>> Just to check what is going on, why don't you remove that message passing
>> code and just
>>
>> printf("Hello MPI World from process %d!", my_rank
>>
>> in each process? Much more direct - avoids any ambiguity.
>>
>> Also, be certain that you compile this program for the specific OMPI
>> version you are running it under. OMPI is NOT binary compatible across
>> releases - you have to recompile the program for the specific release you
>> are going to use.
>>
>>
>> On Apr 17, 2010, at 4:52 PM, Mario Ogrizek wrote:
>>
>> Ofcourse, its the same program, wasnt recompiled for a week.
>>
>>
>> #include <stdio.h>
>> #include <string.h>
>> #include "mpi.h"
>>
>> int main(int argc, char* argv[]){
>> int my_rank; /* rank of process */
>> int p; /* number of processes */
>> int source; /* rank of sender */
>> int dest; /* rank of receiver */
>> int tag=0; /* tag for messages */
>> char message[100]; /* storage for message */
>> MPI_Status status ; /* return status for receive */
>>
>> /* start up MPI */
>>
>> MPI_Init(&argc, &argv);
>>
>> /* find out process rank */
>> MPI_Comm_rank(MPI_COMM_WORLD, &my_rank);
>>
>>
>> /* find out number of processes */
>> MPI_Comm_size(MPI_COMM_WORLD, &p);
>>
>>
>> if (my_rank !=0){
>> /* create message */
>> sprintf(message, "Hello MPI World from process %d!", my_rank);
>> dest = 0;
>> /* use strlen+1 so that '\0' get transmitted */
>> MPI_Send(message, strlen(message)+1, MPI_CHAR,
>> dest, tag, MPI_COMM_WORLD);
>> }
>> else{
>> printf("Hello MPI World From process 0: Num processes: %d\n",p);
>> for (source = 1; source < p; source++) {
>> MPI_Recv(message, 100, MPI_CHAR, source, tag,
>> MPI_COMM_WORLD, &status);
>> printf("%s\n",message);
>> }
>> }
>> /* shut down MPI */
>> MPI_Finalize();
>>
>>
>> return 0;
>> }
>>
>> I triplechecked:
>> v1.2 output
>> Hello MPI World From process 0: Num processes: 4
>> Hello MPI World from process 1!
>> Hello MPI World from process 2!
>> Hello MPI World from process 3!
>>
>> v1.4 output:
>>
>> Hello MPI World From process 0: Num processes: 1
>>
>> Hello MPI World From process 0: Num processes: 1
>>
>> Hello MPI World From process 0: Num processes: 1
>>
>> Hello MPI World From process 0: Num processes: 1
>>
>>
>>
>>
>>
>>
>>
>> On Sat, Apr 17, 2010 at 9:13 PM, Ralph Castain <r...@open-mpi.org> wrote:
>>
>>>
>>> On Apr 17, 2010, at 11:17 AM, Mario Ogrizek wrote:
>>>
>>> Hahaha, ok then that WAS silly! :D
>>> So there is no way to utilize both cores with mpi?
>>>
>>>
>>> We are using both cores - it is just that they are on the same node.
>>> Unless told otherwise, the processes will use shared memory for
>>> communication.
>>>
>>>
>>> Ah well, I'll correct that.
>>>
>>> From console, im starting a job like this: mpirun -np 4 Program, where i
>>> want to run a Program on 4 processors.
>>> I was just stumbled when i got same output 4 times, like there are 4
>>> processes ranked 0.
>>> While with the old version of mpi (1.2) same execution would give 4
>>> processes ranked 0..3.
>>>
>>>
>>> And so you should - if not, then there is something wrong. No way mpirun
>>> would start 4 processes ranked 0. How are you printing the rank? Are you
>>> sure you are getting it correctly?
>>>
>>>
>>>
>>> Hope you see my question.
>>>
>>> On Sat, Apr 17, 2010 at 6:29 PM, Ralph Castain <r...@open-mpi.org> wrote:
>>>
>>>>
>>>> On Apr 17, 2010, at 1:16 AM, Mario Ogrizek wrote:
>>>>
>>>> I am new to mpi, so I'm sorry for any silly questions.
