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<DIV dir=ltr align=left><SPAN class=209553421-08092010><FONT face=Arial
color=#0000ff size=2>Eduardo,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=209553421-08092010></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=209553421-08092010><FONT face=Arial
color=#0000ff size=2>I am more familiar with mcnp5 than x but I think this is
still applicable- For using a single machine it is often better to use the
mcnp input variable "tasks 8" (for your situation), rather than going
through mpiexec. So it would look like:</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=209553421-08092010><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=209553421-08092010><FONT face=Arial
color=#0000ff size=2>mcnpx tasks 8 i=filename.i o=filename.o</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=209553421-08092010><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=209553421-08092010><FONT face=Arial
color=#0000ff size=2>If the executable has been built for threading..if it bombs
with the error "multiprocessing is unavailable in this compilation", you will
need to rebuild it for OMP (if you have the source files). Hope this is
helpful-</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=209553421-08092010><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=209553421-08092010><FONT face=Arial
color=#0000ff size=2>Dave</FONT></SPAN></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> mpich-discuss-bounces@mcs.anl.gov
[mailto:mpich-discuss-bounces@mcs.anl.gov] <B>On Behalf Of </B>Padilla, Eduardo
Antonio<BR><B>Sent:</B> Wednesday, September 08, 2010 5:13 PM<BR><B>To:</B>
mpich-discuss@mcs.anl.gov<BR><B>Subject:</B> [mpich-discuss] Suppressed
Output<BR></FONT><BR></DIV>
<DIV></DIV><FONT face="Calibri, sans-serif" size=2>
<DIV>All,</DIV>
<DIV>I recently installed the current version of MPICH2 1.2.1p1 on a 32-bit XP
Pro machine with 8 cores (the machine is 64-bit but the OS is 32). I’m trying to
run MCNPX threading all 8 cores. My command line is as follows: </DIV>
<DIV>mpiexec –localonly 8 mcnpx i=filename…</DIV>
<DIV> </DIV>
<DIV>This ran great exactly twice. However, now when I run it I see MCNPX start
up normally, create the initial files and then:</DIV>
<DIV>Dynamic storage = 0 words, 0 bytes. Cp0 = 0.00</DIV>
<DIV>Master starting 7 by 1 subtasks 09/03/10 (time)</DIV>
<DIV>Master sending static commons…</DIV>
<DIV>Master sending dynamic commons…</DIV>
<DIV>Master completed initialization broadcasts.</DIV>
<DIV>Rendezvous at nps = 1000 # of microtasks = 7 (date time – this is MCNPX
language here)</DIV>
<DIV>Rendezvous at nps =***************** of microtasks = 7 (date time – this is
MCNPX talk but confusing to me)</DIV>
<DIV> </DIV>
<DIV>At this point, all 8 cores are running full bore in task manager, but the
process gets hung up. The output files are never written or updated (data dumps
don’t occur). When I run based on a set number of particle histories (not based
on cpu time), the process seems to work fine. I assume a simple setting got
changed somewhere?</DIV>
<DIV>Regards,</DIV>
<DIV>Eduardo Padilla</DIV>
<DIV>Sandia National Labs</DIV>
<DIV> </DIV></FONT></BODY></HTML>