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From: Richard Graham (rlgraham_at_[hidden])
Date: 2007-05-28 22:42:56


Tahir,
  There are a variety of ways to create shared memory segments. I am not a
 Fortran expert, but do believe this is something that needs to be done from
c/c++.
 In Open MPI we use the mmap set of routines to create the shared memory
segments
 we use.

Rich

On 5/28/07 10:21 PM, "Tahir Malas" <tmalas_at_[hidden]> wrote:

>
>> > There is nothing preventing you from creating your own shared memory
>> > segment
>> > for use by your application. This does not impact the MPI implementation.
>> > You need to make sure you take care of all the issues associated with
>> > multiple procs/threads accessing the same cache lines, which can cause
>> > quite
>> > a bit of performance degradation, if not managed.
>> >
>> > Rich
>> >
>
>
> How can we create "our own shared memory segment?" Do you mean Linux System
> calls? I see shmget routine, for example, but it is a C routine. Do we have
> to write a fortran interface to use it?
> Tahir.
>
>
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