<meta http-equiv="Content-Type" content="text/html; charset=utf-8"><div dir="ltr"><div><div>Pavan, thank you for your reply. I will try to find out from the sources as you suggested.<br><br></div>Regards,<br></div>Khalid<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Mar 2, 2015 at 1:38 AM, Balaji, Pavan <span dir="ltr"><<a href="mailto:balaji@anl.gov" target="_blank">balaji@anl.gov</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
BG/P is such an ancient machine, that we don't even remember anymore, unfortunately.<br>
<br>
You might be able to pull out the old releases of mpich (the ones where there used to be a dcmfd device in the src/mpid directory), and check.<br>
<br>
-- Pavan<br>
<div><div class="h5"><br>
> On Mar 1, 2015, at 6:36 PM, Khalid Hasanov <<a href="mailto:xalid.h@gmail.com">xalid.h@gmail.com</a>> wrote:<br>
><br>
> Hello,<br>
><br>
> First of all, I am not sure if this group is the right place for this question. If not I apologize for asking unrelated question.<br>
><br>
> I read two papers about optimizing MPI collective communications on BG/L and BG/P.<br>
> (Optimization of MPI Collective Communication on BlueGene/L Systems<br>
> and MPI Collective Communications on The Blue Gene/P Supercomputer: Algorithms and Optimizations respectively). However, these two papers do not mention anything about MPI scatter and gather operations, I wonder if these two collective operations have been optimized for BlueGene or they use exactly the same algorithms from MPICH. Any reference appreciated.<br>
><br>
><br>
> Best regards,<br>
> Khalid<br>
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<br>
--<br>
Pavan Balaji ✉️<br>
<a href="http://www.mcs.anl.gov/~balaji" target="_blank">http://www.mcs.anl.gov/~balaji</a><br>
<br>
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