%T Using Two\-, Four\- and Eight\-Way Multiprocessors as Cluster Components
%A Brian Vinter, Otto J. Anshus, Tore Larsen, John Markus Bjørndalen
%E Alan G. Chalmers, Majid Mirmehdi, Henk Muller
%B Communicating Process Architectures 2001
%X This work considers the pros and cons of different size SMPs
as nodes in clusters. We investigate the Intel SMP
architecture and consider the potential of and some problems
with larger node\-sizes in clusters of multiprocessors. Six
applications that represent different classes of parallel
applications are developed in versions that support both
shared and distributed memory. Performance measurements are
done on three different clusters of multiprocessors, with
the purpose of identifying how the number of processors in
each SMP node impacts the cluster performance. Our results
show that clusters using higher order SMPs do not give a
clear performance benefit compared to clusters using
two\-way SMPs. Off the bench mark\-suite of six
applications, the performance of two turn out to be
independent of node\-size, two show an advantage of larger
node\-sizes, as much as 34 percent improvement of eight\-way
nodes over a dual\-system, while the remaining two show an
advantage of dual\-processor nodes as big as 11 percent over
an eight\-way cluster.
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