New submission from Sébastien Sablé <sa...@users.sourceforge.net>:
On AIX, executables are compiled by default so that they cannot allocate more than 256MB of memory. This is not enough in some cases; for example this is not enough to get the Python test suite to run completely. As explained in IBM documentation: By default each program gets one segment register (see 2.24) for its data segment. As each segment register covers 256 MB, any calls to malloc more will fail. Also programs that declare large global or static arrays may fail to load. To allocate more segment registers to your program, use the linker option -bmaxdata to specify the number of bytes you need in the data segment as follows: cc -o myprog -bmaxdata:0x20000000 myprog.c The example above would allocate an additional segment register to allow for 512MB of data. export LDR_CNTRL=MAXDATA=0x20000000 start_process unset LDR_CNTRL Marking An Executable For Large Page Use The XCOFF header in an executable file contains a new flag to indicate that the program wants to use large pages to back its data and heap segments. This flag can be set when the application is linked by specifying the -blpdata option on the ld command. The flag can also be set or cleared using the ldedit command. The "ldedit -blpdata filename" command sets the large page data/heap flag in the specified file. The "ldedit -bnolpdata filename" clears the large page flag. The ldedit command may also be used to set an executable's maxdata value ---------- components: Build messages: 128553 nosy: sable priority: normal severity: normal status: open title: Python memory limit on AIX versions: Python 3.2 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue11212> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
