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    Shared Address Space I/O: A Novel I/O Approach for System-on-a-Chip Networking

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    git-cercs-04-08.pdf (72.78Kb)
    Date
    2004-02-19
    Author
    Sun, Di-Shi
    Blough, Douglas M.
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    Abstract
    For real-time system-on-a-chip (SoC) network applications, high-speed and low-latency network I/O is the key to achieve predictable execution and high performance. Existing network I/O approaches are either not directly suited to SoC applications, or too complicated and expensive. This paper introduces a novel approach, referred to as shared address space I/O, for real-time SoC network applications. This approach facilitates building of heterogeneous multiprocessor systems with application intensive processors (main processor) and I/O intensive processors (I/O processor), where network I/O processing can be offloaded to a specialized I/O processor. With the shared address space I/O approach, in such a system, communication and synchronization between main and I/O processors can be implemented with a shared address space. This approach is realized through Atalanta, a heterogeneous real-time SoC operating system we have developed. In this paper, we demonstrate that shared address space I/O can provide high-speed and low-latency network I/O for SoC network applications.
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    http://hdl.handle.net/1853/93
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