SC12 Home > SC12 Schedule > SC12 Presentation - High Performance Non-Blocking and Power-Aware Collective Communication for Next Generation InfiniBand Clusters

SCHEDULE: NOV 10-16, 2012

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High Performance Non-Blocking and Power-Aware Collective Communication for Next Generation InfiniBand Clusters

SESSION: Doctoral Showcase - Dissertation Research Showcase

EVENT TYPE: Doctoral Showcase

TIME: 1:45PM - 2:00PM


Presenter(s):Krishna Kandalla


The design and development of current generation supercomputing systems is fueled by the increasing use of multi-core processors, accelerators and high-speed interconnects, However, scientific applications are unable to fully harness the computing power offered by current generation systems. Two of the most significant challenges are communication/synchronization latency and power consumption. Emerging parallel programming models offer asynchronous communication primitives that can, in theory, allow applications to achieve latency hiding. However, delivering near perfect communication/computation overlap is non-trivial. Modern hardware components are designed to aggressively conserve power during periods of inactivity. However, supercomputing systems are rarely idle and software libraries need to be designed in a power-aware manner. In our work, we address both of critical problems. We propose hardware-based non-blocking MPI collective operations and re-design parallel applications to achieve better performance through latency hiding. We also propose power-aware MPI collective operations to deliver fine-grained power-savings to applications with minimal performance overheads.

Chair/Presenter Details:

Yong Chen (Chair) - Texas Tech University

Krishna Kandalla - Ohio State University

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