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Subject: [OMPI users] network timeout
From: marco atzeri (marco.atzeri_at_[hidden])
Date: 2012-11-24 04:00:09


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_at_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