Sachin, I am able to reproduce something funny. Looks like your issue. When I run on a single host with two ranks, the test works fine. However, when I try three or more, it looks like only the root, rank 0, is making any progress after the first iteration.
$/hpc/mtl_scrap/users/joshual/openmpi-1.8.4/ompi_install/bin/mpirun -np 3 -mca btl self,sm ./bcast_loop rank 0, m = 0 rank 1, m = 0 rank 2, m = 0 rank 0, m = 1000 rank 0, m = 2000 rank 0, m = 3000 rank 0, m = 4000 rank 0, m = 5000 rank 0, m = 6000 rank 0, m = 7000 rank 0, m = 8000 rank 0, m = 9000 rank 0, m = 10000 rank 0, m = 11000 rank 0, m = 12000 rank 0, m = 13000 rank 0, m = 14000 rank 0, m = 15000 rank 0, m = 16000 <----- Hanging After hanging for a while, I get an OOM kernel panic message: joshual@mngx-apl-01 ~ $ Message from syslogd@localhost at Feb 23 22:42:17 ... kernel:Kernel panic - not syncing: Out of memory: system-wide panic_on_oom is enabled Message from syslogd@localhost at Feb 23 22:42:17 ... kernel: With TCP BTL the result is sensible, i.e. I see three ranks reporting for each multiple of 1000: $/hpc/mtl_scrap/users/joshual/openmpi-1.8.4/ompi_install/bin/mpirun -np 3 -mca btl self,tcp ./a.out rank 1, m = 0 rank 2, m = 0 rank 0, m = 0 rank 0, m = 1000 rank 2, m = 1000 rank 1, m = 1000 rank 1, m = 2000 rank 0, m = 2000 rank 2, m = 2000 rank 0, m = 3000 rank 2, m = 3000 rank 1, m = 3000 rank 0, m = 4000 rank 1, m = 4000 rank 2, m = 4000 rank 0, m = 5000 rank 2, m = 5000 rank 1, m = 5000 rank 0, m = 6000 rank 1, m = 6000 rank 2, m = 6000 rank 2, m = 7000 rank 1, m = 7000 rank 0, m = 7000 rank 0, m = 8000 rank 2, m = 8000 rank 1, m = 8000 rank 0, m = 9000 rank 2, m = 9000 rank 1, m = 9000 rank 2, m = 10000 rank 0, m = 10000 rank 1, m = 10000 rank 1, m = 11000 rank 0, m = 11000 rank 2, m = 11000 rank 2, m = 12000 rank 1, m = 12000 rank 0, m = 12000 rank 1, m = 13000 rank 0, m = 13000 rank 2, m = 13000 rank 1, m = 14000 rank 2, m = 14000 rank 0, m = 14000 rank 1, m = 15000 rank 0, m = 15000 rank 2, m = 15000 etc... It looks like a bug in the SM BTL. I can poke some more at this tomorrow. Josh On Sun, Feb 22, 2015 at 11:18 PM, Sachin Krishnan <sachk...@gmail.com> wrote: > George, > > I was able to run the code without any errors in an older version of > OpenMPI in another machine. It looks like some problem with my machine like > Josh pointed out. > > Adding --mca coll tuned or basic to the mpirun command resulted in an > MPI_Init failed error with the following additional information for the > Open MPI developer: > > mca_coll_base_comm_select(MPI_COMM_WORLD) failed > --> Returned "Not found" (-13) instead of "Success" (0) > > Thanks for the help. > > Sachin > > On Mon, Feb 23, 2015 at 4:17 AM, George Bosilca <bosi...@icl.utk.edu> > wrote: > >> Sachin, >> >> I cant replicate your issue neither with the latest 1.8 nor with the >> trunk. I tried using a single host, while forcing SM and then TP to no >> avail. >> >> Can you try restricting the collective modules in use (adding --mca coll >> tuned,basic) to your mpirun command? >> >> George. >> >> >> On Fri, Feb 20, 2015 at 9:31 PM, Sachin Krishnan <sachk...@gmail.com> >> wrote: >> >>> Josh, >>> >>> Thanks for the help. >>> I'm running on a single host. How do I confirm that it is an issue with >>> the shared memory? >>> >>> Sachin >>> >>> On Fri, Feb 20, 2015 at 11:58 PM, Joshua Ladd <jladd.m...