Cart (Loading....) | Create Account
Close category search window
 

A Simulation Study of the CRAY X-MP Memory System

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Cheung, T. ; International Marketing Group of the Hewlett-Packard ; Smith, J.E.

One of the significant differences between the CRAY X-MP and its predecessor, the CRAY-1S, is a considerably increased memory bandwidth for vector operations. Up to three vector streams in each of the two processors may be active simultaneously. These streams contend for memory banks as well as data paths. All memory conflicts are resolved dynamically by the memory system. This paper describes a simulation study of the CRAY X-MP interleaved memory system with attention focused on steady state performance for sequences of vector operations. Because it is more amenable to analysis, we first study the interaction of vector streams issued from a single processor. We identify the occurrence of linked conflicts, repeating sequences of conflicts between two or more vector streams that result in reduced steady state performance. Both worst case and average case performance measures are given. The discussion then turns to dual processor interactions. Finally, based on our simulations, possible modifications to the CRAY X-MP memory system are proposed and compared. These modifications are intended to eliminate or reduce the effects of linked conflicts.

Published in:

Computers, IEEE Transactions on  (Volume:C-35 ,  Issue: 7 )

Date of Publication:

July 1986

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.