SIFT - A preliminary evaluationThis paper presents the results of a performance evaluation of the SIFT computer system conducted in the NASA AIRLAB facility. The essential system functions are described and compared to both earlier design proposals and subsequent design improvements. The functions supporting fault tolerance are found to consume significant computing resources. With SIFT's specimen task load, scheduled at a 30-Hz rate, the executive tasks such as reconfiguration, clock synchronization and interactive consistency, require 55 percent of the available task slots. Other system overhead (e.g., voting and scheduling) use an average of 50 percent of each remaining task slot.
Document ID
19840027882
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Palumbo, D. L. (NASA Langley Research Center Hampton, VA, United States)
Butler, R. W. (NASA Langley Research Center Hampton, VA, United States)