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<DIV dir=ltr align=left><SPAN class=171275604-27112008><FONT face=Arial
color=#0000ff size=2>In that case, what kind of program are you running? Can you
send us a small test program.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=171275604-27112008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=171275604-27112008><FONT face=Arial
color=#0000ff size=2>Rajeev</FONT></SPAN></DIV><BR>
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style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
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<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>Waruna
Ranasinghe<BR><B>Sent:</B> Wednesday, November 26, 2008 9:05 PM<BR><B>To:</B>
mpich-discuss@mcs.anl.gov<BR><B>Subject:</B> Re: [mpich-discuss] Clarification
needed on runningprocessesonMPICH2<BR></FONT><BR></DIV>
<DIV></DIV>Hi Rajeev,<BR>There's no doubt that process runs on all 3
machines.<BR>I have tried cpi example and it prints the hostnames of 3
machines<BR><BR>mpiexec -l -n 3 <path to process><BR>(the same path is
available in all 3 machines)<BR><BR>Thank you<BR>Waruna<BR><BR><BR>
<DIV class=gmail_quote>2008/11/26 Rajeev Thakur <SPAN dir=ltr><<A
href="mailto:thakur@mcs.anl.gov">thakur@mcs.anl.gov</A>></SPAN><BR>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">
<DIV>
<DIV dir=ltr align=left><SPAN><FONT face=Arial color=#0000ff size=2>Make
sure the processes are actually running on the 3 machines. Try the cpi
example in the examples directory. It prints out the hostname. How are you
running the job?</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN><FONT face=Arial color=#0000ff
size=2>Rajeev</FONT> </SPAN></DIV><BR>
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style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: rgb(0,0,255) 2px solid; MARGIN-RIGHT: 0px">
<DIV lang=en-us dir=ltr align=left>
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<FONT face=Tahoma size=2>
<DIV class=Ih2E3d><B>From:</B> <A
href="mailto:mpich-discuss-bounces@mcs.anl.gov"
target=_blank>mpich-discuss-bounces@mcs.anl.gov</A> [mailto:<A
href="mailto:mpich-discuss-bounces@mcs.anl.gov"
target=_blank>mpich-discuss-bounces@mcs.anl.gov</A>] <B>On Behalf Of
</B>Waruna Ranasinghe<BR></DIV><B>Sent:</B> Wednesday, November 26, 2008
11:07 AM
<DIV>
<DIV></DIV>
<DIV class=Wj3C7c><BR><B>To:</B> <A
href="mailto:mpich-discuss@mcs.anl.gov"
target=_blank>mpich-discuss@mcs.anl.gov</A><BR><B>Subject:</B> Re:
[mpich-discuss] Clarification needed on running
processesonMPICH2<BR></DIV></DIV></FONT><BR></DIV>
<DIV>
<DIV></DIV>
<DIV class=Wj3C7c>
<DIV></DIV>Fedora 8 - MPICH2
<DIV>one machine with core-2-duo - master</DIV>
<DIV>two machines with one core</DIV>
<DIV>all together 3 nodes<BR>
<DIV><BR>
<DIV class=gmail_quote>2008/11/26 Rajeev Thakur <SPAN dir=ltr><<A
href="mailto:thakur@mcs.anl.gov"
target=_blank>thakur@mcs.anl.gov</A>></SPAN><BR>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">
<DIV>
<DIV dir=ltr align=left><SPAN><FONT face=Arial color=#0000ff size=2>What
kind of environment are you running on (how many machines, how many
cores each)? </FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN><FONT face=Arial color=#0000ff
size=2>Rajeev</FONT></SPAN></DIV><BR>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: rgb(0,0,255) 2px solid; MARGIN-RIGHT: 0px">
<DIV lang=en-us dir=ltr align=left>
<HR>
<FONT face=Tahoma size=2>
<DIV><B>From:</B> <A href="mailto:mpich-discuss-bounces@mcs.anl.gov"
target=_blank>mpich-discuss-bounces@mcs.anl.gov</A> [mailto:<A
