Re: [Boost-users] mpi: sending/receiving different types

Subject: Re: [Boost-users] mpi: sending/receiving different types
From: Hicham Mouline (hicham_at_[hidden])
Date: 2010-12-05 07:44:36

> -----Original Message-----
> From: boost-users-bounces_at_[hidden] [mailto:boost-users-
> bounces_at_[hidden]] On Behalf Of Brian Budge
> Sent: 03 December 2010 16:34
> To: boost-users_at_[hidden]
> Subject: Re: [Boost-users] mpi: sending/receiving different types
> 
> On Thu, Dec 2, 2010 at 11:49 PM, Hicham Mouline <hicham_at_[hidden]>
> wrote:
> > Hi,
> >
> > I will be sending  messages of different kinds.
> >
> > The destination will not know what kind of message it is trying to
> receive.
> >
> > Imagine I send many messages of the same kind. I understand the tag
> in
> > send/receive will be different in each case? Or can I send 2 messages
> of the
> > same king with the same tag? That way the receiver can use the tag to
> > identify what it is it is receiving. If so, is the receiver supposed
> to use
> > the recv() function with different template argument T until the call
> > succeeds ?
> >
> > Or should I always use packed_<oi>archive?
> >
> >
> >
> > rds,
> Hi Hicham -
> 
> You should look into probe().  I the result of a probe will give you a
> valid MPI_Status, which contains the tag and source.  You can use this
> tag to determine how you can construct an appropriate recv().
> 
>   Brian
>

If from the root process I both mpi::broadcast() and mpi::send(), will a
receiver process be able to use probe() to see if a message that was either
sent or broadcast is available?

How can I do that?

rds,