Re: [OMPI devel] some questions regarding the portals modules

2010-07-09 Thread Ralph Castain
On Jul 9, 2010, at 3:23 PM, Jerome Soumagne wrote: > Hi Ken, > > I thank you a lot for your reply, I will think about it and do some more > tests. I was only thinking about using MPI threads, but yes as you say if two > threads are scheduled on the same core, that wouldn't be pretty at all. I

Re: [OMPI devel] some questions regarding the portals modules

2010-07-09 Thread Jerome Soumagne
Hi Ken, I thank you a lot for your reply, I will think about it and do some more tests. I was only thinking about using MPI threads, but yes as you say if two threads are scheduled on the same core, that wouldn't be pretty at all. I can probably do some more tests of that functionality, but I

Re: [OMPI devel] some questions regarding the portals modules

2010-07-09 Thread Matney Sr, Kenneth D.
Hello Jerome, The first one is simple. portals is not thead-safe on the Cray XT. As, I recall, only the master thread can post an event. although any thread can receive the event. Although, i might have it backwards. It has been a couple of years since I played with this. The second one depe

[OMPI devel] some questions regarding the portals modules

2010-07-09 Thread Jerome Soumagne
Hi, As I said in the previous e-mail, we've recently installed OpenMPI on a Cray XT5 machine, and we therefore use the portals and the alps libraries. Thanks for providing the configuration script from Jaguar, this was very helpful, it had just to be slightly adapted in order to use the lates