Starting in the 1.7 series, Open MPI automatically binds application processes. By default, we bind to core if np <= 2, otherwise we bind to socket.. So your proc, and all its threads, are being bound to a single core.
What you probably want to do is add either "--bind-to none" or "--bind-to socket" to your mpirun cmd line. On Fri, Jun 26, 2015 at 2:00 AM, Fedele Stabile < fedele.stab...@fis.unical.it> wrote: > Hi, > I'm trying hybrid programming and I have this strange issue: > Running fortran code listed below it happens that it uses only the 200% > of cpu on each node also if I request 4 threads with the command > mpirun -n 2 -npernode 1 -x OMP_NUM_THREADS=4 ./pi_parallel_do.f.exe > I'll explain: four threads are created but it works as if they were only > two cores available > > however if I run the OpenMP version it loads 400% of cpu, so it works on > four core. > This is the code and below is the output of ompi_info (as requested by > Howard Pritchard) > $ cat pi_parallel_do.f > PROGRAM Compute_PI > IMPLICIT NONE > include "mpif.h" > integer numprocs, rank, ierr > INTEGER*8 N, i > DOUBLE PRECISION w, x, sum > DOUBLE PRECISION pi, mypi > double precision n_mpi, pi_mpi > call MPI_Init(ierr) > call MPI_Comm_size(MPI_COMM_WORLD, numprocs, ierr) > call MPI_Comm_rank(MPI_COMM_WORLD, rank, ierr) > N = 500000000 !! Number of intervals > w = 1.0d0/(1.d0*N) !! width of each interval > sum = 0.0d0 > pi_mpi = 0.0 > !$OMP PARALLEL PRIVATE(x, mypi) > mypi = 0.0d0 > !$OMP DO > DO i = 0, N-1 !! Parallel Loop > x = w * (i + 0.5d0) > mypi = mypi + w*4.d0/(1.d0 + x * x) > END DO > !$OMP END DO > !$OMP CRITICAL > pi_mpi = pi_mpi + mypi > !$OMP END CRITICAL > !$OMP END PARALLEL > call mpi_reduce(pi_mpi, pi, 1, MPI_DOUBLE_PRECISION, MPI_SUM, 0, > MPI_COMM_WORLD, ierr) > PRINT *, "Pi = ", pi > call MPI_Finalize(ierr) > END PROGRAM > > and output of ompi_info: > $ ompi_info > Package: Open MPI root@newton-s Distribution > Open MPI: 1.8.4 > Open MPI repo revision: v1.8.3-330-g0344f04 > Open MPI release date: Dec 19, 2014 > Open RTE: 1.8.4 > Open RTE repo revision: v1.8.3-330-g0344f04 > Open RTE release date: Dec 19, 2014 > OPAL: 1.8.4 > OPAL repo revision: v1.8.3-330-g0344f04 > OPAL release date: Dec 19, 2014 > MPI API: 3.0 > Ident string: 1.8.4 > Prefix: /data/apps/mpi/openmpi-1.8.4-gnu > Configured architecture: x86_64-unknown-linux-gnu > Configure host: newton-s > Configured by: root > Configured on: Mon Apr 13 18:29:51 CEST 2015 > Configure host: newton-s > Built by: root > Built on: lun 13 apr 2015, 18.42.15, CEST > Built host: newton-s > C bindings: yes > C++ bindings: yes > Fort mpif.h: yes (all) > Fort use mpi: yes (limited: overloading) > Fort use mpi size: deprecated-ompi-info-value > Fort use mpi_f08: no > Fort mpi_f08 compliance: The mpi_f08 module was not built > Fort mpi_f08 subarrays: no > Java bindings: no > Wrapper compiler rpath: runpath > C compiler: gcc > C