Professor Hitoshi Oi, from University of Aizu, Japan is visiting this week

11 February 2013

Title:  Power-Performance Efficiency Study of SPECjEnterprise2010


Power management problem first attracted the interests of portable
device designers;
less power consumption means a longer battery life.  Nowadays, it is
also a significant
and 'hot' topic for large scale server systems (or data centers).
First, it is due to
the ever increasing energy cost. The higher the CPU clock,
the more power it dissipates and paying more electric bills. This
higher power dissipation
not only means more energy cost for computers, but also means the cost
for cooling the system.
Moreover, the heat from the computer systems limit the density of the machines
in the data center.

In this talk, the speaker will  present the results from a case study
of the power consumption  and performance trade-offs in Java
application servers.
We use an industry-standard benchmark for the Java application servers,
SPECjEnterprise2010, on two platforms with different CPUs, AMD
Phenom~II  and Intel Atom,

We investigated the performance and power consumption behaviors
against the increasing system size and the relative performance
between Phenom vs Atom. Phenom is capable of dynamic frequency
scaling (DFS) and  we studied the effects of clock frequency control
parameters on the performance and power consumption.

In this talk, the speaker will also present a brief introduction to
the University of Aizu.   Aizu and Porto have an agreement of student exchange
program, and have sent an exchange student from both side in the past
few years.

Speaker's Bio:

Hitoshi Oi is an assistant professor in Computer Software Department
at the University of Aizu, Japan.  He received PhD degree
in Computer Science and Engineering from University of South Florida.
He also received BE and ME degrees from Meiji University, Japan.
He worked for the industry as a computer architect (HAL Computer
Systems) and as an LSI design engineer (Digital Equipment Corporation).
His research interests include computer architecture, workload
analysis and performance evaluation, LSI design and verification.