Enhancing L2 organization for CMPs with a center cell

Chun Liu, Anand Sivasubramaniam, Mahmut Kandemir, Mary Jane Irwin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

Chip multiprocessors (CMPs) are becoming a popular way of exploiting ever-increasing number of on-chip transistors. At the same time, the location of data on the chip can play a critical role in the performance of these CMPs because of the growing on-chip storage capacities and the relative cost of wire delays. It is important to locate the data at the right place at the right time in the on-chip cache hierarchy. This paper presents a novel L2 cache organization for CMPs with these goals in mind. We first study the data sharing characteristics of a wide spectrum of multi-threaded applications and show that, while there are a considerable number of L2 accesses to shared data, the volume of this data is relatively low. Consequently, it is important to keep this shared data fairly close to all processor cores for both performance and power reasons. Motivated by this observation, we propose a small Center Cell cache residing in the middle of the processor cores which provides fast access to its contents. We demonstrate that this cache organization can considerably lower the number of block migrations between the L2 portions that are closer to each core, thus providing better performance and power.

Original languageEnglish (US)
Title of host publication20th International Parallel and Distributed Processing Symposium, IPDPS 2006
PublisherIEEE Computer Society
ISBN (Print)1424400546, 9781424400546
DOIs
StatePublished - 2006
Event20th IEEE International Parallel and Distributed Processing Symposium, IPDPS 2006 - Rhodes Island, Greece
Duration: Apr 25 2006Apr 29 2006

Publication series

Name20th International Parallel and Distributed Processing Symposium, IPDPS 2006
Volume2006

Other

Other20th IEEE International Parallel and Distributed Processing Symposium, IPDPS 2006
CountryGreece
CityRhodes Island
Period4/25/064/29/06

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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