NDLI: Improving memory system performance for multimedia applications

Content Provider	Springer Nature Link
Author	Youn, Jonghee M. Cho, Doosan
Copyright Year	2015
Abstract	The cost and performance of embedded systems heavily depends on the performance of memories it utilizes. Latency of a memory access is one of the major bottlenecks in the system performance. In software compilation, it is known that there are high variations in memory access latency depending on the ways of storing/retrieving variables in code to/from memories. To improve the latency, it needs a technique to maximize the use of memory bandwidth. A burst transfer is well known technique to maximally utilize memory bandwidth. The burst transfer capability offers an average access time reduction of more than 65 % for an eight-word sequential transfer. However, the problem of utilizing such burst transfers has not been generally addressed, and unfortunately, it is not tractable. In this work, we present a new technique that both identifies sequences of single load and store instructions for combining into burst transfers. The proposed technique provides an optimal data placement of nonarray variables to achieve the maximum utilization of burst data transfers. The major contributions of our work are, 1) we prove that the problem is NP-hard and 2) we propose an exact formulation of the problem and an efficient data placement algorithm. From experiments with a set of multimedia benchmarks, we confirm that our proposed technique uses on average 7 times more burst accesses than generated codes from ARM commercial compiler.
Starting Page	5951
Ending Page	5963
Page Count	13
File Format	PDF
ISSN	13807501
Journal	Multimedia Tools and Applications
Volume Number	76
Issue Number	4
e-ISSN	15737721
Language	English
Publisher	Springer US
Publisher Date	2015-08-09
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Memory system Energy consumption Compiler optimization Restructuring burst mode Multimedia Information Systems Computer Communication Networks Data Structures, Cryptology and Information Theory Special Purpose and Application-Based Systems
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Hardware and Architecture Software Media Technology

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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