Re: [OMPI users] unacceptable latency in gathering process

2012-10-04 Thread Iliev, Hristo
Wednesday, October 03, 2012 6:41 PM To: us...@open-mpi.org Subject: [OMPI users] unacceptable latency in gathering process Hi all, I am running on an IBM BladeCenter, using Open MPI 1.4.1, and opensm subnet manager for Infiniband Our application has real time requirements and it has recently b

Re: [OMPI users] unacceptable latency in gathering process

2012-10-03 Thread Ralph Castain
Out of curiosity, have you logged the time when the SP called "send" and compared it to the time when the message was received, and when that message is picked up in MPI_Test? In other words, have you actually verified that the delay is in the MPI library as opposed to in your application? On

[OMPI users] unacceptable latency in gathering process

2012-10-03 Thread Hodge, Gary C
Hi all, I am running on an IBM BladeCenter, using Open MPI 1.4.1, and opensm subnet manager for Infiniband Our application has real time requirements and it has recently been proven that it does not scale to meet future requirements. Presently, I am re-organizing the application to process work