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Subject: Re: [hwloc-devel] hwloc powerpc rhel5 and power7 patch
From: Alexey Kardashevskiy (aik_at_[hidden])
Date: 2010-09-16 01:42:27

Please find the answers below.

On 16/09/10 15:29, Samuel Thibault wrote:
> Alexey Kardashevskiy, le Thu 16 Sep 2010 14:10:08 +1000, a écrit :
>> 1. Old kernels (RHEL5.*) do expose some numa nodes via sysfs but there
>> is no information regarting cache (L1/L2/L3) and CPU threads. RHEL6 does
>> that. The proposed patch parses PowerPC's /proc/device-tree and add
>> necessary information into the topology.
> Mmm, is that information not available on RHEL6 through the standard
> /sys/devices/system/cpu/cpu*/cache too?

It is available on RHEL6 and not available on RHEL5. So the patched code
looks to sysfs first and if there were no cache info found, goes to the
device-tree. Workaround, yes.

> Could you post a tgz output example of tests/linux/ on
> RHEL6 so we can include a testcase for your code?

Attached, both files.