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

[Jayesh Krishna]

Hi,
 With MPICH2 1.2.1p1 you should be able to use the Nemesis channel using the "-channel" option of mpiexec (mpiexec -n 2 -channel nemesis mympipgm.exe). 

Regards,
Jayesh

----- Original Message -----
From: "Koh Voon Li" <kohvoonli at gmail.com>
To: "Jayesh Krishna" <jayesh at mcs.anl.gov>
Cc: mpich-discuss at mcs.anl.gov
Sent: Tuesday, March 1, 2011 6:39:25 AM
Subject: Re: [mpich-discuss] mpich2-1.2.1p1 runs for a while and failed

Hi, 


Thanks for the reply. Are there any old version which use Nemesis channel? 
Thanks. 


Regards, 
Koh 


On Mon, Feb 28, 2011 at 9:34 PM, Jayesh Krishna < jayesh at mcs.anl.gov > wrote: 


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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