Category
Pragma equivalent
None.
Purpose
Takes advantage of large pages provided on POWER4 and higher systems, for applications designed to execute in a large page memory environment.
When -qlargepage is in effect to compile a program designed for a large page environment, an increase in performance can occur.
Defaults
-qnolargepage
Usage
Note that this option is only useful
in the following conditions:
- Large pages must be available and configured on the system.
- You must compile with an option that enables loop optimization, such as -O3 or -qhot.
- You must link with the -blpdata option.
See your AIX® operating system documentation for more information on using large page support.
Predefined macros
None.
Examples
To compile myprogram.c to
use large page heaps, enter:
xlc myprogram.c -qlargepage -blpdata