[Rcpp-devel] Rcpp-devel Digest, Vol 4, Issue 14

[Jianping Hua]

Hi, Dirk:

Segmentation error is my stupid typo. The memory assignment in line 19
surely should be
    double *allvalues = new double [ nodesize ]; // to save all results
rather than
    double *allvalues = new double ( nodesize ); // to save all results

The new makefile did not work on my MBP still because of the mtune
parameter. Basically I have to use
CXXFLAGS := $(MPILIBS) $(RCPPFLAGS) $(RCPPINCL) $(RINSIDEINCL) -g -O2

Surely you can add these examples to next RInside tarball.

Jianping


On Tue, Feb 16, 2010 at 4:00 AM,
<rcpp-devel-request at lists.r-forge.r-project.org> wrote:

> Message: 1
> Date: Mon, 15 Feb 2010 15:40:26 -0600
> From: Dirk Eddelbuettel <edd at debian.org>
> Subject: Re: [Rcpp-devel] mpi and RInside
> To: Jianping Hua <talich at gmail.com>
> Cc: rcpp-devel at lists.r-forge.r-project.org
> Message-ID: <19321.48970.559109.580495 at ron.nulle.part>
> Content-Type: text/plain; charset=us-ascii
>
>
> Jianping,
>
> Very cool. Thanks for posting this!
>
> [ snip ]
>
> That works. I did the following (using Open MPI on Linux)
>
> a) define new variables
>
>   # OpenMPI header and libraries
>   MPICPPFLAGS :=       $(shell mpic++ -showme:compile)
>   MPILIBS :=           $(shell mpic++ -showme:link)
>
> b) use these variables
>
>   CXXFLAGS :=          $(MPICPPFLAGS) $(RCPPFLAGS) $(RCPPINCL) $(RINSIDEINCL) $(shell $(R_HOME)/bin/R CMD config CXXFLAGS)
>   LDLIBS :=            $(MPILIBS) $(RLDFLAGS) $(RBLAS) $(RLAPACK) $(RCPPLIBS) $(RINSIDELIBS)
>
> [ snip ]
>
> This example seg faults for me on the
>
>     delete[] allvalues;
>
> step.
>
> Maybe w have to make sure that node 0 is the one allocating and doing the
> gathering?
>
> | I hope this information is useful.
>
> Very much so!  This brings RInside right back to the MPI part of my HPC
> exercises :)
>
> Would you permit us to include your example, with the altered Makefile, as
> additional examples in the RInside tarball?
>
> Thanks again for posting this!
>
> Regards, Dirk
>
> --
>  Registration is open for the 2nd International conference R / Finance 2010
>  See http://www.RinFinance.com for details, and see you in Chicago in April!
>
>
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> End of Rcpp-devel Digest, Vol 4, Issue 14
> *****************************************
>