[mpich-discuss] [mpich2-maint] #428: MPI_Win_fence memoryconsumption

[Jayesh Krishna]

 Hi,
  A contiguous MPI derived type consisting of 3 MPI_DOUBLEs is not
equivalent to a C structure with 3 doubles. Try using an array of 3
doubles (double[3]) or using an equivalent MPI datatype (eg:
MPI_Type_create_struct()).
  Let us know if it works for you.

Regards,
Jayesh

-----Original Message-----
From: mpich-discuss-bounces at mcs.anl.gov
[mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of Rajeev Thakur
Sent: Friday, February 27, 2009 9:07 PM
To: mpich-discuss at mcs.anl.gov
Subject: Re: [mpich-discuss] MPI_Win_fence memory consumption

OK, thanks. We will look into it.

Rajeev 

> -----Original Message-----
> From: mpich-discuss-bounces at mcs.anl.gov 
> [mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of Dorian Krause
> Sent: Friday, February 27, 2009 7:44 PM
> To: mpich-discuss at mcs.anl.gov
> Subject: Re: [mpich-discuss] MPI_Win_fence memory consumption
> 
> Rajeev Thakur wrote:
> > Does that happen only with Nemesis or even with ch3:sock?
> >   
> 
> The behaviour is the same with the configure flag 
> --with-device=ch3:sock.
> 
> Dorian
> 
> > Rajeev
> >
> >   
> >> -----Original Message-----
> >> From: mpich-discuss-bounces at mcs.anl.gov 
> >> [mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of
> Dorian Krause
> >> Sent: Friday, February 27, 2009 7:16 AM
> >> To: mpich-discuss at mcs.anl.gov
> >> Subject: [mpich-discuss] MPI_Win_fence memory consumption
> >>
> >> Hi List,
> >>
> >> the attached test program uses
> MPI_Accumulate/MPI_Win_fence for one
> >> sided communication with derived datatype.
> >> The program runs fine with mpich2-1.1a2 except for my debugging 
> >> version of MPICH2 compiled with
> >>
> >> ./configure --with-device=ch3:nemesis --enable-g=dbg,mem,meminit
> >>
> >> In this case the MPI_Win_fence on the target side comuses
> about 90%
> >> of main memory (e.g. > 3 GB). As the behaviour is completely 
> >> different for predefined datatypes, I suspect that the memory 
> >> consumption is related to the construction of the derived
> datatype on
> >> the target side.
> >>
> >> Is there a workaround for this?
> >>
> >> Thanks + Best regards,
> >> Dorian
> >>
> >>
> >>
> >>
> >>
> >>     
> 
> 

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