[ofa-general] Multicast Performance

[Dotan Barak]

Marcel Heinz wrote:
> Marcel Heinz wrote:
>   
>> Dotan Barak wrote:
>>     
>>> Do you use the latest released FW for this device?
>>>       
>> The HCAs all use Mallanox' latest released FW version 1.2.0. I'll have a
>> look at the switch later.
>>     
>
> The Switch is Mellanox MT47396 based and uses FW version 1.0.0.  This
> isn't the latest one, but I don't see anything in the release notes of
> the 1.0.5 firmware which is related to our problem.
>   
1) I know that ib_send_bw supports multicast as well, can you please 
check that you can reproduce your problem
on this benchmark too?

2) You should expect that multicast messages will be slower than unicast 
because the HCA/switch treat them in different way
(message duplication need to be done if needed).

Dotan