Re: [Boost-users] Boost graph parallel issue

Subject: Re: [Boost-users] Boost graph parallel issue
From: Marcin Zalewski (marcin.zalewski_at_[hidden])
Date: 2015-07-16 05:55:18

Mayank,

Which graph do you use as input? Are you using
https://github.com/boostorg/graph/blob/master/test/weighted_graph.gr ? This
graph is probably just too small to benefit from additional processes.
Could you try some input that runs for at least few seconds on a single
process?

-m

On Tue, Jul 14, 2015 at 9:36 AM Mayank Bakshi <mayank.bakshi_at_[hidden]> wrote:

> I want to utilize boost MPI to increase performance of graph code. When I
> run standard examples in libs/graph_parallel/examples/, bfs does not give
> better performance with more than 1 process taken in mpirun (using
> openmpi 1.8.3). The timing is as follows:
>
> No of Processes          Time (ms)
>
> 1                                  40.80
> 2                                  82.19
> 4                                  92.67
> 8                                  76.86
> 16                                91.61
>
> Any suggestions to improve the performance with processes as graph
> parallel should use more ranks for better performance.
>
>
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>
> Thanks & Regards
> Mayank Bakshi
> Tata Consultancy Services Limited
> Cell:- 7083955990
> Mailto: mayank.bakshi_at_[hidden]
> Website: http://www.tcs.com
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