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- W3174503316 abstract "Performance of applications in production environments can be sensitive to network congestion. Cray Aries supports adaptively routing each network packet independently based on the load or congestion encountered as a packet traverses the network. Software can dictate different routing policies, adjusting between minimal and non-minimal bias, for each posted message. We have extensively evaluated the sensitivity of the routing bias selection on application performance as well as whole system performance in both production and controlled conditions. We show that the default routing bias used in Aries-based systems is often sub-optimal and that using a higher bias towards minimal routes will not only reduce the congestion effects on the application but also will decrease the overall congestion on the network. This routing scheme results in not only improved mean performance (by up to 12%) of most production applications but also reduced run-to-run variability. Our study prompted the two supercomputing facilities (ALCF and NERSC) to change the default routing mode on their Aries-based systems. We present the substantial improvement measured in the overall congestion management and interconnect performance in production after making this change." @default.
- W3174503316 created "2021-07-05" @default.
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- W3174503316 date "2021-05-01" @default.
- W3174503316 modified "2023-09-25" @default.
- W3174503316 title "Performance Evaluation of Adaptive Routing on Dragonfly-based Production Systems" @default.
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- W3174503316 doi "https://doi.org/10.1109/ipdps49936.2021.00042" @default.
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