UTCS Colloquium/Architecture: Mike Kistler/IBM Austin Research Laboratory: "Petescale Computing with Accelerators" ACES 2.302, Monday, April 27, 2009 3:30 p.m.
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Type of T
alk: UTCS Colloquium/Architecture
Mike Kistler/IBM Austin Research Laboratory
, April 27, 2009 3:30 p.m.
Location: ACES 2.302
bsp; Steve Keckler
Talk Title: "Petascale Computing wit
A trend is developing in hi
gh performance computing in which commodity processors are coupled to vario
us types of computational accelerators. Such systems are commonly ca
lled hybrid systems. In this talk, I will describe our experience developi
ng an implementation of the Linpack benchmark for a petascale hybrid system
, the LANL Roadrunner cluster built by IBM for Los Alamos National Laborat
ory. This system combines traditional x86-64 host processors with IB
M PowerXCell 8i accelerator processors. The implementation of Linp
ack we developed was the first to achieve a performance result in excess of
1.0 PFLOPS, and made Roadrunner the #1 system on the Top500 list in June
2008. I will describe the design and implementation of hybrid Linpack, inc
luding the special optimizations we developed for this hybrid architecture.
I will show actual results for single node and multi-node execution
s. From this work, we conclude that it is possible to achieve high perform
ance for certain applications on hybrid architectures when careful attentio
n is given to efficient use of memory bandwidth, scheduling of data moveme
nt between the host and accelerator memories, and proper distribution of w
ork between the host and accelerator processors.
Mike Kistler is a Senior Technical Staff Member in the IBM Austin Resear
ch Laboratory. He received his BA in Math and Computer Science from Susqueh
anna University in 1982, an MS in Computer Science from Syracuse Universit
y in 1990, and MBA from Stern School of Business (NYU) in 1991. He joined
IBM in 1982 and has held technical and management positions in MVS, OS/2,
and Lotus Notes development. He joined the IBM Austin Research Laboratory
in May 2000 and is currently working on design and performance analysis for
IBM''s PowerPC and Cell/B.E. processors and systems. His research interest
s are parallel and cluster computing, fault tolerance, and full system si
mulation of high-performance computing systems.
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