[mpich-discuss] Can ch3:nemesis:mx use both MX and TCP networks ?

[Darius Buntinas]

Martin,

How critical is this feature for you?

-d

On 10/13/2009 11:00 AM, Audet, Martin wrote:
> MPI_Users/MPI_Developers,
> 
>  
> 
> I always thought (but never tested) that the ch3:nemesis:mx channel has
> the ability to independently select either MX or TCP to communicate
> between any pair of MPI processes when shared memory communication isn’t
> possible (e.g. the two process run on different nodes).
> 
>  
> 
> However after carefully reading the README file, I fear mpich2 doesn’t
> have this flexibility that is, network communication with the
> ch3:nemesis:mx channel is always done using MX (of course network
> communication occurs when shared memory communication isn’t possible).
> 
>  
> 
> Can someone clarify this ?
> 
>  
> 
> When shared memory communication isn’t possible, does the ch3:nemesis:mx
> channel has the ability to independently select either MX or TCP to
> communicate between two MPI processes ?
> 
>  
> 
> Thanks,
> 
>  
> 
> Martin
>