This is just a test example. The real project behind it needs to configure like that.
> From: te...@chem.gu.se > To: us...@open-mpi.org > Date: Wed, 23 Sep 2009 09:39:22 +1000 > Subject: Re: [OMPI users] How to create multi-thread parallel program using > thread-safe send and recv? > > If you want all threads to communicate via MPI, and your initially > launching multiple parents, I don't really see the advantage of using > threads at all. Why not launch 12 MPI processes? > > On Tue, 2009-09-22 at 10:32 -0700, Eugene Loh wrote: > > guosong wrote: > > > Thanks for responding. I used a linux cluster. I think I would like > > > to create a model that is multithreaded and each thread can make MPI > > > calls. I attached test code as follow. It has two pthreads and there > > > are MPI calls in both of those two threads. In the main function, > > > there are also MPI calls. Should I use a full multithreading? > > I guess so. It seems like the created threads are expected to make > > independent/concurrent message-passing calls. Do read the link I > > sent. You need to convert from MPI_Init to MPI_Init_thread(), asking > > for a full-multithreaded model and checking that you got it. Also > > note in main() that the MPI_Isend() calls should be matched with > > MPI_Wait() or similar calls. I guess the parent thread will sit in > > such calls while the child threads do their own message passing. Good > > luck. > > _______________________________________________ > > users mailing list > > us...@open-mpi.org > > http://www.open-mpi.org/mailman/listinfo.cgi/users > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users _________________________________________________________________ Messenger10年嘉年华，礼品大奖等你拿！ http://10.msn.com.cn
