Thank you, Gilles! It's amazing to get such help. It seems to work when I unplugged the ethernet and have the wireless on, but I will check it out further (including the firewall situation) to pin it down.
time mpirun -np 4 ./a Hello from 1 out of 4 images. Hello from 2 out of 4 images. Hello from 3 out of 4 images. Hello from 4 out of 4 images. real 0m0.774s <<<<----------------------------------------------- user 0m0.341s sys 0m0.933s On Tue, Feb 23, 2016 at 4:26 PM, Gilles Gouaillardet <gil...@rist.or.jp> wrote: > Walt, > > generally speaking, that kind of things happen when you are using a > wireless network and/or a firewall. > > so i recommend you first try to disconnect all your networks and see how > things get improved > > Cheers, > > Gilles > > > On 2/24/2016 5:08 AM, Walt Brainerd wrote: > > I am running up-to-date cygwin on W10 on a 4x i5 processor, > including gcc 5.3. > > I built libcaf_mpi.a provided by OpenCoarrays. > > $ cat hello.f90 > program hello > > implicit none > > print *, "Hello from", this_image(), & > "out of", num_images(), "images." > > end program hello > > I compiled the hello.f90 with > > $ mpifort -fcoarray=lib hello.f90 libcaf_mpi.a > > and ran it with > > $ time mpirun -np 4 ./a > Hello from 1 out of 4 images. > Hello from 2 out of 4 images. > Hello from 3 out of 4 images. > Hello from 4 out of 4 images. > > real 0m42.733s !!!!!!!!!!!!!!!!!!!!! <-------------------- > user 0m0.201s > sys 0m0.934s > > So I am getting this long startup delay. The same thing > happens with other coarray programs. > > Any ideas? BTW, I know almost nothing about MPI :-(. > > Thanks. > > -- > Walt Brainerd > > > _______________________________________________ > users mailing listus...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2016/02/28569.php > > > > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2016/02/28570.php > -- Walt Brainerd
