[mpich-discuss] dllchan and Nemesis MX?

[Pavan Balaji]

Scott,

dllchan doesn't support ch3:nemesis. In fact, our recent effort is in
making different netmods in Nemesis to be runtime selectable (probably
even dynamically loadable, but we haven't decided on that yet). That
way, you can select "mx" and "tcp" within nemesis.

With respect to "shm", shared memory support is always "on" within
Nemesis. You can disable it through an environment or configure option.
This is not exactly the same as a runtime selectable shm-like module,
but should be close enough.

 -- Pavan

On 02/27/2010 06:34 PM, Scott Atchley wrote:
> Hi all,
> 
> Does dllchan support ch3:nemesis:mx?
> 
> Also, the README states:
> 
>> To select a channel other than the default channel, set the environment variable MPICH_CH3CHANNEL to the channel name (i.e., sock, shm, or ssm).
> 
> Does this mean that you cannot use combinations (e.g. sock and shm or mx and shm)? I cannot imagine someone wanting to use MX with sock, but someone might want to try mx with shm to see if there is any performance difference.
> 
> Thanks,
> 
> Scott
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-- 
Pavan Balaji
http://www.mcs.anl.gov/~balaji