>>>>
>>>> My idea was to try to use dual core machine as two nodes. I have a
>>>> limited access to a cluster, so this was just for "testing" purposes.
>>>> My default hostfile contains usual comments and this two nodes:
>>>>
>>>> node0
>>>> node1
>>>>
>>>> I thought that each processor is a node for MPI purpose.
>>>>
>>>>
>>>> I'm afraid not - it is just another processor on that node. So you only
>>>> have one node as far as OMPI is concerned.
>>>>
>>>> Im not sure what do you mean with "mpirun cmd line"?
>>>>
>>>>
>>>> How are you starting your job? The usual way is with "mpirun -n N ...".
>>>> That is what we mean by the "mpirun cmd line" - i.e., what command are you
>>>> using to start your job?
>>>>
>>>> It sounds like things are actually working correctly. You might look at
>>>> "mpirun -h" for possible options of interest.
>>>>
>>>>
>>>>
>>>> Regards,
>>>>
>>>> Mario
>>>>
>>>> On Sat, Apr 17, 2010 at 1:54 AM, Ralph Castain <r...@open-mpi.org>wrote:
>>>>
>>>>>
>>>>> On Apr 16, 2010, at 5:08 PM, Mario Ogrizek wrote:
>>>>>
>>>>> I checked the default MCA param file, and found it was there that was
>>>>> (automatically) specified as a relative path, so i changed it.
>>>>> So now, it works, altho, still something is not right.
>>>>> Seems like its creating 4 times only 1 process.
>>>>> Not sure if it has to do something with my hostfile, it contains:
>>>>>
>>>>> node0
>>>>> node1
>>>>>
>>>>> I am running this on a simple dualcore machine, so i specified it as a
>>>>> localhost with two nodes.
>>>>>
>>>>>
>>>>> I don't understand this comment - a dual core machine would still be a
>>>>> single node. Just happens to have two processors in it.
>>>>>
>>>>> Could you send the contents of your hostfile and your mpirun cmd line?
>>>>>
>>>>>
>>>>> Regards,
>>>>>
>>>>> Mario
>>>>>
>>>>> On Sat, Apr 17, 2010 at 12:52 AM, Mario Ogrizek <
>>>>> mario.guard...@gmail.com> wrote:
>>>>>
>>>>>> I understand, so, its looking for a
>>>>>> working_dir/usr/local/etc/openmpi-default-hostfile
>>>>>> I managed to run a hello world program from the console, while my wd
>>>>>> was just "/" and it worked, altho strangely...
>>>>>> example for 4 procs:
>>>>>>
>>>>>> Hello MPI World From process 0: Num processes: 1
>>>>>> Hello MPI World From process 0: Num processes: 1
>>>>>> Hello MPI World From process 0: Num processes: 1
>>>>>> Hello MPI World From process 0: Num processes: 1
>>>>>>
>>>>>> So, you are saying i allways have to be in "/" to run mpi programs, or
>>>>>> there is a way for mpi to search absolute path?
>>>>>> It seems pretty inconvinient this way.
>>>>>> I think v 1.2 didnt have this limitation.
>>>>>>
>>>>>> Does this have to do anything with LD_LIBRARY_PATH?
>>>>>>
>>>>>> Regards,
>>>>>>
>>>>>> Mario
>>>>>>
>>>>>> On Fri, Apr 16, 2010 at 7:46 PM, Ralph Castain <r...@open-mpi.org>wrote:
>>>>>>
>>>>>>> How did you specify it? Command line? Default MCA param file?
>>>>>>>
>>>>>>> On Apr 16, 2010, at 11:44 AM, Mario Ogrizek wrote:
>>>>>>>
>>>>>>> Any idea how to solve this?
>>>>>>>
>>>>>>> On Fri, Apr 16, 2010 at 7:40 PM, Timur Magomedov <
>>>>>>> timur.magome...@developonbox.ru> wrote:
>>>>>>>
>>>>>>>> Hello.
>>>>>>>> It looks that you hostfile path should
>>>>>>>> be /usr/local/etc/openmpi-default-hostfile not
>>>>>>>> usr/local/etc/openmpi-default-hostfile but somehow Open MPI gets the
>>>>>>>> second path.
