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<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=428233921-08052008>Lester,</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=428233921-08052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=428233921-08052008>I do
not think the RAM is the issue because we are using CPUs with 16 GB
RAM.</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=428233921-08052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=428233921-08052008>It
could be some limitation within MCNP or some other
parameter.</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=428233921-08052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=428233921-08052008>Thank
you for your help.</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=428233921-08052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=428233921-08052008>Ibrahim</SPAN></FONT></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
owner-mpich-discuss@mcs.anl.gov [mailto:owner-mpich-discuss@mcs.anl.gov]<B>On
Behalf Of </B>Cavey, Lester<BR><B>Sent:</B> May 8, 2008 11:10 AM<BR><B>To:</B>
mpich-discuss@mcs.anl.gov<BR><B>Subject:</B> RE: [mpich-discuss] Are there
limits to MPICH2 Jobs?<BR><BR></FONT></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Ibrahim,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">As far as the stack
goes, you could buy more RAM memory, if it is not too expensive, and your
machine can upgrade to more RAM. Our test machines only allowed us to
upgrade to 4 GB of RAM. The upgrade wasn't too expensive, and it let us
run bigger jobs. It just depends on what type of machine you
have.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=#993366 size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: #993366; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<DIV>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Lester</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<DIV class=MsoNormal style="TEXT-ALIGN: center" align=center><FONT
face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">
<HR tabIndex=-1 align=center width="100%" SIZE=2>
</SPAN></FONT></DIV>
<P class=MsoNormal><B><FONT face=Tahoma size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT
face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">
owner-<st1:PersonName w:st="on">mpich-discuss@mcs.anl.gov</st1:PersonName>
[mailto:owner-<st1:PersonName
w:st="on">mpich-discuss@mcs.anl.gov</st1:PersonName>] <B><SPAN
style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Attieh, Ibrahim<BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> Thursday, May 08, 2008 10:27
AM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> <st1:PersonName
w:st="on">mpich-discuss@mcs.anl.gov</st1:PersonName><BR><B><SPAN
style="FONT-WEIGHT: bold">Subject:</SPAN></B> RE: [mpich-discuss] Are there
limits to MPICH2 Jobs?</SPAN></FONT><o:p></o:p></P></DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P>
<DIV>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Thank you Lester and
Rajeev for your feedback.</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">We change the stack
size to unlimited. We were able to run a 4.4 GB job. However, when
we tried to run a 6.7 GB job we got the following
error:</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" color=blue size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: blue"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">master sending
static commons...</SPAN></FONT><FONT color=blue><SPAN
style="COLOR: blue"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">master sending
dynamic commons...</SPAN></FONT><FONT color=blue><SPAN
style="COLOR: blue"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">[pe:0] **DOTCOMM
Error** DOTCOMMI_PACK (dotcommi_pack.c:104[!(( dotcommp_sbuf.data != ((void
*)0) ))]) (alloc(dotcommp_sbuf.data)) (1917782060)</SPAN></FONT><FONT
color=blue><SPAN style="COLOR: blue"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">[pe:0] **DOTCOMM
Error** DOTCOMMI_PACK (dotcommi_pack.c:104[!(( dotcommp_sbuf.data != ((void
*)0) ))]) (alloc(dotcommp_sbuf.data)) (1891740044)</SPAN></FONT><FONT
color=blue><SPAN style="COLOR: blue"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">[pe:0] **DOTCOMM
Error** DOTCOMMI_PACK (dotcommi_pack.c:104[!(( dotcommp_sbuf.data != ((void
*)0) ))]) (alloc(dotcommp_sbuf.data)) (1871790948)</SPAN></FONT><FONT
color=blue><SPAN style="COLOR: blue"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">[pe:0] **DOTCOMM
Error** DOTCOMMI_PACK (dotcommi_pack.c:104[!(( dotcommp_sbuf.data != ((void
