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Title: In-cache query co-processing on coupled CPU-GPU architectures
Authors: He, Jiong
Zhang, Shuhao
He, Bingsheng
Keywords: Memory architecture
Query processing
Issue Date: 2014
Source: He, J., Zhang, S., & He, B. (2014). In-cache query co-processing on coupled CPU-GPU architectures. Proceedings of the VLDB Endowment, 8(4), 329-340. doi: 10.14778/2735496.2735497
Series/Report no.: Proceedings of the VLDB Endowment
Abstract: Recently, there have been some emerging processor designs that the CPU and the GPU (Graphics Processing Unit) are integrated in a single chip and share Last Level Cache (LLC). However, the main memory bandwidth of such coupled CPU-GPU architectures can be much lower than that of a discrete GPU. As a result, current GPU query co-processing paradigms can severely suffer from memory stalls. In this paper, we propose a novel in-cache query co-processing paradigm for main memory On-Line Analytical Processing (OLAP) databases on coupled CPU-GPU architectures. Specifically, we adapt CPU-assisted prefetching to minimize cache misses in GPU query co-processing and CPU-assisted decompression to improve query execution performance. Furthermore, we develop a cost model guided adaptation mechanism for distributing the workload of prefetching, decompression, and query execution between CPU and GPU. We implement a system prototype and evaluate it on two recent AMD APUs A8 and A10. The experimental results show that 1) in-cache query co-processing can effectively improve the performance of the state-of-the-art GPU co-processing paradigm by up to 30% and 33% on A8 and A10, respectively, and 2) our workload distribution adaption mechanism can significantly improve the query performance by up to 36% and 40% on A8 and A10, respectively.
ISSN: 21508097
DOI: 10.14778/2735496.2735497
Schools: School of Computer Engineering 
Rights: © 2014 VLDB Endowment. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit Obtain permission prior to any use beyond those covered by the license. Contact copyright holder by emailing Articles from this volume were invited to present their results at the 41st International Conference on Very Large Data Bases, August 31st - September 4th 2015, Kohala Coast, Hawaii.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SCSE Conference Papers

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