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On 19/12/2016 07:58, Marco Atzeri wrote:
On 18/12/2016 15:55, Bahadır Öncel wrote:Hello all! I've installed cygwin and openmpi successfully. I can compile and run mpi programs. Twist is, even the openmpi test program hello_c.c approx takes a minute to run. When I try in my virtual machine (linux) the same program takes less than a second to run. I've found that other users asked the same question but did not find any solution. Thanks in advance. --the most likely issue is a network interface timeout. Try disabling WIFI network or VPN interface as test. Regards Marco
Hi Bahadır, this is the normal behaviour of the hello_c run on my machine. $ time mpirun -n 2 ./hello_c.exeHello, world, I am 0 of 2, (Open MPI v1.10.4, package: Open MPI , ident: 1.10.4, repo rev: v1.10.3-45-gaafbd34, Sep 01, 2016, 129) Hello, world, I am 1 of 2, (Open MPI v1.10.4, package: Open MPI , ident: 1.10.4, repo rev: v1.10.3-45-gaafbd34, Sep 01, 2016, 129)
real 0m3.428s user 0m1.293s sys 0m2.930s The timing should be in the second range. Attached a program that will allow you to identify all the network interfaces as seen by Cygwin with their Windows name. $ gcc -o get-interface get-interface.c $ ./get-interface internal_name: {EC2ABB5C-42A8-431D-A133-8F4BE0F309AF} flags: AF_INET6 up multicast address: fe80::a479:1393:b7d0:fb25%18 friendly_name: Local Area Connection 2 internal_name: {EC2ABB5C-42A8-431D-A133-8F4BE0F309AF} flags: AF_INET up broadcast multicast address: 169.254.251.37 friendly_name: Local Area Connection 2 ...and so on.
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get-interface.c
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