[OMPI users] open mpi on smp
hi, am beginner in openmpi could anyone tell me how do i run programs in open mpi on smp.. as in do I have to do any changes in hostfile ... like in mpich -- I write server:2 how do I do it openmpi
Re: [OMPI users] open mpi on smp
hi thanks..everyone, it was very helpful.. I have another question too, but I will post it as a different topic On 4/17/08, Mark Kosmowski wrote: > > Cally: > > In the hostfile you add a "slots" line. For example on my dual > opteron (single core) system, I have slots=2. This can be read about > in more detail in the FAQ - I provide a link for this section below - > you may need to scroll down to see the example hostfile at the end of > the section. > > http://www.open-mpi.org/faq/?category=running#mpirun-scheduling > > Happy computing, > > Mark Kosmowski > > > Message: 1 > > Date: Wed, 16 Apr 2008 14:32:58 +0200 > > From: " Jozef K??er " > > Subject: Re: [OMPI users] open mpi on smp > > To: "Open MPI Users" > > Message-ID: > ><8803b3d0804160532t60d9e82embeb01b8389416...@mail.gmail.com> > > Content-Type: text/plain; charset="iso-8859-1" > > > > I think that in pure OpenMPI environment (without any resorce manager) > you > > should be able to run applications like this: > > > > mpirun -np 2 mpi_executable > > or > > mpirun -np 4 -machinefile machines.list mpi_executable > > > > where machines.list contains a list of your computers identified by > their > > host names. > > The former command should run the program locally on 2 processors/cores, > the > > latter > > one on those specified in the list. > > > > Regards, > > Jozef > > > > On Tue, Apr 15, 2008 at 6:38 PM, Cally K wrote: > > > > > hi, am beginner in openmpi > > > > > > > > > could anyone tell me how do i run programs in open mpi on smp.. as in > do I > > > have to do any changes in hostfile ... like in mpich -- I write > > > > > > server:2 > > > > > > how do I do it openmpi > > > > > > > > > ___ > > > users mailing list > > > us...@open-mpi.org > > > http://www.open-mpi.org/mailman/listinfo.cgi/users > > > > ___ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users >
[OMPI users] Allocating some amount of memory for a process
Hi everyone Hi, am a beginner in openmpi, does openmpi provide a function for allocating memory to a process. For example, I have a rendering process from paraview named pvserver and I would like to allocate a certain amount of memory for that process across a few nodes specified in the hostfile..Any idea...
[OMPI users] --bynode vs --byslot
Hi, I have a question about --bynode and --byslot that i would like to clarify Say, for example, I have a hostfile #Hostfile __ node0 node1 slots=2 max_slots=2 node2 slots=2 max_slots=2 node3 slots=4 max_slots=4 ___ There are 4 nodes and 9 slots, how do I run my mpirun, for now I use a) mpirun -np --bynode 4 ./abcd I know that the slot thingy is for SMPs, and I have tried running mpirun -np --byslot 9 ./abcd and I noticed that its longer when I do --byslot when compared to --bynode and I just read the faq that said, by defauly the byslot option is used, so I dun have to use it rite,,, I am testing my application's performance, need to do some benchmarking...amd I doing it right by using the bynode option Or I dun mind benchmarking the byslot option, but only if I am doing it rite Could someone tell me
[OMPI users] include port 80 in the hostfile
Hi, Is there a way to include an IP address with a different port in the openmpi hostfile, I keep getting error.. the pc sits on a different port, port 80 whereas the others sit in port 22, how do I do that.
Re: [OMPI users] include port 80 in the hostfile
Thank Adrian, solved it.. On 5/25/08, Adrian Knoth wrote: > > On Sun, May 25, 2008 at 11:59:04AM +0800, Cally K wrote: > > > Is there a way to include an IP address with a different port in the > openmpi > > hostfile, I keep getting error.. the pc sits on a different port, port 80 > > whereas the others sit in port 22, how do I do that. > > No host sits on a special port. Hosts have IP addresses, whereas ports > address a program (service) on a host (ports are the address information > for the application layer). > > What you probably mean is: On one of your hosts, sshd is running on > port 80 instead of 22. > > You can simply solve this problem by placing the appropriate port > configuration in your .ssh/config file on the connecting host: > > Host = some.host.name > Port = 80 > > This allows you to say "ssh some.host.name" instead of "ssh -p 80 > some.host.name" > > So there's no need to specify the remote ssh port in the hostfile. > > > > -- > Cluster and Metacomputing Working Group > Friedrich-Schiller-Universität Jena, Germany > > private: http://adi.thur.de > ___ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users >
[OMPI users] Problem with X forwarding
