3.6. Large page support

Historically, AIX supported 4 KB page size only. Starting with AIX 5L Version 5.1 plus 5100-02 Recommended Maintenance Level, AIX supports alternate page size (called large pages), in addition to the traditional 4 KB page size. The large page size on systems using the POWER4 processor is 16 MB, but the large page size may be different size on future architectures. It is recommended to call the sysconf() routine with the _SC_LARGE_PAGESIZE parameter in your applications, in order to determine the supported large page size.

To verify you are using POWER4 processor systems, run the lscfg -vpl procX command, where X is the instance number of processors. The following example shows the output of this command executed on an ...

Get Developing and Porting C and C++ Applications on AIX now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.