Memory Allocation Failure Due to Inappropriate Compiler Flags

From HPCBugBase

Contents 1 Fault Description 2 Statistics (Frequency) 3 Other Findings and Contexts

[edit] Fault Description

On some machines you may not be able to get the full memory unless you compile with the "right" flags. There are also no warning signs that you are running out of memory until it happens. It is easy to fix once you know what the problem but really difficult to identify.

[edit] Statistics (Frequency)

• On IBM SP2, unless you use less-known obscure compilation flags, you only get 200MB per processor without warnings (as opposed to a desired 2GB memory.)

[edit] Other Findings and Contexts

Strictly speaking, an inappropriate choice of compiler flags is not a defect in the code unless, for example, these flags are written in build scripts such as Makefile.