segmentation fault with openmp, how do i increase stack size?

[gregkaplan]

i am using intel fortran 11.059 on mac os 10.5.6.

when i compile without openmp, my program runs fine. it also runs fine on linux and windows. however when i compile with openmp on mac i get a segmentation fault at run time.

after reading previous posts, i am pretty sure that i need to increase the stack size available to the multi-threaded parts of the program, because my programs uses a number of large arrays. when i use the -heap-arrays option, i get the same segmentation fault. my question is: how do i increase the relevant stack size?? the -stack_size option doesnt work, so what is the correct compiler directive for increasing the stack size on a mac? and is this the cause of the problem?

[Izaak_Beekman]

Quoting - gregkaplan

i am using intel fortran 11.059 on mac os 10.5.6.

when i compile without openmp, my program runs fine. it also runs fine on linux and windows. however when i compile with openmp on mac i get a segmentation fault at run time.

after reading previous posts, i am pretty sure that i need to increase the stack size available to the multi-threaded parts of the program, because my programs uses a number of large arrays. when i use the -heap-arrays option, i get the same segmentation fault. my question is: how do i increase the relevant stack size?? the -stack_size option doesnt work, so what is the correct compiler directive for increasing the stack size on a mac? and is this the cause of the problem?

I beleive on a mac you can issue:

ulimit -s hard

from a bash command-line. In linux i usually do:

ulimit -s unlimited

see: http://homepage.mac.com/eric.c/hpc/contents/documentation/How%20to%20increase%20the%20stack%20size%20on%20Mac%20OS%20X.pdf

Hope this helps.
-Z