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<DIV dir=ltr align=left><SPAN class=316044917-09032006><FONT face=Arial
color=#0000ff size=2>That might be a property of the application you are
running. If you run some other MPI program, such as the examples and tests in
MPICH2, you might find that to not be the case.</FONT></SPAN></DIV>
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color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=316044917-09032006><FONT face=Arial
color=#0000ff size=2>Rajeev</FONT></SPAN></DIV><BR>
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<FONT face=Tahoma size=2><B>From:</B> Galton, Simon [mailto:galtons@aecl.ca]
<BR><B>Sent:</B> Thursday, March 09, 2006 10:11 AM<BR><B>To:</B> 'Rajeev
Thakur'<BR><B>Cc:</B> mpich-discuss@mcs.anl.gov<BR><B>Subject:</B> RE: [MPICH]
FW: Mpich2 submission question.<BR></FONT><BR></DIV>
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<P><FONT size=2>Sure,</FONT> </P>
<P><FONT size=2>This may be specific to the program I'm running, MCNP, but
when you run</FONT> </P>
<P><FONT size=2>mpiexec -n 2 mcnp5</FONT> </P>
<P><FONT size=2>what you see is that two processes are created on the
cluster. The first process accumulates no cpu, the second runs
normally. The result is accurate.</FONT></P>
<P><FONT size=2>As you continue to add CPUs nothing changes -- the first
process is always "idle". If you specifiy -n 1 however, the first
process is "active".</FONT></P>
<P><FONT size=2>Any thoughts?</FONT> <BR><FONT size=2>Simons </FONT></P>
<P><FONT size=2>-----Original Message-----</FONT> <BR><FONT size=2>From:
Rajeev Thakur [<A
href="mailto:thakur@mcs.anl.gov">mailto:thakur@mcs.anl.gov</A>]
</FONT><BR><FONT size=2>Sent: March 7, 2006 5:51 PM</FONT> <BR><FONT
size=2>To: galtons@aecl.ca</FONT> <BR><FONT size=2>Cc:
mpich-discuss@mcs.anl.gov</FONT> <BR><FONT size=2>Subject: RE: [MPICH] FW:
Mpich2 submission question.</FONT> </P>
<P><FONT size=2>Can you explain what you mean with an example? For example, if
you are running the cpi example from the examples directory, with "mpiexec -n
2 cpi"</FONT></P>
<P><FONT size=2>Rajeev </FONT></P>
<P><FONT size=2>> From: "Galton, Simon" <galtons@aecl.ca></FONT>
<BR><FONT size=2>> Subject: Mpich2 submission question.</FONT> <BR><FONT
size=2>> Date: Tue, 7 Mar 2006 09:46:02 -0500</FONT> <BR><FONT size=2>>
</FONT><BR><FONT size=2>> Howdy, folks.</FONT> <BR><FONT size=2>>
</FONT><BR><FONT size=2>> I've been scouring the mpich2 documentation, and
I've read over the </FONT><BR><FONT size=2>> source code, and I seem to be
missing something, somewhere... :)</FONT> <BR><FONT size=2>>
</FONT><BR><FONT size=2>> I notice that when you submit an mpich2 job, the
first process </FONT><BR><FONT size=2>> accumulates no CPU (unless you
submit a 1-cpu job). I expect it's </FONT><BR><FONT size=2>> just a
control process.</FONT> <BR><FONT size=2>> </FONT><BR><FONT size=2>> Is
there anything I can do to make this an "active" process?</FONT> <BR><FONT
size=2>> </FONT><BR><FONT size=2>> Simon</FONT> </P><BR><BR>
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