of Virtualization is not NUMA-aware; as such, its performance on NUMA machines may be sub-optimal. This will be addressed in a future update of Red Hat Enterprise Linux 5.
Might want to see if this 4.x procedure works on 5.x
http://kbase.redhat.com/faq/docs/DOC-17685
This doc says it works:
http://www.mail-archive.com/libvir-list@redhat.com/msg10579.html
http://www.centos.org/docs/5/html/Installation_Guide-en-US/ch-bootopts-x86.html
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06-08-2010 11:28 PM
06-08-2010 11:28 PM