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Symbiotic Jobscheduling for a Simultaneous Multithreading Processor (2000)
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| Venue: | In Eighth International Conference on Architectural Support for Programming Languages and Operating Systems |
| Citations: | 346 - 15 self |
BibTeX
@INPROCEEDINGS{Snavely00symbioticjobscheduling,
author = {Allan Snavely and Dean Tullsen},
title = {Symbiotic Jobscheduling for a Simultaneous Multithreading Processor},
booktitle = {In Eighth International Conference on Architectural Support for Programming Languages and Operating Systems},
year = {2000},
pages = {234--244}
}
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Abstract
Simultaneous Multithreading machines fetch and execute instructions from multiple instruction streams to increase system utilization and speedup the execution of jobs. When there are more jobs in the system than there is hardware to support simultaneous execution, the operating system scheduler must choose the set of jobs to coschedule This paper demonstrates that performance on a hardware multithreaded processor is sensitive to the set of jobs that are coscheduled by the operating system jobscheduler. Thus, the full benefits of SMT hardware can only be achieved if the scheduler is aware of thread interactions. Here, a mechanism is presented that allows the scheduler to significantly raise the performance of SMT architectures. This is done without any advance knowledge of a workload's characteristics, using sampling to identify jobs which run well together.
Keyphrases
simultaneous multithreading processor symbiotic jobscheduling smt architecture full benefit multiple instruction stream advance knowledge smt hardware execute instruction operating system scheduler simultaneous multithreading machine fetch simultaneous execution operating system jobscheduler thread interaction
