Method for improving bus utilization using predictive...

Details Method for improving bus utilization using predictive... Method for improving bus utilization using predictive...

2006-05-18

2009-06-23

Myers, Paul R (Department: 2111)

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus interface architecture

C710S116000

Reexamination Certificate

active

07552268

ABSTRACT:
A PCI bridge device includes an arbiter that uses state information comprised of knowledge of the bus protocol and a history of recent transactions to predict the type of transaction a requestor will issue. The prediction is then used as a basis to mask or allow bus requests from the requester. The arbiter does not grant access to devices that will predictably issue transactions that do not result in the transfer of data. This approach can decrease time wasted by devices attempting unsuccessful transactions and can provide a commensurate increase in bus utilization. The overall effect is an increase in average bus bandwidth and a decrease in average data transfer latencies.

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PCI Special Interest Group, “PCI Local Bus Specification”, Aquired at: http://www.ece.mtu.edu/faculty/btdavis/courses/mtu—ee3173—f04/papers/PCI—22.pdf, Chapter 3—“Bus Operation” Section 3.3, 3.4 and 3.5, pp. 46-88, Revision 2.2, Dec. 18, 1998.

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