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Characterization of Multithreaded Scientific Workloads on Simultaneous Multithreading Intel Processors
 

Summary: Characterization of Multithreaded Scientific Workloads on
Simultaneous Multithreading Intel Processors
Ryan E. Grant Ahmad Afsahi
Department of Electrical and Computer Engineering
Queen's University
Kingston, ON, Canada K7L 3N6
9reg3@qlink.queensu.ca, ahmad.afsahi@queensu.ca
Abstract
Simultaneous Multithreading (SMT) is a technique that
allows multiple independent threads to execute different
instructions each cycle. Hyper-Threading (HT) is an
implementation of SMT available on recent processors
from Intel. Naturally, Multi-threaded applications are
very suitable for SMT systems. However, HT due to
extensive resource sharing may not suitably benefit
OpenMP high performance computing applications.
In this paper, we first present performance of different
OpenMP constructs on dual and quad HT-based Intel
Xeon servers under 2.4.22 and 2.6.9 kernels. We find that
the overhead of OpenMP constructs with HT is an order

  

Source: Afsahi, Ahmad - Department of Electrical and Computer Engineering, Queen's University (Kingston)

 

Collections: Computer Technologies and Information Sciences