Developer Guide and Reference

Contents

Profile Guided Optimization dialog box

This topic has information on the following dialog boxes:
  • Profile Guided Optimization (PGO)
    dialog box
  • Application Invocations
    dialog box
  • Edit Command
    dialog box
  • Command
    dialog box

Profile Guided Optimization dialog box

To access the
Profile Guided Optimization
dialog box, choose
Tools
Intel Compiler
Profile Guided Optimization
.
Use the
Profile Guided Optimization
dialog box to set the options for profile guided optimization.
Phase 1 - Instrument:
This phase produces an instrumented object file for the profile guided optimization. The command line compiler option for each optimization instrument you choose appears in
Compiler Options
.
  • Enable Function Ordering in the optimized application:
    Select this checkbox to enable ordering of static and extern routines using profile information. This optimization specifies the order in which the linker should link the functions of your application. This optimization can improve your application performance by improving code locality and by reducing paging.
  • Enable Static Data Layout in the optimized application:
    Select this checkbox to enable ordering of static global data items based on profiling information. This optimization specifies the order in which the linker should link global data of your program. This optimization can improve application performance by improving the locality of static global data, reduce paging of large data sets, and improve data cache use.
  • Instrument with guards for threaded application:
    Select this checkbox to produce an instrumented object file that includes the collection of PGO data on applications that use a high level of parallelism.
Selecting an option produces a static profile information file (
.spi
), but also increases the time needed to do a parallel build.
Deselect the checkbox to skip this phase to save time running profile guided optimization. When you skip this phase, you use the existing profile information when running profile guided optimization. For example, you may want to skip this phase when you change the code to fix a bug and the fix doesn't affect the architecture of the project.
Phase 2 - Run Instrumented Application(s):
This phase runs the instrumented application produced in the previous phase as well as other applications in the
Applications Invocations
dialog box. To add a new application or edit an existing application in the list, click
Applications Invocations
.
Deselect the checkbox to skip this phase to save time running profile guided optimization. When you skip this phase, you do not run the applications in the list when running profile guided optimization. For example, you might want to skip this phase when you change the code to fix a bug and the fix doesn't affect the architecture of the project.
Phase 3 - Optimize with Profile Data:
This phase performs the profile guided optimization.
Deselect the checkbox to skip this phase.
Profile Directory:
The directory that contains the profile. Click
Edit
to edit the profile directory or the
Browse
button to browse for the profile directory.
Show this dialog next time:
Deselect this checkbox to run profile guided optimization without displaying this dialog box. The profile guided optimization will use these settings.
Save Settings:
Click to save your settings.
Run:
Click to start the profile guided optimization.
Cancel:
Click to close this dialog box without starting the profile guided optimization.

Application Invocations dialog box

To access the
Application Invocations
dialog box, click
Application Invocations...
in the
Profile Guided Optimization
dialog box. Use the
Profile Guided Optimization
dialog box to configure the application options for your application as well add additional applications when you run profile guided optimization.
The list of applications comes from the debug settings of the
Startup Project
.
Merge Environment:
Select this checkbox to merge the application environment with the environment defined by the operating system.
To add, edit, or remove an application, click one of the buttons.
Add:
Click to add a new application in the
Edit Command
dialog box.
Duplicate:
Click after selecting an application to copy its settings so that you can use a different setting.
Edit:
Click after selecting an application to change its settings in the
Edit Command
dialog box.
Delete:
Click to remove the selected application from the list.
OK:
Click to save the settings and close this dialog box.
Cancel:
Click to discard the settings and close this dialog box.

Edit Command dialog box

To access the
Edit Command
dialog box, click
Add
or
Edit
in the
Application Invocations
dialog box. Use the
Edit Command
dialog box to add a new or edit an existing application in the
Application Invocations
dialog box.
Command:
Add a new or edit an existing application. Click
Edit
to open the
Command
dialog box with a list of macros. Click
Browse
to navigate to another directory that contains the application.
Command Arguments:
Enter the arguments required by the application.
Working Directory:
Enter a new or edit the working directory for the application. Click
Edit
to open the
Command
dialog box with a list of macros. Click
Browse
to navigate to working directory of the application.
Environment:
Enter the environment variable required by this application.
Merge Environment:
Select this checkbox to merge the application environment with the environment defined by the operating system.
Load from Debugging Settings:
Click to load the debug settings for this application.
OK:
Click to save the settings and close this dialog box.
Cancel:
Click to discard the settings and close this dialog box.

Command dialog box

To access the
Command
dialog box, click
Edit
in the
Edit Command
dialog box. Use the
Command
dialog box to specify or change the macro used in the application to run as part of the profile guided optimization.
Select a macro from the list and then click one of the buttons.
Macro:
Click to show or close the list of available macros.
Insert:
Click to use the selected macro.
OK:
Click to save the settings and close this dialog box.
Cancel:
Click to discard the settings and close this dialog box.

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804