Migrating from Cray Y-MP to Cray T90 and T3E

Lachesis: A Job Scheduler for the Cray T3E

This paper presents the design and implementation of Lach-esis, a job scheduler for the Cray T3E. Lachesis was developed at the San Diego Supercomputer Center (SDSC) in an attempt to correct some problems with the scheduling system Cray provides with the T3E.

Priority Queues and Sorting Methods for Parallel Simulation

We examine the design, implementation, and experimental analysis of parallel priority queues for device and network simulation. We consider: a) distributed splay trees using MPI, b) concurrent heaps using shared memory atomic locks, and c) a new, more general concurrent data structure based on distributed sorted lists, which is designed to provide dynamically balanced work allocation (with auto...

Empirical Evaluation of Global Memory Support on the CRAY-T3D and CRAY-T3E

The CRAY T3E System

Pioneers began using scalable computing systems over 10 years ago. Slowly the potential audience for scalable systems has grown as programming methods and systems have matured. The CRAY T3D system enabled production users to use scalable systems. Now, the CRAY T3E system is pushing beyond the CRAY T3D base by delivering the most advanced scalable technology at lower price points, and to users o...

Network Simulation on Cray-T3E using MPI

We propose a novel approach for parallel discrete-event network simulation on packet-switched, point-to-point networks. Our algorithm resolves packet connicts through priority sorting of appropriate integer connict functions. We implement our method on CM-5, Cray-T3D, and Cray-T3E systems using C and MPI, and perform critical optimizations aimed at reducing sorting overhead, minimizing inter-pr...