Thanks a lot, it works fine for me. But going back to my problems - is it some bug in open-mpi or I should use "slot=*" option in some other way?
2010/6/9 Ralph Castain <r...@open-mpi.org>: > I would recommend using the sequential mapper instead: > > mpirun -mca rmaps seq > > You can then just list your hosts in your hostfile, and we will put the ranks > sequentially on those hosts. So you get something like this > > host01 <= rank0 > host01 <= rank1 > host02 <= rank2 > host03 <= rank3 > host01 <= rank4 > > Ralph > > On Jun 9, 2010, at 4:39 AM, Grzegorz Maj wrote: > >> In my previous mail I said that slot=0-3 would be a solution. >> Unfortunately it gives me exactly the same segfault as in case with >> *:* >> >> 2010/6/9 Grzegorz Maj <ma...@wp.pl>: >>> Hi, >>> I'd like mpirun to run tasks with specific ranks on specific hosts, >>> but I don't want to provide any particular sockets/slots/cores. >>> The following example uses just one host, but generally I'll use more. >>> In my hostfile I just have: >>> >>> root@host01 slots=4 >>> >>> I was playing with my rankfile to achieve what I've mentioned, but I >>> always get some problems. >>> >>> 1) With rankfile like: >>> rank 0=host01 slot=* >>> rank 1=host01 slot=* >>> rank 2=host01 slot=* >>> rank 3=host01 slot=* >>> >>> I get: >>> >>> -------------------------------------------------------------------------- >>> We were unable to successfully process/set the requested processor >>> affinity settings: >>> >>> Specified slot list: * >>> Error: Error >>> >>> This could mean that a non-existent processor was specified, or >>> that the specification had improper syntax. >>> -------------------------------------------------------------------------- >>> -------------------------------------------------------------------------- >>> mpirun was unable to start the specified application as it encountered an >>> error: >>> >>> Error name: Error >>> Node: host01 >>> >>> when attempting to start process rank 0. >>> -------------------------------------------------------------------------- >>> [host01:13715] Rank 0: PAFFINITY cannot get physical processor id for >>> logical processor 4 >>> >>> >>> I think it tries to find processor #4, bug there are only 0-3 >>> >>> 2) With rankfile like: >>> rank 0=host01 slot=*:* >>> rank 1=host01 slot=*:* >>> rank 2=host01 slot=*:* >>> rank 3=host01 slot=*:* >>> >>> Everything looks well, i.e. my programs are spread across 4 processors. >>> But when running MPI program as follows: >>> >>> MPI::Init(argc, argv); >>> fprintf(stderr, "after init %d\n", MPI::Is_initialized()); >>> nprocs_mpi = MPI::COMM_WORLD.Get_size(); >>> fprintf(stderr, "won't get here\n"); >>> >>> I get: >>> >>> after init 1 >>> [host01:14348] *** Process received signal *** >>> [host01:14348] Signal: Segmentation fault (11) >>> [host01:14348] Signal code: Address not mapped (1) >>> [host01:14348] Failing at address: 0x8 >>> [host01:14348] [ 0] [0xffffe410] >>> [host01:14348] [ 1] p(_ZNK3MPI4Comm8Get_sizeEv+0x19) [0x8051299] >>> [host01:14348] [ 2] p(main+0x86) [0x804ee4e] >>> [host01:14348] [ 3] /lib/libc.so.6(__libc_start_main+0xe5) [0x4180b5c5] >>> [host01:14348] [ 4] p(__gxx_personality_v0+0x125) [0x804ecc1] >>> [host01:14348] *** End of error message *** >>> >>> I'm using OPEN MPI v. 1.4.2 (downloaded yesterday). >>> In my rankfile I really want to write something like slot=*. I know >>> slot=0-3 would be a solution, but when generating rankfile I may not >>> be sure how many processors are there available on a particular host. >>> >>> Any help would be appreciated. >>> >>> Regards, >>> Grzegorz Maj >>> >> _______________________________________________ >> 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 > >
