Intel® Fortran Compiler Classic and Intel® Fortran Compiler Developer Guide and Reference

ID 767251
Date 3/22/2024
Public

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Document Table of Contents

ipo-jobs, Qipo-jobs

Specifies the number of commands (jobs) to be executed simultaneously during the link phase of Interprocedural Optimization (IPO). This feature is only available for ifort.

Syntax

Linux:

-ipo-jobsn

Windows:

/Qipo-jobs:n

Arguments

n

Is the number of commands (jobs) to run simultaneously. The number must be greater than or equal to 1.

Default

-ipo-jobs1
or /Qipo-jobs:1

One command (job) is executed in an interprocedural optimization parallel build.

Description

This option specifies the number of commands (jobs) to be executed simultaneously during the link phase of Interprocedural Optimization (IPO). It should only be used if the link-time compilation is generating more than one object. In this case, each object is generated by a separate compilation, which can be done in parallel.

This option can be affected by the following compiler options:

  • [Q]ipo when applications are large enough that the compiler decides to generate multiple object files.

  • [Q]ipon when n is greater than 1.

  • [Q]ipo-separate

CAUTION:

Be careful when using this option. On a multi-processor system with lots of memory, it can speed application build time. However, if n is greater than the number of processors, or if there is not enough memory to avoid thrashing, this option can increase application build time.

CAUTION:

Files compiled with option -ipo-jobs or /Qipo-jobs should also be linked with the same option, or the link step may fail.

IDE Equivalent

None

Alternate Options

None

See Also