It seems some thing wrong with the process group id. Can you try the execution again with MPICH debug message ? You can enable debug as below: - configure MPICH again with --enable-g=all, then make && make install - before executing: mkdir -p log/ export MPICHD_DBG_PG=yes export MPICH_DBG_FILENAME="log/dbg-%d.log" export MPICH_DBG_CLASS=ALL export MPICH_DBG_LEVEL=VERBOSE Then can you send me the output and the log files in log/ ? Min On 1/23/17 10:46 AM, Doha Ehab wrote:

Hi Min, I have attached the two Config.log. and here is the code

#include <stdio.h> #include <mpi.h>

int main (argc, argv) int argc; char *argv[]; {

int i=0; MPI_Init (&argc, &argv);/* starts MPI */ // Find out rank, size int world_rank; MPI_Comm_rank(MPI_COMM_WORLD, &world_rank); int world_size; MPI_Comm_size(MPI_COMM_WORLD, &world_size);

int number; if (world_rank == 0) {

number = -1; for( i=1; i < world_size; i++){

MPI_Send(&number, 1, MPI_INT, i, 0, MPI_COMM_WORLD); } } else { MPI_Recv(&number, 1, MPI_INT, 0, 0, MPI_COMM_WORLD, MPI_STATUS_IGNORE); printf("Process %d received number %d from process 0\n",world_rank, number); } MPI_Finalize();

return 0; }

Regards, Doha

On Sun, Jan 22, 2017 at 10:47 PM, Min Si <[email protected] <mailto:[email protected]>> wrote:

Hi Doha,

Can you please send us the config.log file for each MPICH build and your helloworld source doe ? The config.log file should be under your MPICH build directory where you executed ./configure.

Min

On 1/21/17 4:53 AM, Doha Ehab wrote:

...

I have tried what you mentioned in the previous E-mail.

1- I have build MPICH for CPU node and ARM node. 2- Uploaded the binaries on same path on the 2 nodes. 3- Compiled helloWorld (it sends a number from process zero to all other processes ) for both nodes. Then tried mpiexec -np 2 -f <hostfile with mic hostnames>./helloworld

I got this error Fatal error in MPI_Recv: Other MPI error, error stack: MPI_Recv(200)................................: MPI_Recv(buf=0xbe9460d0, count=1, MPI_INT, src=0, tag=0, MPI_COMM_WORLD, status=0x1) failed MPIDI_CH3i_Progress_wait(242)................: an error occurred while handling an event returned by MPIDU_Sock_Wait() MPIDI_CH3I_Progress_handle_sock_event(554)...: MPIDI_CH3_Sockconn_handle_connopen_event(899): unable to find the process group structure with id <>

Regards, Doha

On Wed, Nov 16, 2016 at 6:38 PM, Min Si <[email protected] <mailto:[email protected]>> wrote:

I guess you might need to put all the MPICH binaries (e.g., hydra_pmi_proxy) to the same path on each node. I have executed MPICH on Intel MIC chips from the host CPU node where OS are different. The thing I did was: 1. build MPICH for both CPU node and MIC on the CPU node (you have done this step). 2. upload the MIC binaries to the same path on MIC chip as on the CPU node For example: - on CPU node : /tmp/mpich/install/bin holds the CPU version - on MIC : /tmp/mpich/install/bin holds the MIC version 3. compile helloworld.c with the MIC version mpicc 4. execute on CPU node: mpiexe -np 2 -f <hostfile with mic hostnames>./helloworld

I think you should be able to follow step 2, but since your helloworld binary is also built with different OS, you might want to put it also into the same path on two nodes similar as we do for MPICH binaries.

Min

On 11/16/16 8:29 AM, Kenneth Raffenetti wrote:

Have you disabled any and all firewalls on both nodes? It sounds like they are unable to communicate in initialization.

Ken

On 11/16/2016 07:34 AM, Doha Ehab wrote:

Yes, I built MPICH-3 on both systems and I tried the code on each node separately and it worked, I tried each node with other nodes that has the same operating system and it worked as well. When I try the code on the 2 nodes that have different operating systems no result or error message appear.

Regards Doha

On Mon, Nov 14, 2016 at 6:25 PM, Kenneth Raffenetti <[email protected] <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>>> wrote:

It may be possible to run in such a setup, but it would not be recommended. Did you build MPICH on both systems you are trying to run on? What exactly happened when the code didn't work?

Ken

On 11/13/2016 12:36 AM, Doha Ehab wrote:

Hello, I tried to run a parallel (Hello World) C code on a cluster that has 2 nodes, the nodes have different operating system so the code did not work and no results were printed. How to make such a cluster work? is there is extra steps that should be done?

Regards, Doha

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