Comparing the Scalability of the Cray T3E-600 and the Cray Origin 2000 Using SHMEM Routines
Glenn R. Luecke, Bruno Raffin, Bruno Ran, James J. Coyle · 1998
This paper presents relative scalability results for the Cray T3E-600 and the Cray Origin 2000 on five communication tests for a variety of message sizes and for 4, 8, 12, ..., 128 processors. The five communication tests were chosen to represent commonlyused communication patterns with low contention (accessing distant messages, a right shift and a binary tree broadcast) to communication patterns with high contention (a "basic" broadcast and an all-to-all). Both machines scaled roughly the same on all tests except the right shift with short messages where the T3E scaled significantly better than the Origin. However, it should be noted that the T3E outperformed the Origin 2000 for most of these tests. Keywords: Cray T3E-600; Cray Origin 2000; Relative scalability; Performance evaluation using SHMEM library. 1 Introduction The ability of a parallel computer to efficiently use large numbers of processors is an important performance criterion. Such a computer is often called "scalable". ...