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Main Title: Composable local memory organisation for streaming applications on embedded MPSoCs
Author(s): Ambrose, Jude
Molnos, Anca
Nelson, Andrew
Cotofana, Sorin
Goossens, Kees
Juurlink, Ben
Type: Conference Object
Language Code: en
Abstract: Multi-Processor Systems on a Chip (MPSoCs) are suitable platforms for the implementation of complex embedded applications. An MPSoC is composable if the functional and temporal behaviour of each application is independent of the absence or presence of other applications. Composability is required for application design and analysis in isolation, and integration with linear effort. In this paper we propose a composable organisation for the top level of a memory hierarchy. This organisation preserves the short (one cycle) access time desirable for a processor's frequent local accesses and enables the predictability demanded by real-time applications. We partition the local memory in two blocks, one private, for local tile data, and another shared for inter-tile data communication. To avoid application interference, we instantiate one such shared local memory block and an Remote Direct Memory Access (RDMA) for each application running on the processor. We implement this organisation on an MPSoC with two processors on an FPGA. On this platform we execute a composition of applications consisting of a JPEG decoder, and a synthetic application. Our experiments indicate that an application's timing is not affected by the behaviour of another application, thus composability is achieved. Moreover, the utilisation of the RDMA component leads to 45% performance increase on average for a number of workloads covering a large range of communication/computation ratios.
Issue Date: 2011
Date Available: 26-Oct-2017
DDC Class: 004 Datenverarbeitung; Informatik
Subject(s): MPSoC
direct memory access
Proceedings Title: Proceedings of the 8th ACM International Conference on Computing Frontiers
Publisher: Association for Computing Machinery (ACM)
Publisher Place: New York, NY
Article Number: 23
Publisher DOI: 10.1145/2016604.2016631
ISBN: 978-1-4503-0698-0
Appears in Collections:FG Architektur eingebetteter Systeme » Publications

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