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<title>MPI On Cell (Documentation): Groups, Context and Communicators</title>
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<h1>Groups, Context and Communicators<br>
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[<a class="el" href="../../dc/dc0/group__internal__main.html">Developer Documentation</a>]</small>
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Collaboration diagram for Groups, Context and Communicators:</div>
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<center><table><tr><td><img src="../../d1/d0c/group__internal__comm.png" border="0" alt="" usemap="#d5/da7/d1_2d0c_2group____internal____comm_map">
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<area shape="rect" href="../../dc/dc0/group__internal__main.html" title="This section deals with the internal design and functionality." alt="" coords="5,5,173,32"></map></td></tr></table></center>
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At the moment user-defined groups and communicators are not implemented and maybe never will be. Nevertheless user-defined groups and communicators have been taken into consideration while making the software-design (e.g. reserved field for communicator in message-envelope). So it should be not too hard to implement groups and communicators. However a lot of things concerning communicators are hardcoded (e.g. parameter checks).<p>
To save memory only one byte is used to encode the communicator. So if one day user-defined communicators are implemented there are only 256 possible communicators.
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