Dear all,<div><br></div><div>i&#39;m studing the interfaces of new collective routines in next MPI-3, and i&#39;ve read that new collectives haven&#39;t any tag. </div><div><br></div><div>So all collective operations must follow the ordering rules for collective calls.</div>
<div><br></div><div>From what i understand, this means that i can&#39;t use:</div><div><br></div><div>MPI_IBcast(MPI_COMM_WORLD, request_1) // first Bcast</div><div>MPI_IBcast(MPI_COMM_WORLD, request_2) // second Bcast</div>
<meta http-equiv="content-type" content="text/html; charset=utf-8"><div><br></div><div>but is it possible to do this:</div><div><br></div><div>MPI_IBcast(MPI_COMM_WORLD, request_1) // first Bcast</div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div>
MPI_IReducet(MPI_COMM_WORLD, request_2) // othwer collective</div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div><br></div><div>In other words, i can&#39;t overlap the same collective more time on one communicator, but is it possible with different collectives?</div>
<div><br></div><div>Thanks a lot.</div><div><br></div><div><br></div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div><br></div><div><br><br>-- <br>Ing. Gabriele Fatigati<br><br>Parallel programmer<br>
<br>CINECA Systems &amp; Tecnologies Department<br><br>Supercomputing Group<br><br>Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy<br><br><a href="http://www.cineca.it">www.cineca.it</a>                    Tel:   +39 051 6171722<br>
<br>g.fatigati [AT] <a href="http://cineca.it">cineca.it</a>           <br>
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