Utility-based acceleration of multithreaded applications on asymmetric CMPs

José A. Joao, M. Aater Suleman, Onur Mutlu, Yale N. Patt
2013 Proceedings of the 40th Annual International Symposium on Computer Architecture - ISCA '13  
Asymmetric Chip Multiprocessors (ACMPs) are becoming a reality. ACMPs can speed up parallel applications if they can identify and accelerate code segments that are critical for performance. Proposals already exist for using coarsegrained thread scheduling and fine-grained bottleneck acceleration. Unfortunately, there have been no proposals offered thus far to decide which code segments to accelerate in cases where both coarse-grained thread scheduling and fine-grained bottleneck acceleration
more » ... ld have value. This paper proposes Utility-Based Acceleration of Multithreaded Applications on Asymmetric CMPs (UBA), a cooperative software/hardware mechanism for identifying and accelerating the most likely critical code segments from a set of multithreaded applications running on an ACMP. The key idea is a new Utility of Acceleration metric that quantifies the performance benefit of accelerating a bottleneck or a thread by taking into account both the criticality and the expected speedup. UBA outperforms the best of two state-of-the-art mechanisms by 11% for single application workloads and by 7% for two-application workloads on an ACMP with 52 small cores and 3 large cores.
doi:10.1145/2485922.2485936 dblp:conf/isca/JoaoSMP13 fatcat:js6dwddr25ao7h5rr2tx4lfxvq