<meta http-equiv="Content-Type" content="text/html; charset=utf-8"><div dir="ltr"><div>You are absolutely right.</div><div>But some engineer designed to execute another application on computer while system is in ready state.</div><div>This application executed only when my application in ready state.</div><div>I'm not familiar with the reason, but currently this is a situation.</div><div>One more question:</div><div>My application designed not by me, then I can't explain you design reason for the solution.</div><div>I have number of communicators which are cloned from MPI_COMM_WORLD. I execute on each communicator MPI_Waitany on separate thread. The data mostly arrives on single communicator only, but other threads are just waiting. I mean that single thread is actually working with MPI, others are on busy wait. Do I have polling penalty in this case? </div><div><br></div><div>Regards,</div><div>Anatoly.</div><div><br><div><br></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Sep 23, 2014 at 4:49 PM, Rob Latham <span dir="ltr"><<a href="mailto:robl@mcs.anl.gov" target="_blank">robl@mcs.anl.gov</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=""><br>
<br>
On 09/23/2014 09:38 AM, Wesley Bland wrote:<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Out of curiosity, what is the issue with using 100% of the CPU? If<br>
you’re not using it for your application (which it appears that you<br>
aren’t since you’re calling MPI_Wait), what difference does it make if<br>
MPI uses all of it?<br>
</blockquote>
<br></span>
power consumption, I'd imagine.<span class="HOEnZb"><font color="#888888"><br>
<br>
==rob<br>
<br>
-- <br>
Rob Latham<br>
Mathematics and Computer Science Division<br>
Argonne National Lab, IL USA</font></span><div class="HOEnZb"><div class="h5"><br>
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