Tutorial

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

Download PDF
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

Commands for Fast Application-Specific Tuning

To use the MPI tuner in the fast application-specific mode:

  1. Use the --fast (-f) option to switch to this mode. Use the --application (-a) option to tune the specified workload for the provided environment and command line settings, or use --stats(-s) to pass previously gathered statistics. The tuner records the new optimal settings in the myprog.conf file:

    $ mpitune –-fast --application \"mpirun -n 32 ./myprog\" -o ./myprog.conf

    Or use this command:

    $ mpitune –f -s ./stats.txt -o ./myprog.conf
    NOTE:
    Use the --fast (-f) and --help(-h) options together to see other available options for this mode.

  2. Use the –tune option to pick up the optimal recorded values for your application at runtime.

    $ mpirun -tune ./myprog.conf -n 32 ./myprog
Parent topic: Task 3: Application-Specific Tuning
Level Two Title