no only 4<br><br><div class="gmail_quote">2008/11/30 Rajeev Thakur <span dir="ltr"><<a href="mailto:thakur@mcs.anl.gov">thakur@mcs.anl.gov</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>
<div dir="ltr" align="left"><span><font size="2" color="#0000ff" face="Arial">But you don't have 6 cores, do you?</font></span></div><br>
<blockquote style="border-left: 2px solid rgb(0, 0, 255); padding-left: 5px; margin-left: 5px; margin-right: 0px;">
<div dir="ltr" align="left" lang="en-us">
<hr>
<font size="2" face="Tahoma"><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> Saturday, November 29, 2008 11:03 PM<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 runningprocessesonMPICH2<br></div></div></font><br></div><div><div></div><div class="Wj3C7c">
<div></div>Yes, I'm sorry if you were miss led by my wordings.<br>I meant
running two instances.<br><br>
<div class="gmail_quote">2008/11/30 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="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>
<div dir="ltr" align="left"><span><font size="2" color="#0000ff" face="Arial">If you
run two instances of mpiexec -n 3 tst, you are running a total of 6
processes, not 2 or 3. </font></span></div>
<div dir="ltr" align="left"><span><font size="2" color="#0000ff" face="Arial"></font></span> </div>
<div dir="ltr" align="left"><span><font size="2" color="#0000ff" face="Arial">Rajeev</font></span></div><br>
<blockquote style="border-left: 2px solid rgb(0, 0, 255); padding-left: 5px; margin-left: 5px; margin-right: 0px;">
<div dir="ltr" align="left" lang="en-us">
<hr>
<font size="2" face="Tahoma">
<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> Saturday, November 29, 2008
5:38 AM
<div>
<div></div>
<div><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
runningprocessesonMPICH2<br></div></div></font><br></div>
<div>
<div></div>
<div>
<div></div>>What do you mean by "one process" when it is clearly
3<br>>processes are running ? When you say 2 processes of
tst,<br>>do you mean you launched two instances of<br>>"mpiexec -n 3
./tst" simultaneously.<br><br>Yes, I meant of launching two instances of
"mpiexec -n 3 ./tst" simultaneously.<br><br>I could not reach the MPICH
cluster until monday, so that I'll send the modified programme on
Monday.<br><br>Thank You,<br>Waruna<br><br>
<div class="gmail_quote">2008/11/29 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="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">>From
your Readme file:<br><br>> mpiexec -n 3 <path><br>><br>>
output:<br>> when only one process runs<br>><br>> 0:Total:
499999999500000000 : Time: 9.272023<br>> 2:Total: 499999999500000000
: Time: 10.722239<br>> 1:Total: 499999999500000000 : Time:
11.324907<br>><br>> When two processes of 'tst' runs in the same
time<br>><br>> 0:Total: 499999999500000000 : Time:
9.538206<br>> 2:Total: 499999999500000000 : Time: 16.045104<br>>
1:Total: 499999999500000000 : Time: 22.400754<br><br>What do you mean by
"one process" when it is clearly 3<br>processes are running ? When
you say 2 processes of tst,<br>do you mean you launched two instances
of<br>"mpiexec -n 3 ./tst" simultaneously.<br><br>Could you add the
following lines to your tst.cpp<br><br>
char host_name[ MPI_MAX_PROCESSOR_NAME ];<br>
int namelen;<br>
MPI_Get_processor_name( host_name, &namelen );<br>
printf("rank %d running on %s\n", rank,
host_name);<br><br>before first fflush(stdout) to show the location of
each process.<br>Rerun your experiments and let us know the
result.<br><br>Also, you can use MPI_Wtime() instead of Duration.cpp
that may<br>simplify your test program.<br>
<div>
<div></div>
<div><br>A.Chan<br><br>----- "Waruna Ranasinghe" <<a href="mailto:warunapww@gmail.com" target="_blank">warunapww@gmail.com</a>> wrote:<br><br>> Hi
Rajeev,<br>> Here's test programme. It's just for testing. The
