[ewg] Re: OFED 1.3 RC2 - multicast support to perftest package

[Tziporet Koren]

Or Gerlitz wrote:
> Tziporet Koren wrote:
>> Release information: Specific module changes:
>> Utilities:
>> Performance tests: *    Added multicast support to ib_send_bw and 
>> ib_send_lat tests
>
> Tziporet,
>
> Looking on the commit, it seems that the perftest tools were 
> instrumented to send/receive multicast on a hard coded MGID/MLID, ie 
> no join/leave etc.
>
> Basically, I am not against enabling such approach, however the MLID 
> chosen was 0xc000 which on many clusters assigned by the SM to the 
> IPoIB IPv4 broadcast group of the default partition... so users 
> playing with ib_send -g can storm all nodes on the cluster with 
> messages etc... support wise it does not seem very good idea to do it 
> this way.
>
>
Oren Meron is the maintainer of these tests now - so I send it to him 
for respond

Tziporet