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
>> 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/
>>
>
>
>
>
> __________________________________
> 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/
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