SC12 Home > SC12 Schedule > SC12 Presentation - Extending the BT NAS Parallel Benchmark to Exascale Computing

SCHEDULE: NOV 10-16, 2012

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Extending the BT NAS Parallel Benchmark to Exascale Computing

SESSION: Performance Optimization

EVENT TYPE: Papers

TIME: 1:30PM - 2:00PM

SESSION CHAIR: Padma Raghavan

AUTHOR(S):Rob F. Van Der Wijngaart, Srinivas Sridharan, Victor W. Lee

ROOM:255-BC

ABSTRACT:
The NAS Parallel Benchmarks (NPB) are a well-known suite of benchmarks that proxy scientific computing applications. They specify several problem sizes that represent how such applications may run on different sizes of HPC systems. However, even the largest problem (Class F) is still far too small to exercise properly a Petascale supercomputer. Our work shows how one may scale the Block Tridiagonal (BT) NPB from todays size to Petascale and Exascale computing systems. In this paper we discuss the pros and cons of various ways of scaling. We discuss how scaling BT would impact computation, memory access and communications, and highlight the expected bottleneck, which turns out to be not memory or communication bandwidth, but latency. Two complementary ways are presented to overcome latency obstacles. We also describe a practical method to gather approximate performance data for BT at exascale on actual hardware, without requiring an exascale system.

Chair/Author Details:

Padma Raghavan (Chair) - Pennsylvania State University

Rob F. Van Der Wijngaart - Intel Corporation

Srinivas Sridharan - Intel Corporation

Victor W. Lee - Intel Corporation

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Extending the BT NAS Parallel Benchmark to Exascale Computing

SESSION: Performance Optimization

EVENT TYPE:

TIME: 1:30PM - 2:00PM

SESSION CHAIR: Padma Raghavan

AUTHOR(S):Rob F. Van Der Wijngaart, Srinivas Sridharan, Victor W. Lee

ROOM:255-BC

ABSTRACT:
The NAS Parallel Benchmarks (NPB) are a well-known suite of benchmarks that proxy scientific computing applications. They specify several problem sizes that represent how such applications may run on different sizes of HPC systems. However, even the largest problem (Class F) is still far too small to exercise properly a Petascale supercomputer. Our work shows how one may scale the Block Tridiagonal (BT) NPB from todays size to Petascale and Exascale computing systems. In this paper we discuss the pros and cons of various ways of scaling. We discuss how scaling BT would impact computation, memory access and communications, and highlight the expected bottleneck, which turns out to be not memory or communication bandwidth, but latency. Two complementary ways are presented to overcome latency obstacles. We also describe a practical method to gather approximate performance data for BT at exascale on actual hardware, without requiring an exascale system.

Chair/Author Details:

Padma Raghavan (Chair) - Pennsylvania State University

Rob F. Van Der Wijngaart - Intel Corporation

Srinivas Sridharan - Intel Corporation

Victor W. Lee - Intel Corporation

Add to iCal  Click here to download .ics calendar file

Add to Outlook  Click here to download .vcs calendar file

Add to Google Calendarss  Click here to add event to your Google Calendar