[mpich-discuss] I wonder if my mpdboot is the cause of problem...help me!

[Gra zeus]

FYI, I use C++ and mpicxx to complie files. I also tried write my code in C and used mpicc to complie - got the same result.

--- On Sat, 7/18/09, Gra zeus <gra_zeus at yahoo.com> wrote:

From: Gra zeus <gra_zeus at yahoo.com>
Subject: Re: [mpich-discuss] I wonder if my mpdboot is the cause of problem...help me!
To: mpich-discuss at mcs.anl.gov
Date: Saturday, July 18, 2009, 3:31 AM

yes, mpdtrace show both node. I use version mpich2-1.1 from download page. My OS is REHL 5. when I run my program, if MPI_Send and MPI_Recv are not used, it worked. printf or cout from both machines appear in my console normally. 

--- On Fri, 7/17/09, Pavan Balaji <balaji at mcs.anl.gov> wrote:

From: Pavan Balaji <balaji at mcs.anl.gov>
Subject: Re: [mpich-discuss] I wonder if my mpdboot is the cause of problem...help me!
To: mpich-discuss at mcs.anl.gov
Date: Friday, July 17, 2009, 10:12 PM


Does mpdtrace show both nodes? Which version of MPICH2 are you using?

 -- Pavan

On 07/18/2009 12:05 AM, Gra zeus wrote:
> hello,
> 
> thx for answer yesterday.
>
 I tested my code in one machine (with"mpiexec -n 2 ./myprog"),everything work fine - my program can use MPI_Send,MPI_Recv without any problems.
> 
> today, I setup mpich2 on two machines. Both machines can communicate with others, ssh are tested on both machines, mpd work, mpdringtest work.
> 
> however,when i run my program that use MPI_Send and MPI_Recv,  MPI_Recv is blocked forever.
> so i write new simple code to test MPI_Send,MPI_Recv like this
> 
>         int myrank;
>         MPI_Status status;
> MPI_Init( &argc, &argv );
> MPI_Comm_rank( MPI_COMM_WORLD, &myrank );
> if (myrank == 0) {
> int senddata = 1;
> MPI_Send(&senddata, 1, MPI_INT, 1, 0, MPI_COMM_WORLD);
> }
> else if (myrank == 1) {
> int recvdata = 0;
> MPI_Recv(&recvdata, 1, MPI_INT, 0, 0,
 MPI_COMM_WORLD, &status);
> printf("received :%d:\n", recvdata);
> }
> MPI_Finalize();
> 
> 
> i got this error
> 
> 
> Assertion failed in file ch3_progress.c at line 489: pkt->type >= 0 && pkt->type < MPIDI_NEM_PKT_END
> internal ABORT - process 1
> Fatal error in MPI_Finalize: Other MPI error, error stack:
> MPI_Finalize(315)..................: MPI_Finalize failed
> MPI_Finalize(207)..................: MPID_Finalize(92)..................: PMPI_Barrier(476)..................: MPI_Barrier(comm=0x44000002) failed
> MPIR_Barrier(82)...................: MPIC_Sendrecv(164).................: MPIC_Wait(405).....................: MPIDI_CH3I_Progress(150)...........: MPID_nem_mpich2_blocking_recv(1074): MPID_nem_tcp_connpoll(1667)........: state_commrdy_handler(1517)........: MPID_nem_tcp_recv_handler(1413)....: socket closed
> 
>
 ////////////////////////////////////////////////////////////////
> 
> I also tried example/cpi that come with install package -> result is the example program freezed, without any errors.(I assume it stopped at MPI_Bcast())
> 
> Can anyone help me with this?
> This code and my program can run smoothly when I use 1 machine (with option ,  -n 2, -n 4 .... etc) but whenever I start mpdboot with 2 machines, mpi processes can't communicate with other mpi processes via MPI_Send,MPI_Recv.
> 
> thx,
> gra
> 
> 
> 

-- Pavan Balaji
http://www.mcs.anl.gov/~balaji





      


      
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