Thank you. I think one of the problem is my compiler:
I am using absoft verion 8.
I tried lam-7.1.1 compiled with the intel fortran
compiler, it works fine.
Probably something in the latest version of lam hits a
bug in the old absoft compiler.
Anyway, I think my solution now is to use the old lam
version since I haven't had any problem with it.
Thank you very much.
Shi
--- Josh Hursey <jjhursey_at_[hidden]> wrote:
> I ran your sample code with the Absoft Fortran
> compiler on one of our
> machines:
> $ f90 -V
> Absoft 32bit Fortran 95 9.0 r2
> $ mpif77 --showme test.f
> /opt/absoft/bin/f90 -I/my-full-path/local/include
> test.f -lpthread
> -L/my-full-path/local/lib -llammpio -llamf77mpi
> -lmpi -llam -lutil
> -lpthread -lpthread -ldl
>
> I used both the SVN and LAM/MPI 7.1.1 versions, and
> could not replicate
> your problem :( It produced the desired file in all
> cases, without
> hanging.
>
> As far as your output differences:
> The -lpthread duplication should be thrown out by
> the linker.
> -ldl is for dynamic linking and is probably not
> the problem.
>
> humm... As another suggestion for debugging. Try
> copying the compile
> statement generated by "mpif77 -showme" from the
> 7.1.1 version and
> making it exactly like the 7.0.2 version (except for
> PATH items), and
> see if the problem is still occurring. It shouldn't
> make a difference,
> but is worth a try.
>
> Sorry I can't be much more helpful. :(
>
> Josh
>
> On Mar 4, 2005, at 9:46 PM, Shi Jin wrote:
>
> > Thank you.
> >
> > If I remove the include "mpif.h" statement, it
> becomes
> > a simple serial code which runs into no problem.
> >
> > I checked the mpif77 -showme, actually they are
> > showing something a little bit difference:
> > Version 7.0.2:
> > /opt/absoft/bin/f90 -I/opt/lammpi/include
> > -L/opt/lammpi/lib -llamf77mpi -lmpi -llam -lutil
> > -lpthread
> > Version 7.1.1:
> > /opt/absoft/bin/f90 -I/opt/lam711//include
> -lpthread
> > -L/opt/lam711//lib -llamf77mpi -lmpi -llam -lutil
> > -lpthread -lpthread -ldl
> >
> > There is a -ldl which is not in the 7.0.2 version
> and
> > -lpthread duplicated. Will this cause any trouble?
> >
> > I also tried a debugger, there is nothing I can
> found.
> > The 7.1.1 compiled one hung at the write
> statement. I
> > checked the values of the array, they all looked
> > right.
> >
> > Could you please try the toy code I mentioned in
> the
> > original post on a 7.1.1 version?
> > Thank you very much.
> >
> > Shi
> >
> > --- Josh Hursey <jjhursey_at_[hidden]> wrote:
> >> humm... Doesn't seem that the sample piece of
> code
> >> is using any MPI
> >> calls so that eliminates the possibility of the
> >> problem lying in
> >> LAM/MPI libraries. So I would focus on making
> sure
> >> that mpif77 is
> >> configured in a similar manner as before. One
> easy
> >> way to do this is to
> >> "mpif77 -showme" on both installations and
> compare
> >> the results. You
> >> could also try to compile the code not using
> mpif77,
> >> but using your
> >> standard fortran compiler and see if that narrows
> >> down the problem.
> >>
> >> You could also attach to a debugger, and use that
> to
> >> see where it might
> >> be hanging.
> >>
> >> Hope that helps,
> >> Josh
> >>
> >>
> >> On Mar 4, 2005, at 3:44 PM, Shi Jin wrote:
> >>
> >>> Hi, I have some problem with LAM/MPI 7.1.1 in
> >> dumping
> >>> large arrays to a binary file while the same
> works
> >>> with 7.0.2 perfectly. To demenstrate the
> problem,
> >> try
> >>> this tiny toy code:
> >>> program largefile
> >>> implicit none
> >>> include "mpif.h"
> >>> integer,parameter::recordunit=11,N=256
> >>> real(8),allocatable::sepRecord(:)
> >>> allocate(sepRecord(2*N**3))
> >>> sepRecord=1d0
> >>>
> >>> Open (UNIT=recordunit, FILE="largefile.dat",
> >>> STATUS="UNKNOWN", &
> >>> form="unformatted",ACTION="WRITE")
> >>> write(unit=recordunit) sepRecord
> >>> close(recordunit)
> >>>
> >>> deallocate(sepRecord)
> >>> end program
> >>>
> >>> For the LAM/MPI 7.0.2, it writes to a 256MB file
> >> in
> >>> seconds while using versin 7.1.1, the code hangs
> >> and
> >>> takes all the CPU but nothing is written.
> >>>
> >>> Is this a bug in the new version?
> >>> Thanks.
> >>>
> >>> Shi
> >>>
> >>>
> >>>
> >>>
> >>> __________________________________
> >>> Celebrate Yahoo!'s 10th Birthday!
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> >>> _______________________________________________
> >>> This list is archived at
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> >>>
> >> ----
> >> Josh Hursey
> >> jjhursey_at_[hidden]
> >> http://www.lam-mpi.org/
> >>
> >> _______________________________________________
> >> This list is archived at
> >> http://www.lam-mpi.org/MailArchives/lam/
> >>
> >
> >
> >
> >
> > __________________________________
> > Celebrate Yahoo!'s 10th Birthday!
> > Yahoo! Netrospective: 100 Moments of the Web
> > http://birthday.yahoo.com/netrospective/
> > _______________________________________________
> > This list is archived at
> http://www.lam-mpi.org/MailArchives/lam/
> >
> ----
> Josh Hursey
> jjhursey_at_[hidden]
> http://www.lam-mpi.org/
>
> _______________________________________________
> This list is archived at
> http://www.lam-mpi.org/MailArchives/lam/
>
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