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Cut-through delivery in Trapeze: An exercise in low-latency messaging

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4 Author(s)
K. G. Yocum ; Dept. of Comput. Sci., Duke Univ., Durham, NC, USA ; J. S. Chase ; A. J. Gallatin ; A. R. Lebeck

New network technology continues to improve both the latency and bandwidth of communication in computer clusters. The fastest high-speed networks approach or exceed the I/O bus bandwidths of “gigabit-ready” hosts. These advances introduce new considerations for the design of network interfaces and messaging systems for low-latency communication. This paper investigates cut-through delivery, a technique for overlapping host I/O DMA transfers with network traversal. Cut-through delivery significantly reduces end-to-end latency of large messages, which are often critical for application performance. We have implemented cut-through delivery in Trapeze, a new messaging substrate for network memory and other distributed operating system services. Our current Trapeze prototype is capable of demand-fetching 8 K virtual memory pages in 200 μs across a Myrinet cluster of DEC AlphaStations

Published in:

High Performance Distributed Computing, 1997. Proceedings. The Sixth IEEE International Symposium on

Date of Conference:

5-8 Aug 1997