May 2008

Conference Paper

The Cray XT4 Quad-core : A First Look

By:
Alam, Sadaf R; Barrett, Richard ; Eisenbach, Markus ; Fahey, Mark R; Hartman-Baker, Rebecca J; Kuehn, Jeffery A; Poole, Stephen W; Sankaran, Ramanan ; Worley, Patrick H
Publication Date:
May 2008
Conference Name:
Cray User Group (CUG) 2008
Conference Location:
Helsinki, Finland

Abstract

The Cray XT4 at Oak Ridge National Laboratory (ORNL), named Jaguar, has recently been up- graded, from dual-core to quad-core processors in addition to other significant changes. Although we have had very limited access to the machine and therefore are not presenting definitive performance results, we can share some meaningful and constructive experiences to the user community which could be of assistance as they gain access to Jaguar as well as other multi-core processor based parallel com- puters. These experiences were gained while porting a broad set of scientific application programs to Jaguar.