Tutorial

Using MPI Tuner for Intel® MPI Library on Linux* OS

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ID 768652
Date 2/19/2016
Public
Document Table of Contents
Document Table of Contents x
Tutorial: Using MPI Tuner for Intel® MPI Library
Tutorial: Using MPI Tuner for Intel® MPI Library x
Legal Information Overview Getting Started Task 1: Minimize Tuning Time in Cluster- Specific Mode Task 2: Include Missing Values in the Default Parameters Grid during Cluster Tuning Task 3: Application-Specific Tuning Troubleshooting
Getting Started x
Accessing MPI Tuner MPI Tuner Modes
MPI Tuner Modes x
Cluster-Specific Tuning Commands Application-Specific Tuning Commands
Task 1: Minimize Tuning Time in Cluster- Specific Mode x
Host Range Numbers of Ranks per Host Fabric Usage (I_MPI_FABRICS) Message Sizes Most Common MPI Functions
Task 3: Application-Specific Tuning x
Commands for Fast Application-Specific Tuning Commands for Topology Awareness Rank Placement Optimization
Tutorial: Using MPI Tuner for Intel® MPI Library

Troubleshooting

This topic explains how to troubleshoot common issues seen when running with the MPI Tuner.

Issue

Cause and Possible Solutions

The scheduler of mpitune is empty.
  1. Check the arguments for mpitune and ensure they do not contradict each other. For example, values for --options-set and -- options-exclude should not overlap.
  2. If no fabrics or devices pass checking, try running an MPI test application with the same configuration. The issue might be caused by an incorrect host file or cluster configuration.

mpitune runs very long.

Check the projected schedule before the real launch, using the –so option.

Use methods described in task 1 and task 2 and/or their combinations to skip unnecessary jobs
Parent topic: Tutorial: Using MPI Tuner for Intel® MPI Library
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