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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Uhmmm, what is “MPI_Free()”?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>It does not appear to be part of the MPI2 standard.
MPI_Free_mem() is part of the standard, but is used in conjunction with
MPI_Alloc_mem() and doesn’t seem to refer to what you are describing
here.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Is it a local procedure and if so, what does it do?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>-bill<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
beowulf-bounces@beowulf.org [mailto:beowulf-bounces@beowulf.org] <b>On Behalf
Of </b>amjad ali<br>
<b>Sent:</b> Saturday, June 26, 2010 4:12 PM<br>
<b>To:</b> Beowulf Mailing List<br>
<b>Subject:</b> [Beowulf] MPI Persistent Comm Question<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Hi all,<br>
<br>
What is the be the best way of using MPI persistent communication in an
iterative/repetative kind of code about calling MPI_Free(); Should we call
MPI_Free() in every iteration or<br>
only once when all the iterations/repetitions are performed?<br>
Means which one is the best out of following two:<br>
<br>
(1)<br>
Call this subroutines 1000 times<br>
=============================<br>
call
MPI_RECV_Init() <br>
call
MPI_Send_Init()<br>
call
MPI_Startall()<br>
call
MPI_Free()<br>
=============================<br>
<br>
(2)<br>
Call this subroutines 1000 times<br>
===========================<br>
call
MPI_RECV_Init() <br>
call
MPI_Send_Init()<br>
call
MPI_Startall()<br>
==========================<br>
call
MPI_Free() --------- call it only once at the end.<br>
<br>
<br>
Thanks in advance.<br>
best regards<br>
AA<br>
<br>
<br>
<o:p></o:p></p>
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