[mpich-discuss] MPI_IN_PLACE argument

Wed Apr 28 09:17:14 CDT 2010

If sendbuf and B are distinct arrays, you don't need to use
MPI_IN_PLACE. The problem is something else then.

Rajeev 

> -----Original Message-----
> From: mpich-discuss-bounces at mcs.anl.gov 
> [mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of 
> Steenhauer, Kate
> Sent: Wednesday, April 28, 2010 5:10 AM
> To: mpich-discuss at mcs.anl.gov; 'Anthony Chan'
> Subject: [mpich-discuss] MPI_IN_PLACE argument
> 
> Hi,
> 
> I am trying to sort the bug in the mpi program (see 
> attached). It seems to me, with my very limited knowledge, 
> that everything is related and the whole program needs to be 
> restructed when upgrading from mpich1 to mpich2? If the 
> MPI_Scatter routine flags a bug (The error message is 'memcpy 
> argument memory ranges overlap, dst_=0xafd74f8 src_=0xafd750c 
> len_=16200, internal ABORT'), then it is, as far as I can 
> see, most likely that the other routines, such as, gather(A, 
> B), allGather(A, B), scatterXY(A, B, nk),gatherXY(A, B, 
> nk),allGatherXY(A, B, nk) etc. (see attached), will bring up 
> a similar bug as well. So I don't really know where to start, 
> considering this is a well-established code, run for many 
> years successfully with mpich1 with sensible output.
> 
> By using the MPI_IN_Place argument I have to replace the 
> recvbuf, B(nx_1,ny_1,nz_1)?
>     call MPI_scatter (sendbuf, nxyz_1, MPI_REAL8, &
>                       B, nxyz_1, MPI_REAL8, &
>                       idroot, icomm_grid, ierr) I hope you 
> will be able to help me.
> kate
> 
> -----Original Message-----
> From: mpich-discuss-bounces at mcs.anl.gov 
> [mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of Rajeev Thakur
> Sent: 27 April 2010 17:32
> To: mpich-discuss at mcs.anl.gov; 'Anthony Chan'
> Subject: Re: [mpich-discuss] configuration problem
> 
> Kate,
>      You have to use the mpif.h file that comes with the MPI 
> implementation, not from some other MPI implementation. With 
> MPICH2, you have to use MPICH2's include file.
> 
> The error with MPI_Scatter indicates there is a bug in your 
> MPI program.
> You are using the same buffer as sendbuf and recvbuf, which 
> is not allowed in MPI. You can use the MPI_IN_PLACE argument 
> instead, as described in the MPI standard.
> 
> I would recommend using MPICH2 instead of trying to get 
> MPICH-1 to work.
> 
> Rajeev
> 
> 
> > -----Original Message-----
> > From: mpich-discuss-bounces at mcs.anl.gov 
> > [mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of Steenhauer, 
> > Kate
> > Sent: Tuesday, April 27, 2010 9:50 AM
> > To: Anthony Chan; mpich-discuss at mcs.anl.gov
> > Subject: Re: [mpich-discuss] configuration problem
> >
> > Initially, I tried to run my code with mpich2. The 
> following happens.
> >
> > We have 1 workstation with 8 processors, the following
> > software: Linux Centos, Fortran Intel 11.1.
> >
> > Mpich2, Intel Fortran and Linux is not working on our pc. 
> It does not 
> > like the mpif.inc file, it immediately gets into problems at the 
> > initialisation of the MPI (subroutine MPI_INI).
> > mpirun -np 8 RUN02
> > > Fatal error in MPI_Comm_size: Invalid communicator, error stack:
> > > MPI_Comm_size(111): MPI_Comm_size(comm=0x5b, size=0x7fffce629784) 
> > > failed
> > > MPI_Comm_size(69).: Invalid communicator MPISTART
> > > rank 7 in job 2  cops-021026_40378   caused collective
> > abort of all ranks
> > >  exit status of rank 7: killed by signal 9
> >
> > Then when I change the mpif.inc file (see attachment) and 
> direct it to 
> > the mpif.h file that came with the mpich2 library, it gets 
> passed this 
> > problem but then runs into a next problem further down the line at 
> > MPI_SCATTER, where it is trying to distribute data to the different 
> > processors. The error message is 'memcpy argument memory ranges 
> > overlap,
> > dst_=0xafd74f8 src_=0xafd750c len_=16200, internal ABORT'.
> >
> > There is something in the parametresiation within the mpi that is 
> > possibly different then when the code is successfully run 
> on another 
> > cluster (this cluster uses Redhat, various mpich versions, e.g. 
> > mpich-1.2.5..12, and various versions of Intel FORTRAN compiler 
> > (ifort), e.g. 7, 9 and 12).
> >
> > I have attached the mpif.inc file.
> >
> > Please let me know if you have any ideas?
> >
> > Thanks
> >
> > Kate
> >
> > -----Original Message-----
> > From: mpich-discuss-bounces at mcs.anl.gov 
> > [mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of 
> > chan at mcs.anl.gov
> > Sent: 27 April 2010 15:42
> > To: mpich-discuss at mcs.anl.gov
> > Subject: Re: [mpich-discuss] configuration problem
> >
> >
> > Is there any reason you can't use mpich2 ?  The latest 
> stable release 
> > of mpich2 is 1.2.1p1.
> >
> > mpich-1 is no longer officially supported.  Latest fortran 
> compilers 
> > are much better supported in mpich2.
> >
> > A.Chan
> >
> > ----- "Kate Steenhauer" <k.steenhauer at abdn.ac.uk> wrote:
> >
> > > Hello,
> > >
> > > We are trying to install mpich-1.2.7p1. I downloaded and
> > unzipped this
> > > version from http://www.mcs.anl.gov/research/projects/mpi/mpich1/
> > >
> > > We have 1 workstation with 8 processors, and the 
> following software:
> > > Linux Centos and Fortran Intel 11.1.
> > >
> > > When the documentation guidelines with regard to configuring and 
> > > making are followed (see the files attached) it all seems ok, e.g.
> > > mpif90 is generated. However, when a simple parallel job is
> > tested we
> > > get the following error:
> > >
> > > mpif90 -o testA MPITEST.f90
> > > No Fortran 90 compiler specified when mpif90 was created, or 
> > > configuration file does not specify a compiler.
> > >
> > > Is there a specific prefix I need to give with an ifort fortran 
> > > compiler when I configure mpich?
> > >
> > > I would like to thank you in advance for your help. Please
> > let me know
> > > if you need any further details.
> > >
> > > Regards
> > >
> > > Kate Steenhauer
> > >
> > > University of Aberdeen
> > >
> > > 01224-272806
> > >
> > >
> > >
> > >
> > >
> > > The University of Aberdeen is a charity registered in 
> Scotland, No 
> > > SC013683.
> > >
> > > _______________________________________________
> > > mpich-discuss mailing list
> > > mpich-discuss at mcs.anl.gov
> > > https://lists.mcs.anl.gov/mailman/listinfo/mpich-discuss
> > _______________________________________________
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> > mpich-discuss at mcs.anl.gov
> > https://lists.mcs.anl.gov/mailman/listinfo/mpich-discuss
> >
> >
> > The University of Aberdeen is a charity registered in Scotland, No 
> > SC013683.
> >
> 
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> 
> The University of Aberdeen is a charity registered in 
> Scotland, No SC013683.
> 