Tutorial

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

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ID 773180
Date 3/31/2023
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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

Analyzing an MPI Application

Use Intel Trace Analyzer to conduct a performance analysis and tune MPI communications between processes. Then switch to the VTune Profiler to carry out a new round of analysis and identify hotspots on specific processes.

This tutorial uses the poisson sample code as well as the sample trace files poisson_sendrecv.single.stf and poisson_icomm.single.stf to demonstrate the interoperability of the Intel Trace Analyzer and VTune Profiler that enables you to analyze and further tune the application.



Step 1: In Intel Trace Analyzer and Collector, Optimize MPI communications

  • Detect serialization in Function Profile and Message Profile.

  • Find imbalance on the inter-process level by comparing the original application with the idealized one.

  • Remove serialization.

Step 2: In VTune Profiler, Improve intra-process performance

  • Identify hotspots on the intra-process level.

  • Interpret the collected data to find MPI processes in the workload and find possible ways to resolve the issue.

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