Ancient, yes, but [unfortunately?] still highly relevant as far as commercial linux clusters go...
From: hwloc-users-bounces_at_[hidden] [mailto:hwloc-users-bounces_at_[hidden]] On Behalf Of Jeff Squyres
Sent: Thursday, January 28, 2010 11:42 AM
To: Hardware locality user list
Subject: Re: [hwloc-users] No caches or hiearchy on RHEL 4.7 or 4.8
I know that the RHEL 4 kernels are 2.6.9 -- they're really ancient. Most of the topology stuff didn't come into the kernel until 2.6.15 or so.
On Jan 28, 2010, at 1:40 PM, Brice Goglin wrote:
> Dan Eaton wrote:
>> Yes, the cpuid version works marvelously. The only thing it misses is memory/NUMA node (is it using libnuma?).
> libnuma reads numa info exactly like hwloc does: from sysfs, i.e. it
> depends of the kernel. I don't know if we could try to read SRAT tables
> from userspace when the kernel exports wrong NUMA info...
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