Open MPI logo

Open MPI User's Mailing List Archives

  |   Home   |   Support   |   FAQ   |   all Open MPI User's mailing list

Subject: Re: [OMPI users] running as rank 0 of 1 for 2 processor
From: Ramya Narasimhan (varsharamya_at_[hidden])
Date: 2009-02-13 04:09:42


Hi Raymond,
                   Thanks for your reply. Actually I have installed lam
previously. When I completely removed the mpirun from the /usr/bin and set
mpirun to this openmpi path its working correctly.
Ramya

On Fri, Feb 13, 2009 at 1:47 PM, Raymond Wan <rwan_at_[hidden]>wrote:

>
> Hi Ramya,
>
>
> Ramya Narasimhan wrote:
>
>> Hi,
>> I have installed openmpi-1.3. When I checked for the example programs,
>> the output shows only rank 0 of size 1 for 2 processors. When I gave the
>> command: *mpirun -hostfile node -np 2 hello_c*
>> the output is
>> Hello, world, I am 0 of 1
>> Hello, world, I am 0 of 1
>>
>> In my node file, I have
>> *IP address* slots=2 max_slots=2
>> I don't know why it is not giving as 0 of 2 and 1 of 2.
>>
>
>
> Other than the text output, can you confirm that this is happening? I'm no
> expert, but as a sanity check, I would put an infinite loop after printing
> "hello, world". Then opening another terminal and run "top". I'm not sure
> if all top's are the same, but I would hit "f" to include more fields and
> then "J" to include the "Last used cpu". Check the help manual for your top
> if its different for you. On my top, this information is not included by
> default. Then return to the previous screen.
>
> Ideally, you should see two processes running on your computer. One on
> processor "0" and the other on "1". Can you confirm this is not the case
> and both are set to "0"?
>
> Ray
>
> _______________________________________________
> users mailing list
> users_at_[hidden]
> http://www.open-mpi.org/mailman/listinfo.cgi/users
>