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<DIV dir=ltr align=left><SPAN class=656584314-15032010><FONT color=#0000ff
size=2 face=Arial>Can you send us a small example program that
fails?</FONT></SPAN></DIV><BR>
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<FONT size=2 face=Tahoma><B>From:</B> mpich-discuss-bounces@mcs.anl.gov
[mailto:mpich-discuss-bounces@mcs.anl.gov] <B>On Behalf Of </B>Bruce
Wu<BR><B>Sent:</B> Monday, March 15, 2010 2:10 AM<BR><B>To:</B>
mpich-discuss@mcs.anl.gov<BR><B>Subject:</B> Re: [mpich-discuss] MPI I/O SLOW-
possibleconflictingwithcommunication....code stuck for ever during
IO<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV><FONT size=2 face=新細明體>Sorry, I don't know what do you mean?</FONT></DIV>
<DIV><FONT size=2 face=新細明體></FONT> </DIV>
<DIV><FONT size=2 face=新細明體>Do you have error mail?</FONT></DIV>
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style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt 新細明體">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt 新細明體; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=thakur@mcs.anl.gov href="mailto:thakur@mcs.anl.gov">Rajeev
Thakur</A> </DIV>
<DIV style="FONT: 10pt 新細明體"><B>To:</B> <A title=mpich-discuss@mcs.anl.gov
href="mailto:mpich-discuss@mcs.anl.gov">mpich-discuss@mcs.anl.gov</A> </DIV>
<DIV style="FONT: 10pt 新細明體"><B>Sent:</B> Monday, March 15, 2010 1:30
PM</DIV>
<DIV style="FONT: 10pt 新細明體"><B>Subject:</B> Re: [mpich-discuss] MPI I/O
SLOW- possible conflictingwithcommunication....code stuck for ever during
IO</DIV>
<DIV><BR></DIV>
<DIV dir=ltr align=left><SPAN class=453103005-15032010><FONT color=#0000ff
size=2 face=Arial>Can you send us a small test program that
fails?</FONT></SPAN></DIV><BR>
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style="BORDER-LEFT: #0000ff 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV dir=ltr lang=en-us class=OutlookMessageHeader align=left>
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<FONT size=2 face=Tahoma><B>From:</B> <A
href="mailto:mpich-discuss-bounces@mcs.anl.gov">mpich-discuss-bounces@mcs.anl.gov</A>
[mailto:mpich-discuss-bounces@mcs.anl.gov] <B>On Behalf Of
</B>hossam<BR><B>Sent:</B> Sunday, March 14, 2010 1:57 PM<BR><B>To:</B> <A
href="mailto:mpich-discuss@mcs.anl.gov">mpich-discuss@mcs.anl.gov</A><BR><B>Subject:</B>
[mpich-discuss] MPI I/O SLOW- possible conflicting
withcommunication....code stuck for ever during IO<BR></FONT><BR></DIV>
<DIV></DIV>Hi,<BR><BR>I think i have a well defined problem i wonder if
someone can give an advice.<BR><BR>I am running an MPI code (MPICH2) on a
linux cluster. <BR><BR>When i run the code with no IO inside the main
runtime loop. It works perfectly fine on any number of processors and
nodes. When i start dumping data during the loop<BR>the code get stuck for
ever after the second or third file. <BR><BR>Everything works perfectly
fine on a single processor though.<BR><BR>Now, to make things clearer:
When i use ROMIO (MPI IO) it got stuck during opining the file
(MPI_FILE_OPEN). <BR><BR>However, i tried regular open(....) at the root
processor and then reducing the data to the root processor and write
there. The code got stuck at the MPI_REDUCE call.<BR><BR>If i eliminated
all the processors communication and just do dump IO (both ways), it runs
fine but it slows down significantly when dumping the data.<BR><BR>I tried
on three different clusters(all linux) and i got the same
problem.<BR><BR>I don't want say what i think is the problem, i don't
really know, but if the experts here can help i will
appreciate.<BR><BR> Thanks<BR><BR>
<DIV class=gmail_quote>On Sun, Mar 14, 2010 at 12:50 PM, hossam <SPAN
dir=ltr><<A
href="mailto:hossam.elasrag@gmail.com">hossam.elasrag@gmail.com</A>></SPAN>
wrote:<BR>
<BLOCKQUOTE
style="BORDER-LEFT: rgb(204,204,204) 1px solid; MARGIN: 0pt 0pt 0pt 0.8ex; PADDING-LEFT: 1ex"
class=gmail_quote>Hi,<BR><BR>This is my first post to the mpi-forum. I
have a runtime problem related to MPI using MPICH2. I wonder if this is
the correct forum to post my problem.<BR>Please let me know so i can
proceed forward with my problem details.<BR><BR>Thanks<BR
clear=all><BR><BR><BR></BLOCKQUOTE></DIV><BR><BR
clear=all><BR><BR><BR></BLOCKQUOTE>
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