@gmail.com> >>> wrote: >>> >>>> Sachin, >>>> >>>> Are you running this on a single host or across multiple hosts (i.e. >>>> are you communicating between processes via networking.) If it's on a >>>> single host, then it might be an issue with shared memory. >>>> >>>> Josh >>>> >>>> On Fri, Feb 20, 2015 at 1:51 AM, Sachin Krishnan <sachk...@gmail.com> >>>> wrote: >>>> >>>>> Hello Josh, >>>>> >>>>> The command i use to compile the code is: >>>>> >>>>> mpicc bcast_loop.c >>>>> >>>>> >>>>> To run the code I use: >>>>> >>>>> mpirun -np 2 ./a.out >>>>> >>>>> Output is unpredictable. It gets stuck at different places. >>>>> >>>>> Im attaching lstopo and ompi_info outputs. Do you need any other info? >>>>> >>>>> >>>>> lstopo-no-graphics output: >>>>> >>>>> Machine (3433MB) >>>>> >>>>> Socket L#0 + L3 L#0 (8192KB) >>>>> >>>>> L2 L#0 (256KB) + L1d L#0 (32KB) + L1i L#0 (32KB) + Core L#0 >>>>> >>>>> PU L#0 (P#0) >>>>> >>>>> PU L#1 (P#4) >>>>> >>>>> L2 L#1 (256KB) + L1d L#1 (32KB) + L1i L#1 (32KB) + Core L#1 >>>>> >>>>> PU L#2 (P#1) >>>>> >>>>> PU L#3 (P#5) >>>>> >>>>> L2 L#2 (256KB) + L1d L#2 (32KB) + L1i L#2 (32KB) + Core L#2 >>>>> >>>>> PU L#4 (P#2) >>>>> >>>>> PU L#5 (P#6) >>>>> >>>>> L2 L#3 (256KB) + L1d L#3 (32KB) + L1i L#3 (32KB) + Core L#3 >>>>> >>>>> PU L#6 (P#3) >>>>> >>>>> PU L#7 (P#7) >>>>> >>>>> HostBridge L#0 >>>>> >>>>> PCI 8086:0162 >>>>> >>>>> GPU L#0 "card0" >>>>> >>>>> GPU L#1 "renderD128" >>>>> >>>>> GPU L#2 "controlD64" >>>>> >>>>> PCI 8086:1502 >>>>> >>>>> Net L#3 "eth0" >>>>> >>>>> PCI 8086:1e02 >>>>> >>>>> Block L#4 "sda" >>>>> >>>>> Block L#5 "sr0" >>>>> >>>>> >>>>> ompi_info output: >>>>> >>>>> >>>>> Package: Open MPI builduser@anatol 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: /usr >>>>> >>>>> Configured architecture: i686-pc-linux-gnu >>>>> >>>>> Configure host: anatol >>>>> >>>>> Configured by: builduser >>>>> >>>>> Configured on: Sat Dec 20 17:00:34 PST 2014 >>>>> >>>>> Configure host: anatol >>>>> >>>>> Built by: builduser >>>>> >>>>> Built on: Sat Dec 20 17:12:16 PST 2014 >>>>> >>>>> Built host: anatol >>>>> >>>>> C bindings: yes >>>>> >>>>> C++ bindings: yes >>>>> >>>>> Fort mpif.h: yes (all) >>>>> >>>>> Fort use mpi: yes (full: ignore TKR) >>>>> >>>>> Fort use mpi size: deprecated-ompi-info-value >>>>> >>>>> Fort use mpi_f08: yes >>>>> >>>>> Fort mpi_f08 compliance: The mpi_f08 module is available, but due to >>>>> >>>>> limitations in the /usr/bin/gfortran >>>>> compiler, does >>>>> >>>>> not support the following: array subsections, >>>>> >>>>> direct passthru (where possible) to >>>>> underlying Open >>>>> >>>>> MPI's C functionality >>>>> >>>>> 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: 4.9.2 >>>>> >>>>> C++ compiler: g++ >>>>> >>>>> C++ compiler absolute: /usr/bin/g++ >>>>> >>>>> Fort compiler: /usr/bin/gfortran >>>>> >>>>> Fort compiler abs: >>>>> >>>>> Fort ignore TKR: yes (!GCC$ ATTRIBUTES NO_ARG_CHECK ::) >>>>> >>>>> Fort 08 assumed shape: yes >>>>> >>>>> Fort optional args: yes >>>>> >>>>> Fort INTERFACE: yes >>>>> >>>>> Fort ISO_FORTRAN_ENV: yes >>>>> >>>>> Fort STORAGE_SIZE: yes >>>>> >>>>> Fort BIND(C) (all): yes >>>>> >>>>> Fort ISO_C_BINDING: yes >>>>> >>>>> Fort SUBROUTINE BIND(C): yes >>>>> >>>>> Fort TYPE,BIND(C): yes >>>>> >>>>> Fort T,BIND(C,name="a"): yes >>>>> >>>>> Fort PRIVATE: yes >>>>> >>>>> Fort PROTECTED: yes >>>>> >>>>> Fort ABSTRACT: yes >>>>> >>>>> Fort ASYNCHRONOUS: yes >>>>> >>>>> Fort PROCEDURE: yes >>>>> >>>>> Fort C_FUNLOC: yes >>>>> >>>>> Fort f08 using wrappers: yes >>>>> >>>>> Fort MPI_SIZEOF: yes >>>>> >>>>> C profiling: yes >>>>> >>>>> C++ profiling: yes >>>>> >>>>> Fort mpif.h profiling: yes >>>>> >>>>> Fort use mpi profiling: yes >>>>> >>>>> Fort use mpi_f08 prof: yes >>>>> >>>>> C++ exceptions: no >>>>> >>>>> Thread support: posix (MPI_THREAD_MULTIPLE: no, 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: no >>>>> >>>>> 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: external (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 memchecker: valgrind (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: 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 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 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: 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: 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: grdma (MCA v2.0, API v2.0, Component v1.8.4) >>>>> >>>>> MCA mpool: sm (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) >>>>> >>>>> Sachin >>>>> >>>>> >Sachin, >>>>> >>>>> >Can you, please, provide a command line? Additional information about >>>>> your >>>>> >system could be helpful also. >>>>> >>>>> >Josh >>>>> >>>>> >>On Wed, Feb 18, 2015 at 3:43 AM, Sachin Krishnan >>>>> <sachkris_at_[hidden]> wrote: >>>>> >>>>> >> Hello, >>>>> >> >>>>> >> I am new to MPI and also this list. >>>>> >> I wrote an MPI code with several MPI_Bcast calls in a loop. My code >>>>> was >>>>> >> getting stuck at random points, ie it was not systematic. After a >>>>> few hours >>>>> >> of debugging and googling, I found that the issue may be with the >>>>> several >>>>> >> MPI_Bcast calls in a loop. >>>>> >> >>>>> >> I stumbled on this test code which can reproduce the issue: >>>>> >> >>>>> https://github.com/fintler/ompi/blob/master/orte/test/mpi/bcast_loop.c >>>>> >>>>> >> >>>>> >> Im using OpenMPI v1.8.4 installed from official Arch Linux repo. >>>>> >> >>>>> >> Is it a known issue with OpenMPI? >>>>> >> Is it some problem with the way openmpi is configured in my system? >>>>> >> >>>>> >> Thanks in advance. >>>>> >> >>>>> >> Sachin >>>>> >> >>>>> >> >>>>> >> >>>>> >> _______________________________________________ >>>>> >> users mailing list >>>>> >> users_at_[hidden] >>>>> >> Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users >>>>> >> Link to this post: >>>>> >> http://www.open-mpi.org/community/lists/users/2015/02/26338.php >>>>> >> >>>>> >>>>> _______________________________________________ >>>>> 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/2015/02/26363.php >>>>> >>>> >>>> >>>> _______________________________________________ >>>> 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/2015/02/26366.php >>>> >>> >>> >>> _______________________________________________ >>> 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/2015/02/26367.php >>> >> >> >> _______________________________________________ >> 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/2015/02/26368.php >> > > > _______________________________________________ > 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/2015/02/26369.php >
