Adaptive Cache Memories for SMT Processors

11 years 5 days ago
Adaptive Cache Memories for SMT Processors
Abstract—Resizable caches can trade-off capacity for access speed to dynamically match the needs of the workload. In Simultaneous Multi-Threaded (SMT) cores, the caching needs can vary greatly across the number of threads and their characteristics, offering opportunities to dynamically adjust cache resources to the workload. In this paper we propose the use of resizable caches in order to improve the performance of SMT cores, and introduce a new control algorithm that provides good results independent of the number of running threads. In workloads with a single thread, the resizable cache control algorithm should optimize for cache miss behavior because misses typically form the critical path. In contrast, with several independent threads running, we show that optimizing for cache hit behavior has more impact, since large SMT workloads have other threads to run during a cache miss. Moreover, we demonstrate that these seemingly diametrically opposed policies can be simultaneously sati...
Sonia López, Oscar Garnica, David H. Albone
Added 06 Dec 2010
Updated 06 Dec 2010
Type Conference
Year 2010
Where DSD
Authors Sonia López, Oscar Garnica, David H. Albonesi, Steven G. Dropsho, Juan Lanchares, José Ignacio Hidalgo
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