[openib-general] [PATCH v4 01/13] Linux RDMA Core Changes

[Michael S. Tsirkin]

> > > I've run this code with mthca and didn't notice any performance
> > > degradation, but I wasn't specifically measuring cq_poll overhead in a
> > > tight loop...
> > 
> > We were speaking about ib_req_notify_cq here, actually, not cq poll.
> > So what was tested?
> > 
> 
> Sorry, I meant req_notify.  I didn't specifically measure the cost of
> req_notify before and after this change.
> 
> I've been running the user mode perftest programs mainly.  

So, it's not really activated a lot there.
You want something like IPoIB BW test.

-- 
MST