compiler absolute: /usr/bin/gcc > C compiler family name: GNU > C compiler version: 4.4.7 > C++ compiler: g++ > C++ compiler absolute: /usr/bin/g++ > Fort compiler: gfortran > Fort compiler abs: /usr/bin/gfortran > Fort ignore TKR: no > Fort 08 assumed shape: no > Fort optional args: no > Fort INTERFACE: yes > Fort ISO_FORTRAN_ENV: no > Fort STORAGE_SIZE: no > Fort BIND(C) (all): no > Fort ISO_C_BINDING: yes > Fort SUBROUTINE BIND(C): no > Fort TYPE,BIND(C): no > Fort T,BIND(C,name="a"): no > Fort PRIVATE: no > Fort PROTECTED: no > Fort ABSTRACT: no > Fort ASYNCHRONOUS: no > Fort PROCEDURE: no > Fort C_FUNLOC: no > Fort f08 using wrappers: no > Fort MPI_SIZEOF: no > C profiling: yes > C++ profiling: yes > Fort mpif.h profiling: yes > Fort use mpi profiling: yes > Fort use mpi_f08 prof: no > C++ exceptions: no > Thread support: posix (MPI_THREAD_MULTIPLE: yes, OPAL support: > yes, > OMPI progress: no, ORTE progress: yes, Event > lib: > yes) > Sparse Groups: no > Internal debug support: no > MPI interface warnings: yes > MPI parameter check: runtime > Memory profiling support: no > Memory debugging support: no > libltdl support: yes > Heterogeneous support: no > mpirun default --prefix: yes > MPI I/O support: yes > MPI_WTIME support: gettimeofday > Symbol vis. support: yes > Host topology support: yes > MPI extensions: > FT Checkpoint support: no (checkpoint thread: no) > C/R Enabled Debugging: no > VampirTrace support: yes > MPI_MAX_PROCESSOR_NAME: 256 > MPI_MAX_ERROR_STRING: 256 > MPI_MAX_OBJECT_NAME: 64 > MPI_MAX_INFO_KEY: 36 > MPI_MAX_INFO_VAL: 256 > MPI_MAX_PORT_NAME: 1024 > MPI_MAX_DATAREP_STRING: 128 > MCA backtrace: execinfo (MCA v2.0, API v2.0, Component > v1.8.4) > MCA compress: bzip (MCA v2.0, API v2.0, Component v1.8.4) > MCA compress: gzip (MCA v2.0, API v2.0, Component v1.8.4) > MCA crs: none (MCA v2.0, API v2.0, Component v1.8.4) > MCA db: hash (MCA v2.0, API v1.0, Component v1.8.4) > MCA db: print (MCA v2.0, API v1.0, Component v1.8.4) > MCA event: libevent2021 (MCA v2.0, API v2.0, Component > v1.8.4) > MCA hwloc: hwloc191 (MCA v2.0, API v2.0, Component > v1.8.4) > MCA if: posix_ipv4 (MCA v2.0, API v2.0, Component > v1.8.4) > MCA if: linux_ipv6 (MCA v2.0, API v2.0, Component > v1.8.4) > MCA installdirs: env (MCA v2.0, API v2.0, Component v1.8.4) > MCA installdirs: config (MCA v2.0, API v2.0, Component v1.8.4) > MCA memory: linux (MCA v2.0, API v2.0, Component v1.8.4) > MCA pstat: linux (MCA v2.0, API v2.0, Component v1.8.4) > MCA sec: basic (MCA v2.0, API v1.0, Component v1.8.4) > MCA shmem: mmap (MCA v2.0, API v2.0, Component v1.8.4) > MCA shmem: posix (MCA v2.0, API v2.0, Component v1.8.4) > MCA shmem: sysv (MCA v2.0, API v2.0, Component v1.8.4) > MCA timer: linux (MCA v2.0, API v2.0, Component v1.8.4) > MCA dfs: app (MCA v2.0, API v1.0, Component v1.8.4) > MCA dfs: orted (MCA v2.0, API v1.0, Component v1.8.4) > MCA dfs: test (MCA v2.0, API