[ofa-general] maximum IB/iWARP max_inline_data size

[Jeff Squyres]

On Jun 21, 2008, at 9:26 AM, Dotan Barak wrote:

>> Our bias in OMPI is to figure such values dynamically at run-time.   
>> With T3/NE020, it seems to be easy.  Note that if you choose a  
>> max_inline_data value too large, ibv_create_qp will simply fail.   
>> So how can we figure out what the max_inline_data value is for  
>> Mellanox adapters at run-time?  (I'd prefer not to repeatedly  
>> trying to create a QP with increasing values of max_inline_data  
>> until it fails).
> Is it  possible to add such a capability to the HCA capabilities  
> structure (the high limit which is supported by the device)?


That would be nice, but it doesn't solve my immediate problem.  :-)

Paul Hargrove told me (off list) that he ended up looping over  
max_inline_data values testing to see if ibv_create_qp() fails with  
EINVAL.  Yuck!

-- 
Jeff Squyres
Cisco Systems