Re: [OMPI users] Re : Yet another stdin problem

[Ralph Castain]

FWIW: an upcoming version will have the ability for you to specify all  
ranks to receive stdin...but that's a little ways off.


For now, only rank=0 does.

On Oct 7, 2009, at 9:42 AM, Roman Cheplyaka wrote:


As a slight modification, you can write a wrapper script

#!/bin/sh
my_exe < inputs.txt

and pass it to mpirun.

2009/10/7 Kilou Zelabia :

Ok thanks!
That's a solution but i was wondering if there could exist a more  
elegant

one ? means without any modification at the source level


De : Roman Cheplyaka 
À : Open MPI Users 
Envoyé le : Mer 7 Octobre 2009, 17 h 06 min 55 s
Objet : Re: [OMPI users] Yet another stdin problem

Why not modify your program to read inputs.txt instead of stdin?

2009/10/7 Kilou Zelabia :

Dear all,

I'm trying to lunch an MPI program using the command

mpirun -np 64 my_exe < inputs.txt

inputs.txt actually contains the entries that  are read by all  
processes
however it seems that openmpi redirect the stdin only to the  
processes

with
rank 0. with leads to a segmentation fault on the other processes.
The option "-stdin rank" doesn't help since i need all processes  
read the

inputs.txt file.

I'v tested with openmpi 1.3 and 1.2 whitout success.

Thanks in advance for you help.

Zellabia. S




___
users mailing list
us...@open-mpi.org
http://www.open-mpi.org/mailman/listinfo.cgi/users





--
Roman I. Cheplyaka

___
users mailing list
us...@open-mpi.org
http://www.open-mpi.org/mailman/listinfo.cgi/users

___
users mailing list
us...@open-mpi.org
http://www.open-mpi.org/mailman/listinfo.cgi/users





--
Roman I. Cheplyaka

___
users mailing list
us...@open-mpi.org
http://www.open-mpi.org/mailman/listinfo.cgi/users

Re: [OMPI users] Re : Yet another stdin problem

[Ashley Pittman]

Or better still if you want to be able to pass the filename and args on
the mpirun command line use the following and then run it as 

mpirun -np 64 ./input_wrapper inputs.txt my_exe

#!/bin/bash

FILE=$1
shift

"$@" < $FILE

In general though using stdin on parallel applications is rarely a good
solution.

Ashley.

On Wed, 2009-10-07 at 18:42 +0300, Roman Cheplyaka wrote:
> As a slight modification, you can write a wrapper script
> 
> #!/bin/sh
> my_exe < inputs.txt
> 
> and pass it to mpirun.

-- 
Ashley Pittman, Bath, UK.

Padb - A parallel job inspection tool for cluster computing
http://padb.pittman.org.uk

Re: [OMPI users] Re : Yet another stdin problem

[Roman Cheplyaka]

As a slight modification, you can write a wrapper script

#!/bin/sh
my_exe < inputs.txt

and pass it to mpirun.

2009/10/7 Kilou Zelabia :
> Ok thanks!
> That's a solution but i was wondering if there could exist a more elegant
> one ? means without any modification at the source level
>
> 
> De : Roman Cheplyaka 
> À : Open MPI Users 
> Envoyé le : Mer 7 Octobre 2009, 17 h 06 min 55 s
> Objet : Re: [OMPI users] Yet another stdin problem
>
> Why not modify your program to read inputs.txt instead of stdin?
>
> 2009/10/7 Kilou Zelabia :
>> Dear all,
>>
>> I'm trying to lunch an MPI program using the command
>>
>> mpirun -np 64 my_exe < inputs.txt
>>
>> inputs.txt actually contains the entries that  are read by all processes
>> however it seems that openmpi redirect the stdin only to the processes
>> with
>> rank 0. with leads to a segmentation fault on the other processes.
>> The option "-stdin rank" doesn't help since i need all processes read the
>> inputs.txt file.
>>
>> I'v tested with openmpi 1.3 and 1.2 whitout success.
>>
>> Thanks in advance for you help.
>>
>> Zellabia. S
>>
>>
>>
>>
>> ___
>> users mailing list
>> us...@open-mpi.org
>> http://www.open-mpi.org/mailman/listinfo.cgi/users
>>
>
>
>
> --
> Roman I. Cheplyaka
>
> ___
> users mailing list
> us...@open-mpi.org
> http://www.open-mpi.org/mailman/listinfo.cgi/users
>
> ___
> users mailing list
> us...@open-mpi.org
> http://www.open-mpi.org/mailman/listinfo.cgi/users
>



-- 
Roman I. Cheplyaka

[OMPI users] Re : Yet another stdin problem

[Kilou Zelabia]

Ok thanks!
That's a solution but i was wondering if there could exist a more elegant one ? 
means without any modification at the source level





De : Roman Cheplyaka 
À : Open MPI Users 
Envoyé le : Mer 7 Octobre 2009, 17 h 06 min 55 s
Objet : Re: [OMPI users] Yet another stdin problem

Why not modify your program to read inputs.txt instead of stdin?

2009/10/7 Kilou Zelabia :
> Dear all,
>
> I'm trying to lunch an MPI program using the command
>
> mpirun -np 64 my_exe < inputs.txt
>
> inputs.txt actually contains the entries that  are read by all processes
> however it seems that openmpi redirect the stdin only to the processes with
> rank 0. with leads to a segmentation fault on the other processes.
> The option "-stdin rank" doesn't help since i need all processes read the
> inputs.txt file.
>
> I'v tested with openmpi 1.3 and 1.2 whitout success.
>
> Thanks in advance for you help.
>
> Zellabia. S
>
>
>
>
> ___
> users mailing list
> us...@open-mpi.org
> http://www.open-mpi.org/mailman/listinfo.cgi/users
>



-- 
Roman I. Cheplyaka

___
users mailing list
us...@open-mpi.org
http://www.open-mpi.org/mailman/listinfo.cgi/users