v1.0, Component v1.8.4) > MCA errmgr: default_app (MCA v2.0, API v3.0, Component > v1.8.4) > MCA errmgr: default_hnp (MCA v2.0, API v3.0, Component > v1.8.4) > MCA errmgr: default_orted (MCA v2.0, API v3.0, Component > v1.8.4) > MCA errmgr: default_tool (MCA v2.0, API v3.0, Component > v1.8.4) > MCA ess: env (MCA v2.0, API v3.0, Component v1.8.4) > MCA ess: hnp (MCA v2.0, API v3.0, Component v1.8.4) > MCA ess: singleton (MCA v2.0, API v3.0, Component > v1.8.4) > MCA ess: slurm (MCA v2.0, API v3.0, Component v1.8.4) > MCA ess: tm (MCA v2.0, API v3.0, Component v1.8.4) > MCA ess: tool (MCA v2.0, API v3.0, Component v1.8.4) > MCA filem: raw (MCA v2.0, API v2.0, Component v1.8.4) > MCA grpcomm: bad (MCA v2.0, API v2.0, Component v1.8.4) > MCA iof: hnp (MCA v2.0, API v2.0, Component v1.8.4) > MCA iof: mr_hnp (MCA v2.0, API v2.0, Component v1.8.4) > MCA iof: mr_orted (MCA v2.0, API v2.0, Component > v1.8.4) > MCA iof: orted (MCA v2.0, API v2.0, Component v1.8.4) > MCA iof: tool (MCA v2.0, API v2.0, Component v1.8.4) > MCA odls: default (MCA v2.0, API v2.0, Component v1.8.4) > MCA oob: tcp (MCA v2.0, API v2.0, Component v1.8.4) > MCA plm: isolated (MCA v2.0, API v2.0, Component > v1.8.4) > MCA plm: rsh (MCA v2.0, API v2.0, Component v1.8.4) > MCA plm: slurm (MCA v2.0, API v2.0, Component v1.8.4) > MCA plm: tm (MCA v2.0, API v2.0, Component v1.8.4) > MCA ras: loadleveler (MCA v2.0, API v2.0, Component > v1.8.4) > MCA ras: simulator (MCA v2.0, API v2.0, Component > v1.8.4) > MCA ras: slurm (MCA v2.0, API v2.0, Component v1.8.4) > MCA ras: tm (MCA v2.0, API v2.0, Component v1.8.4) > MCA rmaps: lama (MCA v2.0, API v2.0, Component v1.8.4) > MCA rmaps: mindist (MCA v2.0, API v2.0, Component v1.8.4) > MCA rmaps: ppr (MCA v2.0, API v2.0, Component v1.8.4) > MCA rmaps: rank_file (MCA v2.0, API v2.0, Component > v1.8.4) > MCA rmaps: resilient (MCA v2.0, API v2.0, Component > v1.8.4) > MCA rmaps: round_robin (MCA v2.0, API v2.0, Component > v1.8.4) > MCA rmaps: seq (MCA v2.0, API v2.0, Component v1.8.4) > MCA rmaps: staged (MCA v2.0, API v2.0, Component v1.8.4) > MCA rml: oob (MCA v2.0, API v2.0, Component v1.8.4) > MCA routed: binomial (MCA v2.0, API v2.0, Component > v1.8.4) > MCA routed: debruijn (MCA v2.0, API v2.0, Component > v1.8.4) > MCA routed: direct (MCA v2.0, API v2.0, Component v1.8.4) > MCA routed: radix (MCA v2.0, API v2.0, Component v1.8.4) > MCA state: app (MCA v2.0, API v1.0, Component v1.8.4) > MCA state: hnp (MCA v2.0, API v1.0, Component v1.8.4) > MCA state: novm (MCA v2.0, API v1.0, Component v1.8.4) > MCA state: orted (MCA v2.0, API v1.0, Component v1.8.4) > MCA state: staged_hnp (MCA v2.0, API v1.0, Component > v1.8.4) > MCA state: staged_orted (MCA v2.0, API v1.0, Component > v1.8.4) > MCA state: tool (MCA v2.0, API v1.0, Component v1.8.4) > MCA allocator: basic (MCA v2.0, API v2.0, Component v1.8.4) > MCA allocator: bucket (MCA v2.0, API v2.0, Component