>>>>>>>>
>>>>>>>> ? ???, 16/04/2010 ? 19:10 +0200, Mario Ogrizek ?????:
>>>>>>>> > Well, im not sure why should i name it /openmpi-default-hostfile
>>>>>>>> > Especially, because mpirun v1.2 executes without any errors.
>>>>>>>> > But, i made a copy named /openmpi-default-hostfile, and still, the
>>>>>>>> > same result.
>>>>>>>> >
>>>>>>>> > This is the whole error message for a simple hello world program:
>>>>>>>> >
>>>>>>>> >
>>>>>>>> > Open RTE was unable to open the hostfile:
>>>>>>>> > usr/local/etc/openmpi-default-hostfile
>>>>>>>> > Check to make sure the path and filename are correct.
>>>>>>>> >
>>>>>>>>
--------------------------------------------------------------------------
>>>>>>>> > [Mario.local:04300] [[114,0],0] ORTE_ERROR_LOG: Not found in file
>>>>>>>> > base/ras_base_allocate.c at line 186
>>>>>>>> > [Mario.local:04300] [[114,0],0] ORTE_ERROR_LOG: Not found in file
>>>>>>>> > base/plm_base_launch_support.c at line 72
>>>>>>>> > [Mario.local:04300] [[114,0],0] ORTE_ERROR_LOG: Not found in file
>>>>>>>> > plm_rsh_module.c at line 990
>>>>>>>> >
>>>>>>>>
--------------------------------------------------------------------------
>>>>>>>> > A daemon (pid unknown) died unexpectedly on signal 1 while
>>>>>>>> attempting
>>>>>>>> > to
>>>>>>>> > launch so we are aborting.
>>>>>>>> >
>>>>>>>> >
>>>>>>>> > There may be more information reported by the environment (see
>>>>>>>> above).
>>>>>>>> >
>>>>>>>> >
>>>>>>>> > This may be because the daemon was unable to find all the needed
>>>>>>>> > shared
>>>>>>>> > libraries on the remote node. You may set your LD_LIBRARY_PATH to
>>>>>>>> have
>>>>>>>> > the
>>>>>>>> > location of the shared libraries on the remote nodes and this will
>>>>>>>> > automatically be forwarded to the remote nodes.
>>>>>>>> >
>>>>>>>>
--------------------------------------------------------------------------
>>>>>>>> >
>>>>>>>>
--------------------------------------------------------------------------
>>>>>>>> > mpirun noticed that the job aborted, but has no info as to the
>>>>>>>> process
>>>>>>>> > that caused that situation.
>>>>>>>> >
>>>>>>>>
--------------------------------------------------------------------------
>>>>>>>> > mpirun: clean termination accomplished
>>>>>>>> >
>>>>>>>> >
>>>>>>>> >
>>>>>>>> >
>>>>>>>> > ps. PTP is a parallel tools platform plugin for eclipse
>>>>>>>> >
>>>>>>>> >
>>>>>>>> > Regards,
>>>>>>>> >
>>>>>>>> >
>>>>>>>> > Mario
>>>>>>>> >
>>>>>>>> > _______________________________________________
>>>>>>>> > users mailing list
>>>>>>>> > us...@open-mpi.org
>>>>>>>> > http://www.open-mpi.org/mailman/listinfo.cgi/users
>>>>>>>>
>>>>>>>>
>>>>>>>> --
>>>>>>>> Kind regards,
>>>>>>>> Timur Magomedov
>>>>>>>> Senior C++ Developer
>>>>>>>> DevelopOnBox LLC / Zodiac Interactive
>>>>>>>> http://www.zodiac.tv/
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> 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
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> users mailing list
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>>>>>>> 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
>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> users mailing list
>>>>> us...@open-mpi.org
>>>>> http://www.open-mpi.org/mailman/listinfo.cgi/users
>>>>>
>>>>
>>>> _______________________________________________
>>>> users mailing list
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>>>>
>>>>
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>>>>
>>>
>>> _______________________________________________
>>> users mailing list
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>>>
>>>
>>>
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>>
>> _______________________________________________
>> users mailing list
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>>
>>
>>
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