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

Overview

Intel® Trace Analyzer and Collector profiles and analyzes MPI applications to help focus your optimization efforts and quickly find bottlenecks to achieve high performance for HPC applications. Intel® Trace Collector generates trace files for MPI applications, while Intel® Trace Analyzer visualizes the MPI application behavior using the generated trace file.

Intel® VTune™ Profiler enables you to find serial and parallel code bottlenecks and speed execution. Use this tool to analyze the algorithm choices, understand where and how your application can benefit from available hardware resources, and identify code sections that may cause unnecessary power consumption.

To improve performance of some complex applications, it is necessary to analyze their cross-process behavior as well as their single process performance. Intel Trace Analyzer and Collector enables you to analyze communications between processes, while Intel VTune Profiler helps you find single process performance issues.

About This Tutorial

This tutorial demonstrates a workflow applied to a sample program called poisson.

Find the demonstrated in this tutorial sample attached to this document.

You can ultimately apply the same workflow to your own applications:

  • Find communication imbalance issues in your application using the Intel® Trace Analyzer charts
  • Find hotspots on the intra-process level of your application using Intel® VTune™ Profiler
  • Review the application
Estimated Duration 20-25 minutes
Learning Objectives

After you complete this tutorial, you should be able to:

  • Conduct a complex application analysis using Intel Trace Analyzer and Collector and Intel VTune Profiler
  • Improve overall performance
More Resources Learn more about the Intel Trace Analyzer and Collector and Intel VTune Profiler in the guides and tutorials available at Intel® Software Documentation Library.
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