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Paper
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Mitigating Inter-Job Interference Using Adaptive Flow-Aware Routing
Event Type
Paper
Registration Categories
TP
Tags
Networks
Resource Management
Scheduling
State of the Practice
System Software
Finalists
BSP Finalist
TimeTuesday, November 13th4:30pm - 5pm
LocationC140/142
DescriptionOn most high performance computing platforms, applications share network resources with other jobs running concurrently on the system. Inter-job network interference can have a significant impact on the performance of communication-intensive applications, and no satisfactory solutions yet exist for mitigating this degradation.

In this paper, we analyze network congestion caused by multi-job workloads on two production systems that use popular network topologies---fat-tree and dragonfly. For each system, we establish a regression model to relate network hotspots to application performance degradation, showing that current routing strategies are insufficient to load-balance network traffic and mitigate interference on production systems. We then propose an alternative type of adaptive routing strategy, which we call adaptive flow-aware routing. We implement a prototype of our strategy, and tests on the fat-tree system show up to a 46% improvement in job run time when compared to the default routing.
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