NDLI: MPI-focused Tracing with OTFX: An MPI-aware In-memory Event Tracing Extension to the Open Trace Format 2

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MPI-focused Tracing with OTFX: An MPI-aware In-memory Event Tracing Extension to the Open Trace Format 2

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MPI-focused Tracing with OTFX: An MPI-aware In-memory Event Tracing Extension to the Open Trace Format 2

Content Provider	ACM Digital Library
Author	Wagner, Michael Knüpfer, Andreas Doleschal, Jens
Abstract	Performance analysis tools are more than ever inevitable to develop applications that utilize the enormous computing resources of high performance computing (HPC) systems. In event-based performance analysis the amount of collected data is one of the most urgent challenges. The resulting measurement bias caused by uncoordinated intermediate memory buffer flushes in the monitoring tool can render a meaningful analysis of the parallel behavior impossible. In this paper we address the impact of intermediate memory buffer flushes and present a method to avoid file interaction in the monitoring tool entirely. We propose an MPI-focused tracing approach that provides the complete MPI communication behavior and adapts the remaining application events to an amount that fits into a single memory buffer. We demonstrate the capabilities of our method with an MPI-focused prototype implementation of OTFX, based on the Open Trace Format 2, a state-of-the-art Open Source event tracing library used by the performance analysis tools Vampir, Scalasca, and Tau. In a comparison to OTF2 based on seven applications from different scientific domains, our prototype introduces in average 5.1% less overhead and reduces the trace size up to three orders of magnitude.
Starting Page	1
Ending Page	8
Page Count	8
File Format	PDF
ISBN	9781450337953
DOI	10.1145/2802658.2802664
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2015-09-21
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Otfx Score-p Otf2 Mpi Event tracing Tools Gromacs Performance analysis
Content Type	Text
Resource Type	Article

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