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Blitz Support : |
From: Virgilio, Vincent (Vincent.Virgilio_at_[hidden])
Date: 2004-08-16 09:46:23
> -----Original Message-----
> From: blitz-support-bounces_at_[hidden]
> [mailto:blitz-support-bounces_at_[hidden]] On Behalf Of
> Olivier Saut
> Sent: Saturday, August 14, 2004 6:03 AM
> To: Support list for Blitz++
> Subject: [Blitz-support] Blitz++ and MPI broadcasting
>
>
> Hi all,
>
> I am trying to run a computation across several workstations
> using MPI.
> I use the method MPI_Allgatherv to broadcast an
> Array<double,2> to the
> processors.
> This method takes a double* pointing to the data to share between the
> processors.
>
> Is there a way to obtain a pointer to the double in
> Array<double,2> to
> avoid copying the data in a malloc'ed double* before calling
> MPI_Allgatherv.
>
> Thanks a lot,
>
>
> - Olivier
> _______________________________________________
> Blitz-support mailing list
> Blitz-support_at_[hidden]
> http://www.oonumerics.org/mailman/listinfo.cgi/blitz-support
>
Hi Olivier,
There is Array<double, 2>.data(), which should return double*. I
frequently use this to cast around Blitz++ data in MPI buffers, sans
copy.
Vince Virgilio
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