"Last fall, I had an opportunity to test the new quad-core Intel
Xeon 5400 processor (Harpertown) processor. As the Harpertown was
in short supply, I only had two nodes (two sockets on each node for
total of 16 cores) with which to run my tests. I'm not picky,
however, I like to run HPC tests as this type of data is absent in
the mainstream press. In particular, I am most interested in how
multi-core and MPI play in the HPC space. There is plenty to
discuss, but for some interesting benchmark numbers, read on.
"The hardware was provided by Appro as part a white paper I was
writing for SC07 (SuperComputing 2007). After some delays, like
converting my temporary basement office to a real office with
walls, I have finally managed to publish some of the more
interesting finding from my tests. But first. a little background
may be useful..."