Xin,

The collective calls are handled by the collective framework (mca/coll). You 
can export only the function you want (MPI_Bcast in your example) from your 
collective component.

  george.

On Sep 27, 2011, at 05:43 , Xin He wrote:

> Hi all,
> 
> sorry that it takes so long for paper works of TIPC BTL. Hopefully I can get 
> some feedback this week.
> 
> However, I would like to do some work while waiting. For future work, I would 
> like to add TIPC_broadcast
> to support MPI_Bcast. But as I looked into TCP BTL code, I could not find any 
> code doing broadcast. Does
> that mean MPI_Bcast is actually done by sending one by one? In that case, in 
> I want to add actual broadcast
> support, which part should I change, I guess not just adding a BTL but also 
> modify PML as well?
> 
> Thank you in advance!
> 
> /Xin
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