Re: [OMPI users] Program abortion at a simple MPI_Get Programm

[Siegmar Gross]

Hi,

> I wrote a litte MPI program to demonstrate the mpi_get() function
> (see attachment).
> 
> The idea behind the program is that a master process with rank 0
> fills an integer array with the size of MPI_Comm_size with values.
> The other processes should MPI_GET the value from this shared int
> array at the index of their rank.
> 
> We could compile the code, but execution will raise an error.

You use the following statements:

int rank, size, *a, *b, namelen, i, sizereal, flag;
...
MPI_Win_get_attr(win, MPI_WIN_SIZE, , );

The MPI 3.0 standard requires on page 416 that MPI_WIN_SIZE should
have type "MPI_Aint *".

tyr test_onesided 138 diff beispiel2_flo.c*
18c18
<   int rank, size, *a, *b, namelen, i,  flag;
---
>   int rank, size, *a, *b, namelen, i, sizereal, flag;
21d20
<   MPI_Aint *sizereal;
44c43
<   {
---
>   {+
54c53
<   printf("Real Size %d\n", *sizereal); 
---
>   printf("Real Size %d\n", sizereal); 
59c58
< printf ("Process %d after MPI_Win_create()\n", rank);
---
> printf ("Process %d after MPI_Win_create()\n");
77c76
< printf("Prozess %d# hat Wert %d von Prozess 0 geholt\n", rank, *b);
---
> printf("Prozess %d# hat Wert %d von Prozess 0 geholt\n", rank, b);
[2]  - Done  xemacs beispiel2_flo.c
tyr test_onesided 139 


If you change the type of "sizereal" and fix some more bugs, you
get what you want.

tyr test_onesided 139 mpiexec -np 2 a.out
Guten Tag. Ich bin Prozess 1 von 2. Ich werde auf Host 
tyr.informatik.hs-fulda.de ausgefuehrt
Guten Tag. Ich bin Prozess 0 von 2. Ich werde auf Host 
tyr.informatik.hs-fulda.de ausgefuehrt
a[0]=0
a[1]=100
ok1
ok1
Process 1 after MPI_Win_create()
ok3
ok2
Real Size 8
ok3
Prozess 1# hat Wert 100 von Prozess 0 geholt
tyr test_onesided 140 


Kind regards

Siegmar

Re: [OMPI users] Program abortion at a simple MPI_Get Programm

[Florian Hahner]

Thanks for your reply.

I think its the best to give you the versions of the implementations I use

OpenMPI 1.8.2 
MPICH 3.0.2
LAM MPI 7.1.5

As you see in my program code, I use MPI_Win_get_attr to show the size of the 
window. Program crashes here. So I presume something went wrong at the 
WIN_Create call.

I can comment out the MPI_Win_get_attr call, but then MPI_Get reads wrong data. 
I presume It reads somewhere outside the window because printf will show 
something like 2478000

Mit freundlichen Grüßen

Florian Hahner

-Ursprüngliche Nachricht-
Von: users [mailto:users-boun...@open-mpi.org] Im Auftrag von Jeff Squyres 
(jsquyres)
Gesendet: Dienstag, 17. Juni 2014 22:10
An: Open MPI User's List
Betreff: Re: [OMPI users] Program abortion at a simple MPI_Get Programm

I'll let Nathan/others comment on the correctness of your program.

What version of Open MPI are you using?  Be sure to use the latest to get the 
most correct one-sided implementation.

Also, as one of the prior LAM/MPI developers, I must plead with you to stop 
using LAM/MPI.  We abandoned it many years ago in favor of Open MPI.  :-)


On Jun 17, 2014, at 3:59 PM, Florian Hahner <h...@florian-hahner.de> wrote:

> Hello MPI users,
>  
> first of all i want to introduce myself.  My name is Florian Hahner and I'm 
> studying applied computer science in Fulda, Germany. In our class 'parallel 
> computing' I'm working at a MPI-2 Project to show the benefits and the 
> working method of one-sided communications.
>  
> I wrote a litte MPI program to demonstrate the mpi_get() function (see 
> attachment).
>  
> The idea behind the program is that a master process with rank 0 fills an 
> integer array with the size of MPI_Comm_size with values. The other processes 
> should MPI_GET the value from this shared int array at the index of their 
> rank.
>  
> We could compile the code, but execution will raise an error.
>  
> We compile and run it with several MPI implementations (LAMMPI, MPICH ) and 
> get every time errors. Host system is:  5.10 Generic_150400-10 sun4u sparc 
> SUNW,SPARC-Enterprise Solaris
>  
> PS: I've some information are missing, please fill free to ask!
>  
> Best Regards
>  
> Florian Hahner
> ___
> users mailing list
> us...@open-mpi.org
> Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users
> Link to this post: 
> http://www.open-mpi.org/community/lists/users/2014/06/24668.php


-- 
Jeff Squyres
jsquy...@cisco.com
For corporate legal information go to: 
http://www.cisco.com/web/about/doing_business/legal/cri/

___
users mailing list
us...@open-mpi.org
Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users
Link to this post: 
http://www.open-mpi.org/community/lists/users/2014/06/24669.php

Re: [OMPI users] Program abortion at a simple MPI_Get Programm

[Jeff Squyres (jsquyres)]

I'll let Nathan/others comment on the correctness of your program.

What version of Open MPI are you using?  Be sure to use the latest to get the 
most correct one-sided implementation.

Also, as one of the prior LAM/MPI developers, I must plead with you to stop 
using LAM/MPI.  We abandoned it many years ago in favor of Open MPI.  :-)


On Jun 17, 2014, at 3:59 PM, Florian Hahner  wrote:

> Hello MPI users,
>  
> first of all i want to introduce myself.  My name is Florian Hahner and I’m 
> studying applied computer science in Fulda, Germany. In our class ‘parallel 
> computing’ I’m working at a MPI-2 Project to show the benefits and the 
> working method of one-sided communications.
>  
> I wrote a litte MPI program to demonstrate the mpi_get() function (see 
> attachment).
>  
> The idea behind the program is that a master process with rank 0 fills an 
> integer array with the size of MPI_Comm_size with values. The other processes 
> should MPI_GET the value from this shared int array at the index of their 
> rank.
>  
> We could compile the code, but execution will raise an error.
>  
> We compile and run it with several MPI implementations (LAMMPI, MPICH ) and 
> get every time errors. Host system is:  5.10 Generic_150400-10 sun4u sparc 
> SUNW,SPARC-Enterprise Solaris
>  
> PS: I’ve some information are missing, please fill free to ask!
>  
> Best Regards
>  
> Florian Hahner
> ___
> users mailing list
> us...@open-mpi.org
> Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users
> Link to this post: 
> http://www.open-mpi.org/community/lists/users/2014/06/24668.php


-- 
Jeff Squyres
jsquy...@cisco.com
For corporate legal information go to: 
http://www.cisco.com/web/about/doing_business/legal/cri/