results I got, are<br>> in the<br>> read me file in the
attachment<br>><br>> Thank You<br>> Waruna<br>><br>>
2008/11/27 Rajeev Thakur <<a href="mailto:thakur@mcs.anl.gov" target="_blank">thakur@mcs.anl.gov</a>><br>><br>> > In
that case, what kind of program are you running? Can you send us<br>>
a<br>> > small test program.<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:* Wednesday, November 26, 2008
9:05 PM<br>> ><br>> > *To:* <a href="mailto:mpich-discuss@mcs.anl.gov" target="_blank">mpich-discuss@mcs.anl.gov</a><br>> > *Subject:* Re:
[mpich-discuss] Clarification needed on<br>> >
runningprocessesonMPICH2<br>> ><br>> > 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>> > 2008/11/26 Rajeev Thakur
<<a href="mailto:thakur@mcs.anl.gov" target="_blank">thakur@mcs.anl.gov</a>><br>> ><br>> >>
Make sure the processes are actually running on the 3
machines.<br>> Try the<br>> >> cpi example in the examples
directory. It prints out the hostname.<br>> How are<br>> >>
you running the job?<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<br>> Ranasinghe<br>> >> *Sent:* Wednesday, November
26, 2008 11:07 AM<br>> >><br>> >> *To:* <a href="mailto:mpich-discuss@mcs.anl.gov" target="_blank">mpich-discuss@mcs.anl.gov</a><br>> >> *Subject:*
Re: [mpich-discuss] Clarification needed on running<br>> >>
processesonMPICH2<br>> >><br>> >> Fedora 8 -
MPICH2 one machine with core-2-duo - master<br>> >> two
machines with one core<br>> >> all together 3 nodes<br>>
>><br>> >> 2008/11/26 Rajeev Thakur <<a href="mailto:thakur@mcs.anl.gov" target="_blank">thakur@mcs.anl.gov</a>><br>> >><br>>
>>> What kind of environment are you running on (how many
machines,<br>> how<br>> >>> many cores each)?<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<br>> Ranasinghe<br>> >>> *Sent:* Wednesday,
November 26, 2008 2:15 AM<br>> >>> *To:* <a href="mailto:mpich-discuss@mcs.anl.gov" target="_blank">mpich-discuss@mcs.anl.gov</a><br>> >>>
*Subject:* Re: [mpich-discuss] Clarification needed on running<br>>
processes<br>> >>> onMPICH2<br>> >>><br>>
>>> 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<br>> 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<br>> for<br>> >>> sometime and
so on.<br>> >>> Therefore, ultimately both the processes
will run for t1+t2<br>> >>><br>> >>> Cluster:
MPICH2<br>> >>> Fedora 8<br>> >>><br>>
>>> 2008/11/26 Anthony Chan <<a href="mailto:chan@mcs.anl.gov" target="_blank">chan@mcs.anl.gov</a>><br>> >>><br>>
>>>><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>> >>>> ----- "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<br>> will<br>> >>>> > appear
in<br>> >>>> > t1 seconds<br>> >>>>
> Process B also utilize 100% of the cpu while it runs. The<br>>
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<br>> answers<br>> >>>> >
will<br>> >>>> > appear in t1 + t2 seconds. where as I
want to get the Process<br>> 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<br>> adding<br>> >>>>
> an<br>> >>>> > > fflush(stdout) after the
printf. You don't have much control<br>> 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<br>> 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<br>> processes<br>> >>>> > on<br>>
>>>> > > MPICH2<br>> >>>> >
><br>> >>>> > > Hi all,<br>> >>>>
> > I submitted 3 processes at the same time using mpiexec.
the<br>> results<br>> >>>> > of each<br>>
>>>> > > process appears only after all the processes
have finished.<br>> (I guess<br>> >>>> >
that<br>> >>>> > > the way mpich schedule
it).<br>> >>>> > > What if I want to get the result
of the process, which was<br>> 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>> >>>> > ><br>>
>>>><br>> >>><br>> >>><br>>
>><br>>
><br></div></div></blockquote></div><br></div></div></blockquote></div></blockquote></div><br></div></div></blockquote></div>
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