Short-Circuiting Memory Traffic in Handheld Platforms

Praveen Yedlapalli, Nachiappan Chidambaram Nachiappan, Niranjan Soundararajan, Anand Sivasubramaniam, Mahmut Kandemir, Chitaranjan Das

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

Abstract

Handheld devices are ubiquitous in today's world. With their advent, we also see a tremendous increase in device-user interactivity and real-time data processing needs. Media (audio/video/camera) and gaming use-cases are gaining substantial user attention and are defining product successes. The combination of increasing demand from these use-cases and having to run them at low power (from a battery) means that architects have to carefully study the applications and optimize the hardware and software stack together to gain significant optimizations. In this work, we study workloads from these domains and identify the memory subsystem (system agent) to be a critical bottleneck to performance scaling. We characterize the lifetime of the "frame-based" data used in these workloads through the system and show that, by communicating at frame granularity, we miss significant performance optimization opportunities, caused by large IP-to-IP data reuse distances. By carefully breaking these frames into sub-frames, while maintaining correctness, we demonstrate substantial gains with limited hardware requirements. Specifically, we evaluate two techniques, flow-buffering and IP-IP short-circuiting, and show that these techniques bring both power-performance benefits and enhanced user experience.

Original languageEnglish (US)
Title of host publicationProceedings - 47th Annual IEEE/ACM International Symposium on Microarchitecture, MICRO 2014
PublisherIEEE Computer Society
Pages166-177
Number of pages12
EditionJanuary
ISBN (Electronic)9781479969982
DOIs
StatePublished - Jan 15 2015
Event47th Annual IEEE/ACM International Symposium on Microarchitecture, MICRO 2014 - Cambridge, United Kingdom
Duration: Dec 13 2014Dec 17 2014

Publication series

NameProceedings of the Annual International Symposium on Microarchitecture, MICRO
NumberJanuary
Volume2015-January
ISSN (Print)1072-4451

Other

Other47th Annual IEEE/ACM International Symposium on Microarchitecture, MICRO 2014
CountryUnited Kingdom
CityCambridge
Period12/13/1412/17/14

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All Science Journal Classification (ASJC) codes

  • Hardware and Architecture

Cite this

Yedlapalli, P., Nachiappan, N. C., Soundararajan, N., Sivasubramaniam, A., Kandemir, M., & Das, C. (2015). Short-Circuiting Memory Traffic in Handheld Platforms. In Proceedings - 47th Annual IEEE/ACM International Symposium on Microarchitecture, MICRO 2014 (January ed., pp. 166-177). [7011386] (Proceedings of the Annual International Symposium on Microarchitecture, MICRO; Vol. 2015-January, No. January). IEEE Computer Society. https://doi.org/10.1109/MICRO.2014.60