Hahaha, ok then that WAS silly! :D So there is no way to utilize both cores with mpi?
Ah well, I'll correct that. >From console, im starting a job like this: mpirun -np 4 Program, where i want to run a Program on 4 processors. I was just stumbled when i got same output 4 times, like there are 4 processes ranked 0. While with the old version of mpi (1.2) same execution would give 4 processes ranked 0..3. Hope you see my question. On Sat, Apr 17, 2010 at 6:29 PM, Ralph Castain <r...@open-mpi.org> wrote: > > On Apr 17, 2010, at 1:16 AM, Mario Ogrizek wrote: > > I am new to mpi, so I'm sorry for any silly questions. > > My idea was to try to use dual core machine as two nodes. I have a limited > access to a cluster, so this was just for "testing" purposes. > My default hostfile contains usual comments and this two nodes: > > node0 > node1 > > I thought that each processor is a node for MPI purpose. > > > I'm afraid not - it is just another processor on that node. So you only > have one node as far as OMPI is concerned. > > Im not sure what do you mean with "mpirun cmd line"? > > > How are you starting your job? The usual way is with "mpirun -n N ...". > That is what we mean by the "mpirun cmd line" - i.e., what command are you > using to start your job? > > It sounds like things are actually working correctly. You might look at > "mpirun -h" for possible options of interest. > > > > Regards, > > Mario > > On Sat, Apr 17, 2010 at 1:54 AM, Ralph Castain <r...@open-mpi.org> wrote: > >> >> On Apr 16, 2010, at 5:08 PM, Mario Ogrizek wrote: >> >> I checked the default MCA param file, and found it was there that was >> (automatically) specified as a relative path, so i changed it. >> So now, it works, altho, still something is not right. >> Seems like its creating 4 times only 1 process. >> Not sure if it has to do something with my hostfile, it contains: >> >> node0 >> node1 >> >> I am running this on a simple dualcore machine, so i specified it as a >> localhost with two nodes. >> >> >> I don't understand this comment - a dual core machine would still be a >> single node. Just happens to have two processors in it. >> >> Could you send the contents of your hostfile and your mpirun cmd line? >> >> >> Regards, >> >> Mario >> >> On Sat, Apr 17, 2010 at 12:52 AM, Mario Ogrizek <mario.guard...@gmail.com >> > wrote: >> >>> I understand, so, its looking for a >>> working_dir/usr/local/etc/openmpi-default-hostfile >>> I managed to run a hello world program from the console, while my wd was >>> just "/" and it worked, altho strangely... >>> example for 4 procs: >>> >>> Hello MPI World From process 0: Num processes: 1 >>> Hello MPI World From process 0: Num processes: 1 >>> Hello MPI World From process 0: Num processes: 1 >>> Hello MPI World From process 0: Num processes: 1 >>> >>> So, you are saying i allways have to be in "/" to run mpi programs, or >>> there is a way for mpi to search absolute path? >>> It seems pretty inconvinient this way. >>> I think v 1.2 didnt have this limitation. >>> >>> Does this have to do anything with LD_LIBRARY_PATH? >>> >>> Regards, >>> >>> Mario >>> >>> On Fri, Apr 16, 2010 at 7:46 PM, Ralph Castain <r...@open-mpi.org> wrote: >>> >>>> How did you specify it? Command line? Default MCA param file? >>>> >>>> On Apr 16, 2010, at 11:44 AM, Mario Ogrizek wrote: >>>> >>>> Any idea how to solve this? >>>> >>>> On Fri, Apr 16, 2010 at 7:40 PM, Timur Magomedov < >>>> timur.magome...@developonbox.ru> wrote: >>>> >>>>> Hello. >>>>> It looks that you hostfile path should >>>>> be /usr/local/etc/openmpi-default-hostfile not >>>>> usr/local/etc/openmpi-default-hostfile but somehow Open MPI gets the >>>>> second path. >>>>> >>>>> В Птн, 16/04/2010 в 19:10 +0200, Mario Ogrizek пишет: >>>>> > Well, im not sure why should i name it /openmpi-default-hostfile >>>>> > Especially, because mpirun v1.2 executes without any errors. >>>>> > But, i made a copy named /openmpi-default-hostfile, and still, the >>>>> > same result. >>>>> > >>>>> > This is the whole error message for a simple hello world program: >>>>> > >>>>> > >>>>> > Open RTE was unable to open the hostfile: >>>>> > usr/local/etc/openmpi-default-hostfile >>>>> > Check to make sure the path and filename are correct. >>>>> > >>>>> -------------------------------------------------------------------------- >>>>> > [Mario.local:04300] [[114,0],0] ORTE_ERROR_LOG: Not found in file >>>>> > base/ras_base_allocate.c at line 186 >>>>> > [Mario.local:04300] [[114,0],0] ORTE_ERROR_LOG: Not found in file >>>>> > base/plm_base_launch_support.c at line 72 >>>>> > [Mario.local:04300] [[114,0],0] ORTE_ERROR_LOG: Not found in file >>>>> > plm_rsh_module.c at line 990 >>>>> > >>>>> -------------------------------------------------------------------------- >>>>> > A daemon (pid unknown) died unexpectedly on signal 1 while >>>>> attempting >>>>> > to >>>>> > launch so we are aborting. >>>>> > >>>>> > >>>>> > There may be more information reported by the environment (see >>>>> above). >>>>> > >>>>> > >>>>> > This may be because the daemon was unable to find all the needed >>>>> > shared >>>>> > libraries on the remote node. You may set your LD_LIBRARY_PATH to >>>>> have >>>>> > the >>>>> > location of the shared libraries on the remote nodes and this will >>>>> > automatically be forwarded to the remote nodes. >>>>> > >>>>> -------------------------------------------------------------------------- >>>>> > >>>>> -------------------------------------------------------------------------- >>>>> > mpirun noticed that the job aborted, but has no info as to the >>>>> process >>>>> > that caused that situation. >>>>> > >>>>> -------------------------------------------------------------------------- >>>>> > mpirun: clean termination accomplished >>>>> > >>>>> > >>>>> > >>>>> > >>>>> > ps. PTP is a parallel tools platform plugin for eclipse >>>>> > >>>>> > >>>>> > Regards, >>>>> > >>>>> > >>>>> > Mario >>>>> > >>>>> > _______________________________________________ >>>>> > users mailing list >>>>> > us...@open-mpi.org >>>>> > http://www.open-mpi.org/mailman/listinfo.cgi/users >>>>> >>>>> >>>>> -- >>>>> Kind regards, >>>>> Timur Magomedov >>>>> Senior C++ Developer >>>>> DevelopOnBox LLC / Zodiac Interactive >>>>> http://www.zodiac.tv/ >>>>> >>>>> _______________________________________________ >>>>> 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 >>>> >>>> >>>> >>>> _______________________________________________ >>>> 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 >> >> >> >> _______________________________________________ >> 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 > > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users >
