A Performance Evaluation of the Convex SPP-1000 Scalable Shared Memory Parallel Computer

The Convex SPP-1000 is the first commercial implementation of a new generation of scalable shared memory parallel computers with full cache coherence. It employs a hierarchical structure of processing communication and memory name-space management resources to provide a scalable NUMA environment. Ensembles of 8 HP PA-RISC7100 microprocessorsemploy an internal cross-bar switch and directorybased cache coherence scheme to provide a tightly coupled SMP. Up to 16 processing ensembles are interconnected by a 4 ring network incorporating a full hardware implementation of the SCI protocol for a full system configuration of 128 processors. This paper presents the findings of a set of empirical studies using both synthetic test codes and full applications for the Earth and space sciences to characterize the performance properties of this new architecture. It is shown that overhead and latencies of global primitive mechanisms, while low in absolute time, are significantly more costly than s...

• Type: Conference
• Year: 1995
• Where: SC
• Authors: Thomas L. Sterling, Daniel Savarese, Peter MacNeice, Kevin Olson, Clark Mobarry, Bruce Fryxell, Phillip Merkey
• Keywords: Applied Computing, Cache Coherence, Cache Coherence Scheme, SC 1995, Scalable Shared Memory