NDLI: Reorder buffer: an energy-efficient multithreading architecture for hardware MIMD ray traversal

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Reorder buffer: an energy-efficient multithreading architecture for hardware MIMD ray traversal

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Reorder buffer: an energy-efficient multithreading architecture for hardware MIMD ray traversal

Content Provider	ACM Digital Library
Author	Kang, Seok Ryu, Soojung Shin, Youngsam Yoo, Jeong-Joon Hwang, Seok Joong Lee, Won-Jong
Abstract	In this paper, we present an energy- and area-efficient multithreading architecture for Multiple Instruction, Multiple Data (MIMD) ray tracing hardware targeted at low-power devices. Recent ray tracing hardware has predominantly adopted an MIMD approach for efficient parallel traversal of incoherent rays, and supports a multithreading scheme to hide latency and to resolve memory divergence. However, the conventional multithreading scheme has problems such as increased memory cost for thread storage and consumption of additional energy for bypassing threads to the pipeline. Consequently, we propose a new multithreading architecture called Reorder Buffer. Reorder Buffer solves these problems by constituting a dynamic reordering of the rays in the input buffer according to the results of cache accesses. Unlike conventional schemes, Reorder Buffer is cost-effective and energy-efficient because it does not need additional thread memory nor does it consume more energy because it makes use of existing resources. Simulation results show that our architecture is a potentially versatile solution for future ray tracing hardware in low-energy devices because it provides as much as 11.7% better cache utilization and is up to 4.7 times more energy-efficient than the conventional architecture.
Starting Page	21
Ending Page	32
Page Count	12
File Format	PDF
ISBN	9781450337076
DOI	10.1145/2790060.2790064
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2015-08-07
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Multithreading Ray tracing Gpu Mobile
Content Type	Text
Resource Type	Article

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