EM2: A Scalable Shared-Memory Multicore Architecture
Name
MIT-CSAIL-TR-2010-030.pdf
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848.84 KB
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Adobe PDF
Checksum (MD5)
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Author(s)
Khan, Omer
Lis, Mieszko
Devadas, Srini
Advisor(s)
Srini Devadas
Date Issued
June 12, 2010
Series/Report no.
MIT-CSAIL-TR-2010-030
Abstract
We introduce the Execution Migration Machine (EM2), a novel, scalable shared-memory architecture for large-scale multicores constrained by off-chip memory bandwidth. EM2 reduces cache miss rates, and consequently off-chip memory usage, by permitting only one copy of data to be stored anywhere in the system: when a thread wishes to access an address not locally cached on the core it is executing on, it migrates to the appropriate core and continues execution. Using detailed simulations of a range of 256-core configurations on the SPLASH-2 benchmark suite, we show that EM2 improves application completion times by 18% on the average while remaining competitive with traditional architectures in silicon area.
Subjects
parallel processing
parallel architecture
distributed memory
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