SC is the International Conference for
 High Performnance Computing, Networking, Storage and Analysis

SCHEDULE: NOV 13-19, 2010

Accelerating I/O Forwarding in IBM Blue Gene/P Systems

SESSION: System I/O Optimization


TIME: 1:30PM - 2:00PM


AUTHOR(S):Venkatram Vishwanath, Mark Hereld, Kamil Iskra, Dries Kimpe, Vitali Morozov, Michael E. Papka, Robert Ross, Kazutomo Yoshii


Current leadership-class machines suffer from a significant imbalance between their computational power and their I/O bandwidth. I/O forwarding is a paradigm that attempts to bridge the increasing performance and scalability gap between the compute and I/O components of leadership-class machines to meet the requirements of data intensive applications by shipping I/O calls from compute nodes to dedicated I/O nodes. I/O forwarding is a critical component of the I/O subsystem of the IBM Blue Gene P supercomputer currently deployed at several leadership computing facilities. We evaluate the performance of the existing I/O forwarding mechanisms for BG / P and identify the performance bottlenecks in the current design. We augment the I/O forwarding with two approaches: I/O scheduling using a work-queue model and asynchronous data staging. We evaluate the efficacy of our approaches using micro-benchmarks and application-level benchmarks on leadership-class systems.

Chair/Author Details:

Tevfik Kosar (Chair) - Louisiana State University

Venkatram Vishwanath - Argonne National Laboratory

Mark Hereld - Argonne National Laboratory

Kamil Iskra - Argonne National Laboratory

Dries Kimpe - University of Chicago/Argonne National Laboratory

Vitali Morozov - Argonne National Laboratory

Michael E. Papka - Argonne National Laboratory

Robert Ross - Argonne National Laboratory

Kazutomo Yoshii - Argonne National Laboratory

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The full paper can be found in the ACM Digital Library and IEEE Computer Society

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