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An Introduction to Parallel Programming
An Introduction to Parallel Programming
Tobias Wittwer
VSSD
© Tobias Wittwer
First edition 2006
Published by:
VSSD
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ISBN-10 90-71301-78-8
ISBN-13 978-90-71301-78-0
NUR 958
Keywords: parallel programming
Foreword
puter user knows the craving for puting power. It was this “need for speed”
that made me choose high putingassubject of my master thesis. This gave me
the opportunity to work with systems at Stuttgart’shigh puting center, HLRS.
Ispent five months parallelising programs for gravity field modelling using OpenMP and MPI,
and testing them on a Cray Opteron cluster, NEC TX-7, and NEC SX-6.
After graduating I moved to herlands formyPhDresearch in the Physical and Space
Geodesy Group of the Delft Institute of Earth Observation and Space System, at the faculty of
Aerospace Engineering of the Delft University of Technology. My research topic, regional grav-
ity field modelling, proved to putationally intensive. Luckily, we had access to Teras and
Aster, two puters at the SARA puting facility in Amsterdam. My programs
were quickly parallelised, shortening program runs from hours to minutes.
Seeing my colleagues struggle with the limited power of their PCs gave me the idea of writing a
tutorial about parallel programming, to give everyone the opportunity to easily parallelise her or
his programs. More urge was added when our group decided to buy its own Linux
all I needed