Try limiting the interfaces we use to see if that's really the problem. I forget if cygwin has "ifconfig" or not, but use a tool to report the networks, and then start excluding them by adding
-mca oob_tcp_if_exclude foo,bar to your cmd line until you find the one that is causing the hang. That will (a) confirm that it is a network timeout issue, and (b) which network is causing the problem. On Nov 24, 2012, at 1:00 AM, marco atzeri <marco.atz...@gmail.com> wrote: > on cygwin running on localhost on standalone computer I noticed > a large time discrepancy when the computer is connected or not to > the network. > > Physical Connected: > > marco@MARCOATZERI /pub/devel/openmpi/examples > $ time mpirun -n 4 ./hello_c.exe > Hello, world, I am 0 of 4 > Hello, world, I am 1 of 4 > Hello, world, I am 2 of 4 > Hello, world, I am 3 of 4 > > real 1m14.568s > user 0m1.496s > sys 0m2.602s > > NOT connected (all interface down) > > $ time mpirun -n 4 ./hello_c.exe > Hello, world, I am 0 of 4 > Hello, world, I am 2 of 4 > Hello, world, I am 1 of 4 > Hello, world, I am 3 of 4 > > real 0m3.323s > user 0m1.480s > sys 0m2.118s > > > I guess the 1 minute is due to some time of timeout. > Is such delay present on any other platform ? > Any workaround to remove it ? > > Regards > Marco > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
