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VWS: a versatile warp scheduler for exploring diverse cache localities of GPGPU applications

Published: 07 June 2015 Publication History

Abstract

Massive multi-threading of GPGPU demands for efficient usage of caches with limited capacity. In this work, we propose a versatile warp scheduler (VWS) to reduce the cache miss rate in GPGPU. VWS retains the intra-warp cache locality using an efficient per-warp working set estimator and enhances intra-/inter-cooperative thread array (CTA) cache locality through imposing a CTA-aware scheduling policy and a new CTA dispatching mechanism. The significantly improved hit rate of cache hierarchy enables VWS to achieve on average 38.4% and 9.3% IPC improvement across diverse GPGPU applications compared to a widely-used and a state-of-the-art warp schedulers, respectively.

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    cover image ACM Conferences
    DAC '15: Proceedings of the 52nd Annual Design Automation Conference
    June 2015
    1204 pages
    ISBN:9781450335201
    DOI:10.1145/2744769
    Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than the author(s) must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected].

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    Published: 07 June 2015

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    June 7 - 11, 2015
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