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Re: [ptp-user] parallel application run failure 

On Aug 11, 2009, at 5:52 PM, Dave Wootton wrote:



Brett
I have a small MPI program, two tasks, I ran that outputs a single line of text, about 100 bytes long to stdout. If the program runs for a few seconds, then I see the output appear in the console view, assuming I have checked the 'Display combined output in a console view'. 

A few questions for you
Is your program writing to stdout using stdio functions (printf, etc) or writing to file descriptor 1 using write() system calls, assuming C/C++ code. If it's Fortran code are you using write/print statements? 
I wrote a simple test case this morning that exhibits the same issue:

#include <stdio.h>

int main(void) {
printf("Simple IO test to see if this appears on the Eclipse console \n"); 
	sleep(10);
	printf("Bye bye!\n");
}
With the PTP runtime jobs view open, normal behavior should be seeing is that a blue job icon briefly appears in the left hand pane of teh jobs view. After a couple seconds, it should turn into a green triangle and green diamond icons appear in the right hand pane of the jobs view, 1 per task. When the job completes, the job icon and the diamond icons should turn red. Are you seeing this sequence or something else?
I see the blue icon change to a green triangle, but there are no diamonds (green or otherwise) in the jobs view.
Once the job completes, if you double click on the leftmost red diamond icon, which represents task 0, a 'Process details' window should appear in the editor pane of the perspective, with the job output appearing there. You should also be able to do this when the icon is green and watch stdout in real time. Do you see anything there? 
Still no diamonds??
If you open the error log view, do you see any errors (red icons) logged related to the run?
I am seeing some rather non-descript errors. They seem to appear one per process when the run starts and again when it ends. The errors simply say "ProcessChange: unknown process 8" and an exception trace is not available.
Does it appear that the program is otherwise running to completion (other data files it writes other than stdout/stderr get created correctly)?
My previous test appeared to, but I don't think this one is staying running 10 seconds so I would say no. The infinite loop test stayed running until I told it to stop.
I'm seeing the output almost immediately after I start the program. If you change your test program so that it runs for something like 10 seconds instead of running quickly, or an infinite loop, does that affect the output? 
Dave



Re: [ptp-user] parallel application run failure

Brett Bode
to:
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08/11/2009 03:09 PM

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It can be a short running job, but I have modified it to go into an
infinite loop as well. When it's setup as a short running task the
second console window does not open at all. The traceback shows up for
both cases. In any event I would hope that I would be able to see the
output of even something as trivial as hostname.

Brett
On Aug 11, 2009, at 2:05 PM, Greg Watson wrote:

> Brett,
>
> Is this a short running job (e.g. hello world)? If so, it's possible
> the program is exiting before any output can be displayed. You could
> test this by adding a sleep(1) at the end of the program.
>
> Greg
>
> On Aug 11, 2009, at 2:32 PM, Brett Bode wrote:
>
>> Hello all,
>>  I am having a problem where I am attempting to run a simple MPI
>> application remotely on an AIX 6.1 system utilizing the PE RM proxy
>> (this is with the 8/5 PTP 3.0 build and corresponding RDT server,
>> etc). It appears that the application launches and runs
>> successfully, but I do not receive any output back to the console
>> in eclipse. I have tried several things including specifying a file
>> for the output and error (that does appear to work), but have had
>> no luck getting output back to the eclipse console.
>>
>> If I set the app up to go into a loop I see a console list the
>> build results (that works fine) and then a new console opens up but
>> remains empty. If I set the app up to run (quickly) to termination
>> the 2nd console doesn't open at all. The only clue I see is a
>> traceback on the server side in the window running the RDT server
>> process:
>>
>>                   java.io.IOException: Pipe closed
>>      at java.io.PipedInputStream.read(PipedInputStream.java:263)
>>      at
>> com.ibm.jvm.io.ProcessInputStream.read(ProcessInputStream.java:92)
>>      at java.io.FilterInputStream.read(FilterInputStream.java:89)
>>      at
>> org
>> .eclipse
>> .rse
>> .internal
>> .dstore
>> .universal
>> .miners.command.OutputHandler.readLines(OutputHandler.java:168)
>>      at
>> org
>> .eclipse
>> .rse
>> .internal
>> .dstore
>> .universal.miners.command.OutputHandler.handle(OutputHandler.java: 91) 
>>      at org.eclipse.dstore.core.model.Handler.finish(Handler.java:
>> 102)
>>      at
>> org
>> .eclipse
>> .rse
>> .internal
>> .dstore
>> .universal.miners.command.OutputHandler.handle(OutputHandler.java:
>> 110)
>>      at org.eclipse.dstore.core.model.Handler.run(Handler.java:135)
>>
>> I do have the "Display combined output in console view" box
>> checked, though I have also tried it without it checked.
>>
>> Brett
>>
>>
>> _______________________________________________
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>> ptp-user@xxxxxxxxxxx
>> https://dev.eclipse.org/mailman/listinfo/ptp-user
>
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