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

Numbers of Ranks per Host

Use the -pr <n:m> option to set the number of ranks per host:

$ mpitune ... -pr 1:16

Similarly, the mpitune utility affects the ranks in the rage between 4 and 16 whose numbers are powers of 2. For the example above, it creates tuned settings for all cases where the number of ranks is 1, 2, 4, 8, 16.

If the lower and the upper bounds are the same, the mpitune utility tunes for the ppn=24 case only:

$ mpitune ... -pr 24:24
Parent topic: Task 1: Minimize Tuning Time in Cluster- Specific Mode
Level Two Title