[MPI3 Fortran] Fortran extra_state argument to MPIattributefunctions
jimxia at ca.ibm.com
Thu May 28 12:37:54 CDT 2009
mpi3-fortran-bounces at lists.mpi-forum.org wrote on 05/28/2009 01:17:13 PM:
> Besides the more formal methods mentioned by Aleks below, there is a
> common programming style approach to solve this problem: put the
> variable extra in a module. The compiler has to assume that any
> non-intrinsic procedure reference might access the module, and hence
> access or modify the variable. This technique generally avoids
> performance hits that might be associated with some others -
Using module variables is a nice way to go. But I don't think that solves
all the aliasing problems.
> particular, the VOLATILE attribute can shut down almost all optimization
> for a variable.
Where did you get that idea from? Does anything associated (any kind of
association) with this variable also inherit VOLATILE? I don't see
VOLATILE being a viable solution.
Also to Aleks: We've discussed this TARGET attribute for too long. Let's
agree to disagree :-).
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email: jimxia at ca.ibm.com
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