[OMPI users] thread support in OpenMPI

2011-10-07 Thread Devarshi Ghoshal
Hi, I was just wondering what does "progress: no" signify when I check the level of thread support using ompi_info for the OpenMPI installation I have. Also, I guess "mpi: no" for thread support signify that multiple threads in my MPI program will not work as expected if they have MPI communicati

Re: [OMPI users] Proper way to stop MPI process

2011-10-07 Thread Reuti
Am 28.09.2011 um 22:40 schrieb Xin Tong: I am wondering what the proper way of stop a mpirun process and the child process it created. I tried to send SIGTERM, it does not respond to it ? What kind of signal should I be sending to it ? To whom did you sent the signal? -- Reuti Thanks

Re: [OMPI users] Proper way to stop MPI process

2011-10-07 Thread Reuti
Am 02.10.2011 um 14:35 schrieb Xin Tong: I am using 1.4.3. I send the sigterm from a python script. Then I wait, the processes do not terminate until i keep pressing enter on the keyboard. Is the process really still running or is there just no prompt? Is it just one process, or might it

[OMPI users] MPI_Comm_accept - Busy wait

2011-10-07 Thread Thatyene Louise Alves de Souza Ramos
Hi there! In my code I use MPI_Comm_accept in a server-client communication. I noticed that the server remains on busy wait whereas waiting for clients connections, using 100% of CPU if there are no other processes running. I wonder if there is any way to prevent this from happening. Thanks in a

[OMPI users] Performance slowdown for large cases

2011-10-07 Thread Blosch, Edwin L
All, I'm using OpenMPI 1.4.3 and have been running a particular case on 120, 240, 480 and 960 processes. My time-per-work metric reports 60, 30, 15, 15. If I do the same run with MVAPICH 1.2, I get 60, 30, 15, 8. There is something running very slowly with OpenMPI 1.4.3 as the process count g

Re: [OMPI users] Segfault on any MPI communication on head node

2011-10-07 Thread Phillip Vassenkov
Okay so I finally have a matching set of debug openmpi installs. Here is the output: [phillipv@pastec thomastests]$mpicc testCode2.c -o b.out;mpirun --hostfile hostfile -np 2 ./b.out Enter passphrase for key '/home/phillipv/.ssh/id_rsa':