NDLI: Simultaneous subordinate microthreading (SSMT)

Content Provider	ACM Digital Library
Author	Kim, Sangwook P. Stark, Jared Patt, Yale N. Chappell, Robert S. Reinhardt, Steven K.
Abstract	Current work in Simultaneous Multithreading provides little benefit to programs that aren't partitioned into threads. We propose Simultaneous Subordinate Microthreading (SSMT) to correct this by spawning subordinate threads that perform optimizations on behalf of the single primary thread. These threads, written in microcode, are issued and executed concurrently with the primary thread. They directly manipulate the microarchitecture to improve the primary thread's branch prediction accuracy, cache hit rate, and prefetch effectiveness. All contribute to the performance of the primary thread. This paper introduces SSMT and discusses its potential to increase performance. We illustrate its usefulness with an SSMT machine that executes subordinate microthreads to improve the branch prediction of the primary thread. We show simulation results for the SPECint95 benchmarks.
Starting Page	186
Ending Page	195
Page Count	10
File Format	PDF
ISSN	01635964
DOI	10.1145/307338.300995
Journal	ACM SIGARCH Computer Architecture News (CARN)
Volume Number	27
Issue Number	2
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1981-04-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article

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Simultaneous subordinate microthreading (SSMT)