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Subject: Re: [hwloc-devel] hwloc-1.3.1 and 1.4 failures on MIPS64/qemu
From: Paul H. Hargrove (PHHargrove_at_[hidden])
Date: 2012-02-01 14:18:20

On 2/1/2012 9:13 AM, Samuel Thibault wrote:
> Paul H. Hargrove, le Wed 01 Feb 2012 05:58:05 +0100, a écrit :
>> At the moment my suspicion falls on the compiler, as I can't see how a
>> failure of 256ia64-64n2s2c.output could be h/w dependent.
> It could be a problem of imperfect qemu emulation.
> Samuel

If I understand correctly, the failing test just processes synthetic
data (for a 64-node X 2-socket X 2-core cluster of ia64 cpus).
So if qemu's emulation were at fault, then one would expect more
wide-spread problems and a generally unstable system.
While -mabi=64 is not the default in user-space, it IS the way the linux
kernel is built and thus should be well tested.


Paul H. Hargrove                          PHHargrove_at_[hidden]
Future Technologies Group
HPC Research Department                   Tel: +1-510-495-2352
Lawrence Berkeley National Laboratory     Fax: +1-510-486-6900