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">thakur@mcs.anl.gov</a>></span><br>
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<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>
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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 2:15 AM<div class="Ih2E3d"><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 class="Wj3C7c">
<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>
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<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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