Hi Marcin,
Thanks for the reply.
1. Which are the files in the
source tree where I can get the details of implementation of queue,graph
and the property map for serial as well as distributed (MPI ) cases.
Is there any document that gives details
of the implementation?
2. How often are the property maps on
various nodes synchronized and under what condition?
3. Is there any synchronisation with
respect to the queues ? Where can I get more details of these?
please help,
regards,
-Mahesh
From:
Marcin Zalewski <marcin.zalewski@gmail.com>
To:
boost-users@lists.boost.org
Date:
07/30/2015 10:03 AM
Subject:
Re: [Boost-users]
Details of boost parallel graph implementation
Sent by:
"Boost-users"
<boost-users-bounces@lists.boost.org>
On Wed, Jul 29, 2015 at 4:26 AM Mayank Bakshi <mayank.bakshi@tcs.com>
wrote:
Hello,
I am working on mpi implementation of boost for breadth first search.
What is the algorithmic detail for BFS in boost.mpi? How the graph is processed
by each rank which we provide in mpirun (load distribution among different
processes)?
The sequential BGL library is overloaded on distributed
graphs:
https://github.com/boostorg/graph/blob/master/include/boost/graph/breadth_first_search.hpp
Look for the mpl::true_ and mpl::bool_ to see where distributed
vs. not-distributed selection is made. graph_parallel provides some additional
overloads of the helper, but it does not define a brand new BFS:
https://github.com/boostorg/graph_parallel/blob/master/include/boost/graph/distributed/breadth_first_search.hpp
The whole magic happens in the queue, graph, and property
maps data structures. The queue distributes work, and it also implements
a global "empty" check, and the property maps allow accessing
remote vertices. So, if you need MPI BFS, one is already there. _______________________________________________
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