One thing to be careful of is that you are not mixing an mpiexec from openmpi with an application linked with mpich. This can cause issues with processes being able to connect to each other, which is likely what is happening in your runs. Please double check that you are using the mpiexec from mpich. Ken On 01/28/2017 04:37 AM, [email protected] wrote:

Dear all,

I want to use MPICH instead of OpenMPI and have some difficulties. Using OpenMPI worked fine.

I run my program on two different machines and set the MPICH_PORT_RANGE to that of OpenMPI, but it seems like my program is running into a deadlock. Sometimes I do not get any error message and sometimes I get the following:

Assertion failed in file src/mpid/ch3/src/ch3u_handle_connection.c at line 325: vc->state == MPIDI_VC_STATE_ACTIVE internal ABORT - process 0

Do I need to change the port range of MPICH? Is there a function like ompi_info to figure out the port range for MPICH as well? Or do you think there is another problem? Do I need to set other environment variables as well?

The ssh connection on both machines works. I also used a test program using only send and receive calls which led to the same problem.

I would be very happy for any hints.

Thank you and have a good weekend! Lisa

_______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss

_______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss