On Wed, 2007-01-03 at 17:02 +0200, Michael S. Tsirkin wrote:

quoted

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.