for those in cambridge, ma or surroundings.
--
Stefano.
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End-to-End Performance Optimization of Java Server Workloads
Speaker: Jong-Deok Choi
Speaker Affiliation: IBM T. J. Watson Research Center
Host: Martin Rinard
Host Affiliation: CSAIL
Date: 10-26-2005
Time: 2:00 PM - 3:00 PM
Refreshments: 1:45 PM
Location: 32-D463 Star
The size and complexity of large-scale commercial middleware systems, such as
J2EE, and their workloads makes it difficult to understand and optimize the
performance of such systems. A J2EE middleware with its application may have
tens of thousands of methods, hundreds of concurrently executing threads, and
runtime stacks that are hundreds of methods deep. While acting like an
operating system for its applications and providing various runtime services,
J2EE runs on a Java Virtual Machine (JVM) as an application mostly written in
Java. The JVM itself provides its own various runtime services, such as
synchronization and garbage collection, and in turn relies on the underlying
operating system for OS services such as threading and memory management. This
complicated interaction among the various layers of the software (and hardware)
stack is a major source of the challenge to understanding and optimizing the
performance of such large-scale middleware systems and their applicat
ions.
In this talk, I will first present a brief description of the whole-stack,
end-to-end analysis and optimization system we have developed at IBM T. J.
Watson Research Center for Websphere Application Server (WAS), which is IBM's
implementation of the J2EE. After that, I will present runtime data and their
analysis results from the various layers of the SW and HW stack running WAS and
its key benchmark programs, and compare them with those of SPECjbb, a Java
benchmark program widely used by Java performance researchers. I will also
present a few of the performance bottlenecks we have found, and their
optimization.
Bio:
Jong-Deok Choi is a Research Staff Member (RSM) and Manager of the High
Performance Programming group at the IBM T. J. Watson Research Center in
Yorktown Heights, New York. He is a project co-leader of the End-to-End Server
Optimization project, a cross-organizational effort in IBM for improving the
performance of commercial eServer applications on IBM's server platforms. Since
joining Watson Research in 1989, he has been involved in various research and
development projects - in the areas of program analysis, optimization, and
debugging - such as PTRAN, TPO, Jalapeno, DejaVu, JikesRVM, and End-to-End
Optimization. His research interests include static and dynamic analysis and
optimization of commercial and scientific applications, middleware analysis and
optimization, high performance computer architecture, and debugging
multithreaded and distributed applications.
He received B.S. in Electronic Engineering from SNU, Korea in 1979, M.S. in
Electrical Engineering from KAIST, Korea in 1981, and M.S. and Ph.D. both in
Computer Sciences from Univ. of Wisconsin-Madison in 1985 and 1989,
respectively.
Relevant URL(S):
For more information please contact: Mary McDavitt, 617-253-9620, [EMAIL
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