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題 名 | Shared-Bus Structures and Arbitration Protocols |
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作 者 | 李炯三; 洪啟強; 梅振發; | 書刊名 | 華夏學報 |
卷 期 | 31 1997.02[民86.02] |
頁 次 | 頁12675-12698 |
分類號 | 448.595 |
關鍵詞 | |
語 文 | 英文(English) |
英文摘要 | This paper explores several shared-bus structures and arbitration protocols. In a separated address-bus (Abus) and data-bus (Dbus) scheme, the utilization of the Dbus is always higher than that of the Abus; this is a loaded unbalancing problem. To address this problem, we present a new shared bus scheme which allows two different requests to be served at the same time and supports a multiplexed Abus to serve some traffic of the Dbus for reducing the unbalanced load between the two buses. A group arbitration protocol is one of the most used algorithm to ensure the access chance for lower priority processors. However, the lowest priority processor always spends the longest bus waiting time for obtaining the bus ownership. To address this problem, we also present a modified protocol from group arbitration to support an approximately equal bus waiting time on the average for each processor. In addition, this paper also evaluates the bus utilization of each bus scheme to determine an adequate number of processors connected in a shared bus system. |
本系統中英文摘要資訊取自各篇刊載內容。