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2013 IEEE International Symposium on Performance Analysis of Systems and Software (ISPASS) (2013)
Austin, TX, USA USA
Apr. 21, 2013 to Apr. 23, 2013
ISBN: 978-1-4673-5776-0
pp: 74-85
Jung Ho Ahn , Seoul National University, Korea
Sheng Li , Hewlett-Packard Labs, USA
Seongil O , Seoul National University, Korea
Norman P. Jouppi , Hewlett-Packard Labs, USA
ABSTRACT
With their significant performance and energy advantages, emerging manycore processors have also brought new challenges to the architecture research community. Manycore processors are highly integrated complex system-on-chips with complicated core and uncore subsystems. The core subsystems can consist of a large number of traditional and asymmetric cores. The uncore subsystems have also become unprecedentedly powerful and complex with deeper cache hierarchies, advanced on-chip interconnects, and high-performance memory controllers. In order to conduct research for emerging manycore processor systems, a microarchitecture-level and cycle-level manycore simulation infrastructure is needed. This paper introduces McSimA+, a new timing simulation infrastructure, to meet these needs. McSimA+ models x86-based asymmetric manycore microarchitectures in detail for both core and uncore subsystems, including a full spectrum of asymmetric cores from single-threaded to multithreaded and from in-order to out-of-order, sophisticated cache hierarchies, coherence hardware, on-chip interconnects, memory controllers, and main memory. McSimA+ is an application-level+ simulator, offering a middle ground between a full-system simulator and an application-level simulator. Therefore, it enjoys the light weight of an application-level simulator and the full control of threads and processes as in a full-system simulator. This paper also explores an asymmetric clustered manycore architecture that can reduce the thread migration cost to achieve a noticeable performance improvement compared to a state-of-the-art asymmetric manycore architecture.
INDEX TERMS
Multicore processing, Instruction sets, Microarchitecture, Hardware, Accuracy
CITATION

J. H. Ahn, S. Li, S. O and N. P. Jouppi, "McSimA+: A manycore simulator with application-level+ simulation and detailed microarchitecture modeling," 2013 IEEE International Symposium on Performance Analysis of Systems and Software (ISPASS), Austin, TX, USA USA, 2013, pp. 74-85.
doi:10.1109/ISPASS.2013.6557148
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