Re: synchronisation between two executable

rudra wrote:

On Mar 5, 7:30 pm, Luka Djigas <ldigas@@gmail.com> wrote:


Why not use a batch file for just putting them in a loop ? What is the
stopping condition ?

-- Luka

to Luka,
you are right. the stopping condition is convergence of some quantity.

Luka's suggestion is good, except I would call it a shell script rather
than a batch file. (Are we talking about the same thing? What kind of
system?)

The shell script guarantees the the output file(a) from a.out are
completely written and closed properly, before b.out tries to start
reading them, and vice versa. This seems like a trivial thing, except
that if programs A and B are running simultaneously, the file completion
and signalling issues might get messy in Fortran. The shell script
treats you "nice". Mainly because it was designed for things like this!

The stopping condition would be detected by one of the Fortran programs,
right? So you need a method for that program to signal the shell script
to terminate the loop. I can think of several: special keyword to
standard out; completion file made only upon convergence; grep for
completion keyword in normal output file; set an environment variable;
set the exit code, if available.

Does this take care of it, or are you trying to do something more
special?

--Dave
.

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