*)0) ))]) (alloc(dotcommp_sbuf.data)) (1871396372)</SPAN></FONT><FONT
color=blue><SPAN style="COLOR: blue"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">[pe:0] **DOTCOMM
Error** DOTCOMMI_PACK (dotcommi_pack.c:104[!(( dotcommp_sbuf.data != ((void
*)0) ))]) (alloc(dotcommp_sbuf.data)) (1871396340)</SPAN></FONT><FONT
color=blue><SPAN style="COLOR: blue"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">[pe:0] **DOTCOMM
Error** DOTCOMMI_PACK (dotcommi_pack.c:104[!(( dotcommp_sbuf.data != ((void
*)0) ))]) (alloc(dotcommp_sbuf.data)) (1858966996)</SPAN></FONT><FONT
color=blue><SPAN style="COLOR: blue"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">[pe:0] **DOTCOMM
Error** DOTCOMMI_PACK (dotcommi_pack.c:104[!(( dotcommp_sbuf.data != ((void
*)0) ))]) (alloc(dotcommp_sbuf.data)) (1777645156)</SPAN></FONT><FONT
color=blue><SPAN style="COLOR: blue"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">[pe:0] **DOTCOMM
Error** DOTCOMMI_PACK (dotcommi_pack.c:104[!(( dotcommp_sbuf.data != ((void
*)0) ))]) (alloc(dotcommp_sbuf.data)) (1777447868)</SPAN></FONT><FONT
color=blue><SPAN style="COLOR: blue"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">[pe:0] **DOTCOMM
Error** DOTCOMMI_PACK (dotcommi_pack.c:104[!(( dotcommp_sbuf.data != ((void
*)0) ))]) (alloc(dotcommp_sbuf.data)) (1777250572)</SPAN></FONT><FONT
color=blue><SPAN style="COLOR: blue"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">[pe:0] **DOTCOMM
Error** DOTCOMMI_PACK (dotcommi_pack.c:104[!(( dotcommp_sbuf.data != ((void
*)0) ))]) (alloc(dotcommp_sbuf.data)) (1777250568)</SPAN></FONT><FONT
color=blue><SPAN style="COLOR: blue"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">[cli_0]: aborting
job:</SPAN></FONT><FONT color=blue><SPAN
style="COLOR: blue"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">Fatal error in
MPI_Bcast: Invalid buffer pointer, error stack:</SPAN></FONT><FONT
color=blue><SPAN style="COLOR: blue"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">MPI_Bcast(784):
MPI_Bcast(buf=(nil), count=1855241236, MPI_BYTE, root=0, comm=0x84000000)
failed</SPAN></FONT><FONT color=blue><SPAN
style="COLOR: blue"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">MPI_Bcast(735): Null
buffer pointer</SPAN></FONT><FONT color=blue><SPAN
style="COLOR: blue"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">Terminated</SPAN></FONT><FONT
color=blue><SPAN style="COLOR: blue"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">Signal Received,
exiting ...</SPAN></FONT><FONT color=blue><SPAN
style="COLOR: blue"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" color=blue size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: blue"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" color=blue size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: blue"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Are
there parameters in the environment that we need to change o ther
than the stack limit?</SPAN></FONT><FONT color=blue><SPAN
style="COLOR: blue"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" color=blue size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: blue"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Your feedback
is appreciated.</SPAN></FONT><FONT color=blue><SPAN
style="COLOR: blue"><o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" color=blue size=3><SPAN
style="FONT-SIZE: 12pt; COLOR: blue"> <o:p></o:p></SPAN></FONT></P></DIV>
<DIV>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Ibrahim</SPAN></FONT><FONT
face=Arial color=blue><SPAN
style="COLOR: blue; FONT-FAMILY: Arial"> </SPAN></FONT><o:p></o:p></P></DIV>
<BLOCKQUOTE style="MARGIN-TOP: 5pt; MARGIN-BOTTOM: 5pt; MARGIN-RIGHT: 0in">
<P class=MsoNormal style="MARGIN-BOTTOM: 12pt"><FONT face=Tahoma
size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">-----Original
Message-----<BR><B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B>
owner-<st1:PersonName w:st="on">mpich-discuss@mcs.anl.gov</st1:PersonName>
[mailto:owner-<st1:PersonName
w:st="on">mpich-discuss@mcs.anl.gov</st1:PersonName>]<B><SPAN
style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Rajeev Thakur<BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> May 3, 2008 8:49 PM<BR><B><SPAN
style="FONT-WEIGHT: bold">To:</SPAN></B> <st1:PersonName
w:st="on">mpich-discuss@mcs.anl.gov</st1:PersonName><BR><B><SPAN
style="FONT-WEIGHT: bold">Subject:</SPAN></B> RE: [mpich-discuss] Are there
limits to MPICH2 Jobs?</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Nothing in MPICH2