href="mailto:mpich-discuss-bounces@mcs.anl.gov"
target=_blank>mpich-discuss-bounces@mcs.anl.gov</A>] <B>On Behalf Of
</B>Waruna Ranasinghe<BR></DIV><B>Sent:</B> Wednesday, November 26,
2008 2:15 AM
<DIV><BR><B>To:</B> <A href="mailto:mpich-discuss@mcs.anl.gov"
target=_blank>mpich-discuss@mcs.anl.gov</A><BR></DIV><B>Subject:</B>
Re: [mpich-discuss] Clarification needed on running processes
onMPICH2<BR></FONT><BR></DIV>
<DIV>
<DIV></DIV>
<DIV>
<DIV></DIV>Hi Anthony,<BR>I'm sorry, in this case I have to disagree
with you.<BR>Because it is not max(t1,t2) but t1+t2 (this is the real
result I got)<BR>I use fflush(stdout) also<BR><BR>What I think is
that, Cluster runs two programmes alternatively.<BR>i.e. Process A
runs for a while (say t3 seconds) then process B for sometime and so
on.<BR>Therefore, ultimately both the processes will run for
t1+t2<BR><BR>Cluster: MPICH2<BR>Fedora 8<BR><BR>
<DIV class=gmail_quote>2008/11/26 Anthony Chan <SPAN dir=ltr><<A
href="mailto:chan@mcs.anl.gov"
target=_blank>chan@mcs.anl.gov</A>></SPAN><BR>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid"><BR>If
process A and B are launched by mpiexec, the time taken<BR>by
mpiexec should be max(t1,t2) not t1 + t2. As Rajeev said,<BR>calling
fflush(stdout) after each printf() is the fastest way<BR>to get each
process's stdout printed to your console.<BR><BR>A.Chan<BR>
<DIV>
<DIV></DIV>
<DIV>----- "Waruna Ranasinghe" <<A
href="mailto:warunapww@gmail.com"
target=_blank>warunapww@gmail.com</A>> wrote:<BR><BR>> Hi
Rajeev,<BR>> Actually this is not what I'm talking about.<BR>>
Say there are processes A and B<BR>> Process A utilize 100% of
the cpu while it runs. The answer will<BR>> appear in<BR>> t1
seconds<BR>> Process B also utilize 100% of the cpu while it
runs. The answer will<BR>> appear<BR>> in t2
seconds<BR>><BR>> When I run both the process A and B at the
same time, The both answers<BR>> will<BR>> appear in t1 + t2
seconds. where as I want to get the Process A's<BR>>
answer<BR>> first. (Here Process A is submitted before Process
B)<BR>><BR>> Is there anything that I can do to make this
happen.<BR>><BR>> Thank You,<BR>> Waruna<BR>><BR>>
2008/11/26 Rajeev Thakur <<A href="mailto:thakur@mcs.anl.gov"
target=_blank>thakur@mcs.anl.gov</A>><BR>><BR>> >
If you are refering to the output of "printf", you can try
adding<BR>> an<BR>> > fflush(stdout) after the printf. You
don't have much control over<BR>> the order<BR>> > in which
it is printed from different processes.<BR>> ><BR>> >
Rajeev<BR>> ><BR>> >
------------------------------<BR>> > *From:* <A
href="mailto:mpich-discuss-bounces@mcs.anl.gov"
target=_blank>mpich-discuss-bounces@mcs.anl.gov</A> [mailto:<BR>>
> <A href="mailto:mpich-discuss-bounces@mcs.anl.gov"
target=_blank>mpich-discuss-bounces@mcs.anl.gov</A>] *On Behalf Of
*Waruna Ranasinghe<BR>> > *Sent:* Tuesday, November 25, 2008
1:35 AM<BR>> > *To:* <A
href="mailto:mpich-discuss@mcs.anl.gov"
target=_blank>mpich-discuss@mcs.anl.gov</A><BR>> > *Subject:*
[mpich-discuss] Clarification needed on running processes<BR>>
on<BR>> > MPICH2<BR>> ><BR>> > Hi all,<BR>>
> I submitted 3 processes at the same time using mpiexec. the
results<BR>> of each<BR>> > process appears only after all
the processes have finished. (I guess<BR>> that<BR>> > the
way mpich schedule it).<BR>> > What if I want to get the
result of the process, which was submitted<BR>> first,<BR>>
> first. (like first in first out).<BR>> ><BR>> > I
use MPICH2 cluster in Fedora 8 (with mpd)<BR>> ><BR>> >
Thank you.<BR>> > Waruna Ranasinghe<BR>> ><BR>>
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