HP MLIB for Itanium Linux Version 9.6 Release Note

Known Problems and Workarounds

HP MLIB for Itanium Linux Version 9.6 Release Note14

$ FORTRAN_FILE_IO_SUPPORT =1,

$ C_FILE_IO_SUPPORT =2)

mlib_file_io_support = FORTRAN_FILE_IO_SUPPORT

return

end

subroutine mlib_io_msg( output, s)

character*(*) s

integer output

write (output,*) s

return

end

As of this release, HP MLIB for Itanium® Linux does not support Fortran file manipulation

operations.

Default OpenMP library stack is too small for MLIB

Intel extensions to OpenMP set each parallel thread's size to a default size of 4 MB. For

performance reasons, several subprograms in HP MLIB use the stack for temporary arrays

that exceed the default value. Using the default thread stack size, these routines overwrite

neighboring stacks, resulting in errors that are difficult to diagnose.

The solution is to change the thread size attribute to a value that is large enough to

accommodate all the MLIB subprograms the thread may encounter. Currently, 8 MB should

be sufficient for all MLIB subprograms.

The environment variable KMP_STACKSIZE can accept values in bytes, kilobytes, megabytes,

gigabytes, or terabytes using the optional suffixes b, k, m, g, or t respectively. Set the size as

follows:

For C-like shells:

% setenv KMP_STACKSIZE 8m

For Korn-like shells:

% export KMP_STACKSIZE=8m

Incorrect math library link order for the Intel Fortran compiler

HP MLIB strongly recommends that the -lm option never be used on the command line with

the Intel Fortran compiler. When the Intel Fortran compiler is used to invoke the link phase,

the compiler will automatically insert appropriate clauses to link in libimf.(a,so) and

libm.(a,so), in that order.