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Summary: The Energy Efficiency of CMP vs. SMT for
Multimedia Workloads
Ruchira Sasanka Sarita V. Adve
Department of Computer Science
University of Illinois at Urbana-Champaign
{sasanka, sadve}@cs.uiuc.edu
Yen-Kuang Chen Eric Debes
Architecture Research Lab
Intel Corporation
{yen-kuang.chen, eric.debes}@intel.com
Abstract
This paper compares the energy efficiency of chip multipro-
cessing (CMP) and simultaneous multithreading (SMT) on modern
out-of-order processors for the increasingly important multimedia
applications. Since performance is an important metric for real-
time multimedia applications, we compare configurations at equal
performance. We perform this comparison for a large number of
performance points derived using different processor architectures
and frequencies/voltages.
We find that for the design space explored, for each workload,
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