Fast Application Tuning

This topic describes how to use fast application tuning to find optimal settings for the Intel® MPI Library.

Syntax

--fast [<value>] or –f [<value>]

or

I_MPI_TUNE_FAST=<value>

Arguments

<value>

Binary indicator

enable | yes | on | 1

Enable the fast application tuning. This value is only applicable for the application tuning mode

disable | no | off | 0

Disable the fast application tuning. This is the default value

Description

If you set I_MPI_TUNE_FAST to enable, the mpitune utility executes alternate fast application tuning procedure. The fast application tuning uses the same resulting configuration file used in previous tuning.

Example 1

$ mpitune --application \“mpirun …\” --fast

Example 2

$ export I_MPI_TUNE_FAST=enable

$ mpitune --application \“mpirun …\”

Note

If you use the --help option and the --fast option together, the help message of app_tune is printed.