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From: Frédéric Menou (frederic.menou_at_[hidden])
Date: 2007-01-22 10:23:10


oups! I forgot giving my local configuration :

" LAM/MPI: 7.1.2
              Prefix: /usr/local
        Architecture: i686-pc-linux-gnu
       Configured by: fmenou
       Configured on: Fri Jan 12 18:21:45 CET 2007
      Configure host: fmenou-laptop
      Memory manager: ptmalloc2
          C bindings: yes
        C++ bindings: yes
    Fortran bindings: no
          C compiler: gcc
        C++ compiler: g++
    Fortran compiler: false
     Fortran symbols: none
         C profiling: yes
       C++ profiling: yes
   Fortran profiling: no
      C++ exceptions: no
      Thread support: yes
       ROMIO support: yes
        IMPI support: no
       Debug support: no
        Purify clean: no
            SSI boot: globus (API v1.1, Module v0.6)
            SSI boot: rsh (API v1.1, Module v1.1)
            SSI boot: slurm (API v1.1, Module v1.0)
            SSI coll: lam_basic (API v1.1, Module v7.1)
            SSI coll: shmem (API v1.1, Module v1.0)
            SSI coll: smp (API v1.1, Module v1.2)
             SSI rpi: crtcp (API v1.1, Module v1.1)
             SSI rpi: lamd (API v1.0, Module v7.1)
             SSI rpi: sysv (API v1.0, Module v7.1)
             SSI rpi: tcp (API v1.0, Module v7.1)
             SSI rpi: usysv (API v1.0, Module v7.1)
              SSI cr: self (API v1.0, Module v1.0)"

On 1/22/07, Frédéric Menou <frederic.menou_at_[hidden]> wrote:
> Hi everyone!
>
> (I'm not very experienced in MPI and I didn't check all bugs of
> lam7.1.2 so maybe the problem I want to explain to you is already
> solved)
>
> So,
>
> I have 1 master MPI software, called M, which spawns some slaves of 4
> types A,B,C,D, with card(A) = n and card(B)=card(C)=card(D) = p,
> therefore Size(intercomm) = 1+n+3*p.
>
> After spawning M sends some initialization messages to A's, B's, C's
> and D's depending on their kind. The fact is that As are supposed to
> receive 'long' messages (over 100 chars) while the others only receive
> small messages (<10 chars).
>
> If p >= 5, 'long messages' are truncated with a strange character at
> position 130.
> Messages shorter than 130 are not truncated.
>
> This "bug" (maybe it's my fault but I really don't where I could come
> from) is extremely reproducible. It only appears when p>=5.
>
> One solution would be to cut messages, and therefore bypass bogus
> truncation limit of 130 but I'll be bored to have to...
>
>
> Any help or feedback would be great :)
> --
> Frédéric Menou
>
> _______________________________________________
> This list is archived at http://www.lam-mpi.org/MailArchives/lam/
>

-- 
Frédéric Menou