CHAPTER 8

Messaging Layer Software

The majority of this text has been concentrated on issues facing the design of the interconnection network: switching, routing, and supporting router architectures. However, from the user’s perspective the experienced latency/throughput performance is not only a function of the network, but also of the operations performed at the source and destination processors to inject and receive messages from the network. End-to-end performance can be measured from data located in the memory of the sending process to data in the memory of the receiving process. This includes the process of preparing data for transmission (e.g., computation of packet headers and check sums) and injecting/ejecting messages into/out of the ...

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