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<title>Are there limits to MPICH2 Jobs?</title>
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<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>Ibrahim,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>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 size=2 color="#993366" face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:#993366'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>Lester</span></font><o:p></o:p></p>
</div>
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face="Times New Roman"><span style='font-size:12.0pt'>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;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 size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>Thank you Lester and Rajeev for your
feedback.</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>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 size=3 color=blue face="Times New Roman"><span
style='font-size:12.0pt;color:blue'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>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 size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>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 size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>[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 size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>[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 size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>[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 size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>[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 size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>[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 size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>[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 size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>[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 size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>[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 size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>[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 size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>[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 size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>[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 size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>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 size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>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 size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>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 size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Terminated</span></font><font color=blue><span
style='color:blue'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>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 size=3 color=blue face="Times New Roman"><span
style='font-size:12.0pt;color:blue'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 color=blue face="Times New Roman"><span
style='font-size:12.0pt;color:blue'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>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 size=3 color=blue face="Times New Roman"><span
style='font-size:12.0pt;color:blue'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>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 size=3 color=blue face="Times New Roman"><span
style='font-size:12.0pt;color:blue'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>Ibrahim</span></font><font color=blue
face=Arial><span style='font-family:Arial;color:blue'> </span></font><o:p></o:p></p>
</div>
<blockquote style='margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=2 face=Tahoma><span
style='font-size:10.0pt;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 size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>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 size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>Rajeev</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<blockquote style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt;
margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabIndex=-1>
</span></font></div>
<p class=MsoNormal style='margin-bottom:12.0pt'><b><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span style='font-size:10.0pt;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 size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>Ibrahim,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>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 size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>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 size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>Lester</span></font><o:p></o:p></p>
</div>
<div>
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face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabIndex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;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 size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Hello,</span></font>
<o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;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 size=2 face=Arial><span style='font-size:10.0pt;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 size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Your
help would be greatly appreciated.</span></font> <o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Thanks,</span></font>
<br>
<font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Ibrahim
Attieh</span></font> <o:p></o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'><o:p> </o:p></span></font></p>
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