Re: [OMPI users] 100% CPU load without sm-btl

2007-10-23 Thread Murat Knecht
Good to know that I'm not just not finding the solution, there simply is none. The system is actually dedicated to the job. But the process may, while working, receive a signal that alters the ongoing job. Like for example a terminate signal or more data to be taken into consideration. That's why I

Re: [OMPI users] 100% CPU load without sm-btl

2007-10-23 Thread George Bosilca
Currently there is no work around this issue. We consider(ed) that when you run an MPI job the cluster is in dedicated mode, so a 100% CPU consumption is acceptable. However, as we discussed at our last meeting, there are others reasons to be able to yield the CPU until a message arrives. T

Re: [OMPI users] 100% CPU load without sm-btl

2007-10-23 Thread Murat Knecht
Hi, thanks for answering. Unfortunately, I did try that, too. The point is that i don't understand the ressource consumption. Even if the processor is yielded, it still is busy waiting, wasting system resources which could otherwise be used for actual work. Isn't there some way to activate an inter

Re: [OMPI users] 100% CPU load without sm-btl

2007-10-23 Thread Tim Mattox
You should look at these two FAQ entries: http://www.open-mpi.org/faq/?category=running#oversubscribing http://www.open-mpi.org/faq/?category=running#force-aggressive-degraded To get what you want, you need to force Open MPI to yield the processor rather than be aggressively waiting for a message