DYNAMICALLY SCALABLE QUEUES FOR PERFORMANCE DRIVEN PCI EXPRESS MEMORY TRAFFIC
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United States of America Patent
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app pub date -
Jan 21, 2009
filing date -
Aug 22, 2006
priority date (Note) -
Abandoned
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Abstract
A computer program product for implementing a method within a data processing system and a PCI Express protocol for enabling high performance IO data transfers for multiple, different IO configurations, which include variable packet sizes and/or variable/different numbers of transactions on the IO link. PCI Express protocol is enhanced to support utilization of counters and dynamically variable queue sizes. In addition to the standard queue entries, several (or a selected number of) dynamically changeable queue entries are provided/reserved and a dynamic queue modification (DQM) utility is provided within the enhanced PCI Express protocol to monitor ongoing, current data transfer and manage when the size(s) of the queue entries are modified (increased or decreased) based on current data traffic transmitting on the PCI Express IO link. The enhanced PCI Express protocol provides an equilibrium point at which many large data packets are transferred efficiently, while imposing a limit on the number of each size of packets outstanding.
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