v1.8.4) > MCA bcol: basesmuma (MCA v2.0, API v2.0, Component > v1.8.4) > MCA bcol: ptpcoll (MCA v2.0, API v2.0, Component v1.8.4) > MCA bml: r2 (MCA v2.0, API v2.0, Component v1.8.4) > MCA btl: openib (MCA v2.0, API v2.0, Component v1.8.4) > MCA btl: self (MCA v2.0, API v2.0, Component v1.8.4) > MCA btl: sm (MCA v2.0, API v2.0, Component v1.8.4) > MCA btl: smcuda (MCA v2.0, API v2.0, Component v1.8.4) > MCA btl: tcp (MCA v2.0, API v2.0, Component v1.8.4) > MCA btl: vader (MCA v2.0, API v2.0, Component v1.8.4) > MCA coll: basic (MCA v2.0, API v2.0, Component v1.8.4) > MCA coll: hierarch (MCA v2.0, API v2.0, Component > v1.8.4) > MCA coll: inter (MCA v2.0, API v2.0, Component v1.8.4) > MCA coll: libnbc (MCA v2.0, API v2.0, Component v1.8.4) > MCA coll: ml (MCA v2.0, API v2.0, Component v1.8.4) > MCA coll: self (MCA v2.0, API v2.0, Component v1.8.4) > MCA coll: sm (MCA v2.0, API v2.0, Component v1.8.4) > MCA coll: tuned (MCA v2.0, API v2.0, Component v1.8.4) > MCA dpm: orte (MCA v2.0, API v2.0, Component v1.8.4) > MCA fbtl: posix (MCA v2.0, API v2.0, Component v1.8.4) > MCA fcoll: dynamic (MCA v2.0, API v2.0, Component v1.8.4) > MCA fcoll: individual (MCA v2.0, API v2.0, Component > v1.8.4) > MCA fcoll: static (MCA v2.0, API v2.0, Component v1.8.4) > MCA fcoll: two_phase (MCA v2.0, API v2.0, Component > v1.8.4) > MCA fcoll: ylib (MCA v2.0, API v2.0, Component v1.8.4) > MCA fs: ufs (MCA v2.0, API v2.0, Component v1.8.4) > MCA io: ompio (MCA v2.0, API v2.0, Component v1.8.4) > MCA io: romio (MCA v2.0, API v2.0, Component v1.8.4) > MCA mpool: gpusm (MCA v2.0, API v2.0, Component v1.8.4) > MCA mpool: grdma (MCA v2.0, API v2.0, Component v1.8.4) > MCA mpool: rgpusm (MCA v2.0, API v2.0, Component v1.8.4) > MCA mpool: sm (MCA v2.0, API v2.0, Component v1.8.4) > MCA mtl: psm (MCA v2.0, API v2.0, Component v1.8.4) > MCA osc: rdma (MCA v2.0, API v3.0, Component v1.8.4) > MCA osc: sm (MCA v2.0, API v3.0, Component v1.8.4) > MCA pml: v (MCA v2.0, API v2.0, Component v1.8.4) > MCA pml: bfo (MCA v2.0, API v2.0, Component v1.8.4) > MCA pml: cm (MCA v2.0, API v2.0, Component v1.8.4) > MCA pml: ob1 (MCA v2.0, API v2.0, Component v1.8.4) > MCA pubsub: orte (MCA v2.0, API v2.0, Component v1.8.4) > MCA rcache: vma (MCA v2.0, API v2.0, Component v1.8.4) > MCA rte: orte (MCA v2.0, API v2.0, Component v1.8.4) > MCA sbgp: basesmsocket (MCA v2.0, API v2.0, Component > v1.8.4) > MCA sbgp: basesmuma (MCA v2.0, API v2.0, Component > v1.8.4) > MCA sbgp: p2p (MCA v2.0, API v2.0, Component v1.8.4) > MCA sharedfp: individual (MCA v2.0, API v2.0, Component > v1.8.4) > MCA sharedfp: lockedfile (MCA v2.0, API v2.0, Component > v1.8.4) > MCA sharedfp: sm (MCA v2.0, API v2.0, Component v1.8.4) > MCA topo: basic (MCA v2.0, API v2.1, Component v1.8.4) > MCA vprotocol: pessimist (MCA v2.0, API v2.0, Component > v1.8.4) > > > > > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2015/06/27201.php >
