Tutorial

Analyze MPI Applications with Intel® Trace Analyzer and Collector and Intel® VTune™ Profiler

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ID 773180
Date 3/31/2023
Public
Document Table of Contents
Document Table of Contents x
Analyze MPI Applications with Intel® Trace Analyzer and Collector and Intel® VTune™ Profiler
Analyze MPI Applications with Intel® Trace Analyzer and Collector and Intel® VTune™ Profiler x
Prerequisites Starting Intel® Trace Analyzer Starting Intel® VTune™ Profiler Analyzing an MPI Application Summary Notices and Disclaimers
Analyzing an MPI Application x
Optimizing MPI Communications Improving Intra-process Performance
Optimizing MPI Communications x
Prepare for Analysis Ungroup MPI Functions Detect Serialization in Function Profile and Message Profile Compare Original Trace File With Idealized Trace File Remove Serialization Compare Two Trace Files Analyze Optimized Communications
Improving Intra-process Performance x
Run Basic Hotspots Analysis Interpret Results
Analyze MPI Applications with Intel® Trace Analyzer and Collector and Intel® VTune™ Profiler

Compare Two Trace Files

Compare two trace files with the help of the Comparison View. To open a Comparison View for the original application trace file (poisson_sendrecv.single.stf), go to View > Compare. In the dialog that appears, choose the trace file of the revised application (poisson_icomm.single.stf). The Comparison View shows an Event Timeline for each trace file and a Comparison Function Profile chart.

Zoom into the first iteration in each trace file. The Comparison View looks similar to:



In the Comparison View, you can see that using non-blocking communication helps to remove serialization and decrease the time of communication of processes.

Parent topic: Optimizing MPI Communications
Level Two Title