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Characterizing the Caching and Synchronization Performance of a Multiprocessor Operating System by Josep Torrellas; Anoop Gupta; John Hennessy is a Computer Science article available to read on EtoBox.

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Good cache memory performance is essential to achieving high CPU utilization in shared-memory multiprocessors.While the performance of caches is determined by both application end operating system (OS ) references, most research has focused on the cache performance of applications afone. This is partiafly due to the difficulty of measuring OS activity and as a resrtl~the cache performance of the OS is largely unknown. In this paper, we characterize the cache performance of a commercial System V UNIX rtrttrtittg on a four-CPU multiprocessor.The related issue of the performance impact of the OS synchronization activity is tdso stttdicd. For our study, we use a hardware monitor that records the cache misses in the machine without perturbing it. We study three multiprocessor workloads: a parallel Compilq a multiprogrsmmed load and a commercial database. Our results show that OS misses occur frequently enough to stall CPUS for 17-21 'Yoof their non-idle time.Further, if we include application misses induced by OS interference in the cache, then the SQU time reaches 25%. A detailed analysis reveals three major sources of OS misses: instruction fetehea, process migratiom and data accesses

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Author

Josep Torrellas; Anoop Gupta; John Hennessy

Publisher

ACM

Published

1992

Language

EN

Field

Computer Science (Physical Sciences)