Dear all,<div><br></div><div>i&#39;m tuning collectives of OpenMPI 1.4.2 with OTPO. I have a little question about BTL. This layer is involves just in point-to-point communication or also in collectives routines?</div><div>
<br></div><div>Because i&#39;ve noted that changing some blt parameters like btl_sm_eager_limit and doing one collective routine, performances can have very different behaviour.</div><div><br></div><div>Thanks a lot.<br clear="all">
<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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