[mpich-discuss] mpich2-1.2.1p1 runs for a while and failed

[Jayesh Krishna]

Hi,
 Try the latest stable release of MPICH2 (http://www.mcs.anl.gov/research/projects/mpich2/downloads/index.php?s=downloads).
 It looks like you are explicitly using the sock channel (with "-channel sock" option of mpiexec) for running your MPI job. Is there any reason why you want to use the sock channel instead of the default nemesis channel (If you don't use the "-channel" option mpiexec should pick the nemesis channel) ? Sock channel is old and we recommend all users to use the Nemesis channel instead.

Regards,
Jayesh
----- Original Message -----
From: "Koh Voon Li" <kohvoonli at gmail.com>
To: mpich-discuss at mcs.anl.gov
Sent: Sunday, February 27, 2011 8:47:39 PM
Subject: [mpich-discuss] mpich2-1.2.1p1 runs for a while and failed



Hi, I am running 2 PC both with Window 7 home premium edition for parallel calculation by using MPICH2 version mpich2-1.2.1p1, it run for 3D FDS calculation which runs for a while and then fails with a number of MPI error messages as below. 



Fatal error in MPI_Allreduce: Other MPI error, error stack: 
MPI_Allreduce(773)........................: MPI_Allreduce(sbuf=000000003FC70738, 
rbuf=000000003FC706F8, count=10, MPI_LOGICAL, MPI_LXOR, MPI_COMM_WORLD) failed 
MPIR_Bcast(1031)..........................: 
MPIR_Bcast_binomial(157)..................: 
MPIC_Recv(83).............................: 
MPIC_Wait(513)............................: 
MPIDI_CH3i_Progress_wait(215).............: an error occurred while handling an 
event returned by MPIDU_Sock_Wait() 
MPIDI_CH3I_Progress_handle_sock_event(420): 
MPIDU_Sock_wait(2606).....................: The semaphore timeout period has exp 
ired. (errno 121) 
Fatal error in MPI_Allreduce: Other MPI error, error stack: 
MPI_Allreduce(773)........................: MPI_Allreduce(sbuf=000000003FC707B8, 
rbuf=000000003FC70778, count=10, MPI_LOGICAL, MPI_LXOR, MPI_COMM_WORLD) failed 
MPIR_Allreduce(289).......................: 
MPIC_Sendrecv(164)........................: 
MPIC_Wait(513)............................: 
MPIDI_CH3i_Progress_wait(215).............: an error occurred while handling an 
event returned by MPIDU_Sock_Wait() 
MPIDI_CH3I_Progress_handle_sock_event(420): 
MPIDU_Sock_wait(2606).....................: The semaphore timeout period has exp 
ired. (errno 121) 


I tried to ping test on each PC and its failed. It seem like I got no response from the network adapter. 
I disabled the network adapter and enabled it then everything seem to be normal again. 
Both PC are connected by using a crossover cable. 
Thanks. 
Regards, 
Koh 



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