[mpich-discuss] Memory available to allocate data array

[Qiguo Jing]

Hi there,

I am using a parallel program written in Fortran, which uses a dynamic 
storage allocation approach. The model allocates data storage as needed 
based on numbers of several parameters up to the maximum amount memory 
available on the computer being used. 

However, the parallel program gives an error when allocating data arrays. 
If I change the parameters to reduce the storages which data arrays need, 
the the parallel program has no problem. 

I have a Windows 7 64-bit, Intel i7 2.4GHz, with 4.00 GB (3.88 GB usable) 
RAM. For large size data arrays, I tested 2 to 8 processors (-np 2 or -np 
8), none of them works. The error is
'forrtl: severe (41): insufficient virtual memory'. The same size data 
arrays, if I do a none-parallel run, it works.

I don't know what exactly MPICH2 did when trying to allocate data arrays 
in each processor. Could you please provide me any insights about it, or 
can you help me solve it?

Thansk. 
rank: node: exit code[: error message]

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