Generating and Using a Mapfile

Related Topics:

Selecting Load Objects to Display Information About

Choosing the Metrics Displayed and the Sort Order

Using the data from the experiment, the Performance Analyzer can generate a mapfile you can use with the static linker (ld) to create an executable with a smaller working-set size, more effective I-cache behavior, or both.

To create the mapfile:

1. Use the Function List Metrics Dialog Box to choose a sort metric.

When you relink your program using the mapfile, the order in which the routines are loaded is determined by the Function List sort order, which is recorded in the mapfile.

2. Choose Experiment Create Mapfile.

The Create Mapfile Dialog Box appears.

3. Use the directory pane, if necessary, to navigate to the directory where you want to store the mapfile.

4. If you want, you can use the Name text box to:

• Change the file filter, to display the name of an existing file and select it for overwriting

• Type in a path and file name for the mapfile that are different from the default

5. In the Select Load Object list box, select the load object for which you want to generate the map file (this is usually your program segment).

6. Click OK.

To reorder your program:

1. Recompile your program using the -xF option, which causes the compiler to generate functions that can be relocated independently.

2. Link your object files using the -M mapfile-name option, where mapfile-name is the name of the mapfile you created.