should prevent the job from running on > 2GB memory. The problem is
likely to be in the environment running MPICH2, such as the stack size
limit Lester mentions.</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Rajeev</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"> <o:p></o:p></SPAN></FONT></P>
<BLOCKQUOTE
style="BORDER-RIGHT: medium none; PADDING-RIGHT: 0in; BORDER-TOP: medium none; PADDING-LEFT: 4pt; PADDING-BOTTOM: 0in; MARGIN: 5pt 0in 5pt 3.75pt; BORDER-LEFT: blue 1.5pt solid; PADDING-TOP: 0in; BORDER-BOTTOM: medium none">
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P>
<DIV class=MsoNormal style="TEXT-ALIGN: center" align=center><FONT
face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">
<HR tabIndex=-1 align=center width="100%" SIZE=2>
</SPAN></FONT></DIV>
<P class=MsoNormal style="MARGIN-BOTTOM: 12pt"><B><FONT face=Tahoma
size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT
face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">
owner-<st1:PersonName w:st="on">mpich-discuss@mcs.anl.gov</st1:PersonName>
[mailto:owner-<st1:PersonName
w:st="on">mpich-discuss@mcs.anl.gov</st1:PersonName>] <B><SPAN
style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Cavey,
Lester<BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Saturday,
May 03, 2008 3:33 PM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B>
<st1:PersonName
w:st="on">mpich-discuss@mcs.anl.gov</st1:PersonName><BR><B><SPAN
style="FONT-WEIGHT: bold">Subject:</SPAN></B> RE: [mpich-discuss] Are
there limits to MPICH2 Jobs?</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Ibrahim,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">I'm not an expert
on this, but we used the ulimit command, in our bash rc files, to increase
our stack size limit. Then our 32-bit linux system was able iterate
through more loops while running our application (a particle-in-cell
simulator). Eventually though there was a limit to the number of
loops that ran, before a "segmentation fault" was reported. In our
case, this meant we had a stack overflow, since there is always going to
be a maximum stack size that can not be
exceeded.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">I'm sure the ANL
guys can give you more advice, besides just trying the ulimit
command.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<DIV>
<P class=MsoNormal><FONT face=Arial color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Arial">Lester</SPAN></FONT><o:p></o:p></P></DIV>
<DIV>
<DIV class=MsoNormal style="TEXT-ALIGN: center" align=center><FONT
face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">
<HR tabIndex=-1 align=center width="100%" SIZE=2>
</SPAN></FONT></DIV>
<P class=MsoNormal><B><FONT face=Tahoma size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT
face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">
owner-<st1:PersonName w:st="on">mpich-discuss@mcs.anl.gov</st1:PersonName>
[mailto:owner-<st1:PersonName
w:st="on">mpich-discuss@mcs.anl.gov</st1:PersonName>] <B><SPAN
style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Attieh,
Ibrahim<BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Saturday,
May 03, 2008 12:03 PM<BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B>
<st1:PersonName
w:st="on">mpich-discuss@mcs.anl.gov</st1:PersonName><BR><B><SPAN
style="FONT-WEIGHT: bold">Subject:</SPAN></B> [mpich-discuss] Are there
limits to MPICH2 Jobs?</SPAN></FONT><o:p></o:p></P></DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P>
<P><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Hello,</SPAN></FONT>
<o:p></o:p></P>
<P><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">We are trying to run the Monte
Carlo code MCNP with MPICH2. However, we are having problems with
jobs bigger than 2 gigabytes. The jobs we want to run are as big as 9
gigabytes. We are running the jobs on a linux system with 64-bit
operating system.</SPAN></FONT><o:p></o:p></P>
<P><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Are there any limits to the
size of the files that MPICH2 could handle? Are there any options
that we need to set for MPICH2 to handle such large
jobs?</SPAN></FONT><o:p></o:p></P>
<P><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Your help would be greatly
appreciated.</SPAN></FONT> <o:p></o:p></P>
<P><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Thanks,</SPAN></FONT>
<BR><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Ibrahim Attieh</SPAN></FONT>
<o:p></o:p></P>
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