[ofa-general] How many processes on a node can open IB device ?

[Tziporet Koren]

Tang, Changqing wrote:
> Roland:
>         Thank you very much for the info.
>
>         I hope Mellanox can tell me what to do next, Our project needs to run 2048 ranks
> on a node, every rank has IB communication(most of them are sleeping, only a few are active).
>
>   
I think you already got the answer. Please reply if this is still open
> Roland Dreier wrote:
>   
>> You should be able to build firmware that supports more
>> processes, but I believe there may be some
>> performance/stability tradeoffs related to that -- Mellanox
>> could tell you more.
>>
>>     
There is no performance tradeoffs.
The only problem we once saw with larger UAR page is that on some x86 
systems the BIOS had a problem with it.

Tziporet