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Lookup NU author(s): Dr Craig Sharp, Dr Rich Davison, Dr Gary Ushaw, Professor Raj Ranjan, Professor Graham MorganORCiD
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
The Graphics Processing Unit (GPU) is now used extensively for general purpose GPU programming (GPGPU), allowing for greater exploitation of the multi-core model across many application domains. This is particularly true in cloud/edge/fog computing, where multiple GPU enabled servers support many different end user services. This move away from the naturally parallel domain of graphics can incur significant performance issues. Unlike the CPU, code that is hindered from execution due to blocking/waiting on the GPU can affect thousands of threads, rendering the advantages of a GPU irrelevant and reducing a highly parralel environemnt down to a serial one in the worst case. In this paper we present a solution that minimises blocking/waiting in GPGPU computing using a contention manager that offsets memory conflicts across threads through thread re-ordering. We consider conflicts of memory not only to avoid corruption(standard for transactional memory) but also in the semantic layer of application logic (e.g., enforcing ordering to ensure money drawn from bank account occurs after all deposits). We demonstrate how our approach is successful across a number of industry benchmarks and compare our approach to the only other related solution. We also demonstrate that our approach is scalable in terms of thread numbers (a key requirement on the GPU). We believe this is the first work of its kind demonstrating a generalised conflict and semantic contention manager suitable for the scale of parralel execution found on a GPU.
Author(s): Shen Q, Sharp C, Davison R, Ushaw G, Ranjan R, Zomaya AY, Morgan G
Publication type: Article
Publication status: Published
Journal: Journal of Parallel and Distributed Computing
Year: 2020
Volume: 139
Pages: 1-17
Print publication date: 01/05/2020
Online publication date: 28/01/2020
Acceptance date: 23/12/2019
Date deposited: 29/01/2020
ISSN (print): 0743-7315
ISSN (electronic): 1096-0848
Publisher: Elsevier
URL: https://doi.org/10.1016/j.jpdc.2019.12.018
DOI: 10.1016/j.jpdc.2019.12.018
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