[ODE] ODE slow on itanium?
jsinecky at tiscali.cz
Mon Dec 4 01:04:08 MST 2006
Maybe some differences in CPU cache size or RAM access speed? I remember
we did some tests like this in the past where one machine with
comparable CPU was considerably slower and we concluded it was mainly
because of memory working on lower frequency.
I'm not really a hardware expert, so if I'm saying nonsenses, someone
please jump in.
Bill Sellers wrote:
> Hi All,
> I've just been doing some benchmarking of my simulation on various
> processors and they all behave about as I expect except for a truly
> dreadful showing on a recent 1.6GHz Itanium system. It's over 3 times
> slower than an Opteron 252 which is hardly cutting edge anymore, and
> over twice as slow as the Xeon 5160 in my MacPro. They are all
> compiled with gcc using the standard "-O3 -ffastmath" options. Anyone
> got any idea what's wrong since I don't think the Itanium should be
> this slow...
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> ODE at q12.org
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