hi, I have some problem running DistributedData.cxx ( it is a VTK file ) , I need to be able to see the rendering from my computer I, however have problem running the executable, I loaded both the executabe into 2 machines and I am accesing it from my computer( DHCP enabled ) after running the following command - I use OpenMPI mpirun -hostfile myhostfile -np 2 -bynode ./DistributedData and I keep getting these errors ERROR: In /home/kalpanak/Installation_Files/VTKProject/VTK/Rendering/vtkXOpenGLRenderWindow.cxx, line 326 vtkXOpenGLRenderWindow (0x8664438): bad X server connection. ERROR: In /home/kalpanak/Installation_Files/VTKProject/VTK/Rendering/vtkXOpenGLRenderWindow.cxx, line 169 vtkXOpenGLRenderWindow (0x8664438): bad X server connection. [vrc1:27394] *** Process received signal *** [vrc1:27394] Signal: Segmentation fault (11) [vrc1:27394] Signal code: Address not mapped (1) [vrc1:27394] Failing at address: 0x84 [vrc1:27394] [ 0] [0xe440] [vrc1:27394] [ 1] ./DistributedData(_ZN22vtkXOpenGLRenderWindow20GetDesiredVisualInfoEv+0x229) [0x8227e7d] [vrc1:27394] [ 2] ./DistributedData(_ZN22vtkXOpenGLRenderWindow16WindowInitializeEv+0x340) [0x8226812] [vrc1:27394] [ 3] ./DistributedData(_ZN22vtkXOpenGLRenderWindow10InitializeEv+0x29) [0x82234f9] [vrc1:27394] [ 4] ./DistributedData(_ZN22vtkXOpenGLRenderWindow5StartEv+0x29) [0x82235eb] [vrc1:27394] [ 5] ./DistributedData(_ZN15vtkRenderWindow14DoStereoRenderEv+0x1a) [0x82342ac] [vrc1:27394] [ 6] ./DistributedData(_ZN15vtkRenderWindow10DoFDRenderEv+0x427) [0x8234757] [vrc1:27394] [ 7] ./DistributedData(_ZN15vtkRenderWindow10DoAARenderEv+0x5b7) [0x8234d19] [vrc1:27394] [ 8] ./DistributedData(_ZN15vtkRenderWindow6RenderEv+0x690) [0x82353b4] [vrc1:27394] [ 9] ./DistributedData(_ZN22vtkXOpenGLRenderWindow6RenderEv+0x52) [0x82245e2] [vrc1:27394] [10] ./DistributedData [0x819e355] [vrc1:27394] [11] ./DistributedData(_ZN16vtkMPIController19SingleMethodExecuteEv+0x1ab) [0x837a447] [vrc1:27394] [12] ./DistributedData(main+0x180) [0x819de78] [vrc1:27394] [13] /lib/libc.so.6(__libc_start_main+0xe0) [0xb79c0fe0] [vrc1:27394] [14] ./DistributedData [0x819dc21] [vrc1:27394] *** End of error message *** mpirun noticed that job rank 0 with PID 27394 on node exited on signal 11 (Segmentation fault). Maybe I am not doing the xforwading properly, but has anyone ever encountered the same problem, it works fine on one pc, and I read the mailing list but I just don't know if my prob is similiar to their, I even tried changing the DISPLAY env This is what I want to do my mpirun should run on 2 machines ( A and B ) and I should be able to view the output ( on my PC ), are there any specfic commands to use.
Re: [OMPI users] --bynode vs --byslot
Thanks, that was actually a lot of help, I had very little understanding of the bynode and byslot thingy, thanks On 6/5/08, Jeff Squyres wrote: > > On May 23, 2008, at 9:07 PM, Cally K wrote: > > > Hi, I have a question about --bynode and --byslot that i would like > > to clarify > > > > Say, for example, I have a hostfile > > > > #Hostfile > > > > __ > > node0 > > node1 slots=2 max_slots=2 > > node2 slots=2 max_slots=2 > > node3 slots=4 max_slots=4 > > ___ > > > > There are 4 nodes and 9 slots, how do I run my mpirun, for now I use > > > > a) mpirun -np --bynode 4 ./abcd > > I assume you mean "... -np 4 --bynode ..." > > > I know that the slot thingy is for SMPs, and I have tried running > > mpirun -np --byslot 9 ./abcd > > > > and I noticed that its longer when I do --byslot when compared to -- > > bynode > > According to your text, you're running 9 processes when using --byslot > and 4 when using --bynode. Is that a typo? I'll assume that it is -- > that you meant to use 9 in both cases. > > > and I just read the faq that said, by defauly the byslot option is > > used, so I dun have to use it rite,,, > > I'm not sure what your question is. The actual performance may depend > on your application and what its communication and computation > patterns are. It gets more difficult to model when you have a > heterogeneous setup (like it looks like you have, per your hostfile). > > Let's take your example of 9 processes. > > - With --bynode, the MPI_COMM_WORLD ranks will be laid out as follows > (MCRW = "MPI_COMM_WORLD rank") > > node0: MCWR 0 > node1: MCWR 1, MCWR 4 > node2: MCWR 2, MCWR 5 > node3: MCRW 3, MCRW 6, MCWR 7, MCWR 8 > > - With --byslot, it'll look like this: > > node0: MCWR 0 > node1: MCWR 1, MCWR 2 > node2: MCWR 3, MCWR 4 > node3: MCRW 5, MCRW 6, MCWR 7, MCWR 8 > > In short, OMPI is doing round-robin placement of your processes; the > only difference is in which dimension is traversed first: by node or > by slot. > > As to why there's such a performance difference, it could depend on a > lot of things: the difference in computational speed and/or RAM on > your 4 nodes, the changing communication patterns between the two > (shared memory is usually used for on-node communication, which is > usually faster than most networks), etc. It really depends on what > your application is *doing*. > > Sorry I can't be of more help... > > -- > Jeff Squyres > Cisco Systems > > ___ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users >
