Re: [OMPI users] MPI_Init seems to hang, but works after a minute or two
On 10/27/2014 8:32 AM, maxinator333 wrote: Hello, After compiling and running a MPI program, it seems to hang at MPI_Init(), but it eventually will work after a minute or two. While the problem occured on my Notebook it did not on my desktop PC. It can be a timeout on a network interface. I see a similar issue with wireless ON but not with wireless OFF on my notebook. In the past I saw with some virtual driver of Telecom company for the 3G driver. Both run on Win 7, cygwin 64 Bit, OpenMPI version 1.8.3 r32794 (ompi_info), g++ v 4.8.3. I actually synced the cygwin installations later on, and it still didn't work, but it did for a short time after a restart... Regards Marco
Re: [OMPI users] MPI_Init seems to hang, but works after a, minute or two
Hello, After compiling and running a MPI program, it seems to hang at MPI_Init(), but it eventually will work after a minute or two. While the problem occured on my Notebook it did not on my desktop PC. It can be a timeout on a network interface. I see a similar issue with wireless ON but not with wireless OFF on my notebook. In the past I saw with some virtual driver of Telecom company for the 3G driver. Both run on Win 7, cygwin 64 Bit, OpenMPI version 1.8.3 r32794 (ompi_info), g++ v 4.8.3. I actually synced the cygwin installations later on, and it still didn't work, but it did for a short time after a restart... Regards Marco Thank you :) Deactivating my WLAN did indeed the trick! It also seems to not work, if a LAN-cable is plugged in. No difference if I am correctly connected (to the internet/gateway) or not (wrong IP, e.g. static given IP instead of mandatory DHCP) Again: deactivating the relevant LAN helps It seems, that in contrast to LAN, for WLAN it makes a difference, if I'm connected to some network or not. If not connected, it seems to work, without deactivating the whole hardware.
Re: [OMPI users] MPI_Init seems to hang, but works after a, minute or two
On Oct 27, 2014, at 1:25 PM, maxinator333 wrote: > Deactivating my WLAN did indeed the trick! > It also seems to not work, if a LAN-cable is plugged in. No difference if I > am correctly connected (to the internet/gateway) or not (wrong IP, e.g. > static given IP instead of mandatory DHCP) > Again: deactivating the relevant LAN helps > It seems, that in contrast to LAN, for WLAN it makes a difference, if I'm > connected to some network or not. If not connected, it seems to work, without > deactivating the whole hardware. If you're only running on a single machine, you can deactivate the network transports in Open MPI and only used the shared memory transport. That should allow you to run without deactivating any hardware. E.g. mpirun --mca btl sm,self ... -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
Re: [OMPI users] MPI_Init seems to hang, but works after a, minute or two
It doesn't seem to work. (switching off wlan still works) mpicc mpiinit.c -o mpiinit.exe; time mpirun --mca btl sm,self -n 2 ./mpiinit.exe real0m43.733s user0m0.888s sys 0m0.824s Am 28.10.2014 13:40, schrieb Jeff Squyres (jsquyres): On Oct 27, 2014, at 1:25 PM, maxinator333 wrote: Deactivating my WLAN did indeed the trick! It also seems to not work, if a LAN-cable is plugged in. No difference if I am correctly connected (to the internet/gateway) or not (wrong IP, e.g. static given IP instead of mandatory DHCP) Again: deactivating the relevant LAN helps It seems, that in contrast to LAN, for WLAN it makes a difference, if I'm connected to some network or not. If not connected, it seems to work, without deactivating the whole hardware. If you're only running on a single machine, you can deactivate the network transports in Open MPI and only used the shared memory transport. That should allow you to run without deactivating any hardware. E.g. mpirun --mca btl sm,self ...
Re: [OMPI users] MPI_Init seems to hang, but works after a, minute or two
On Oct 28, 2014, at 9:02 AM, maxinator333 wrote: > It doesn't seem to work. (switching off wlan still works) > mpicc mpiinit.c -o mpiinit.exe; time mpirun --mca btl sm,self -n 2 > ./mpiinit.exe > > real0m43.733s > user0m0.888s > sys 0m0.824s Ah, this must be an ORTE issue, then (i.e., the run-time system beneath the MPI layer). Try specifying that ORTE should use the loopback interface: mpirun --mca btl sm,self --mca oob_tcp_if_include lo ... (actually, I don't know what the loopback interface is called on Windows; it's typically "lo" in Linux 2.6 kernels...) -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
