[openib-general] Re: [PATCH] [RFC] - example user mode rdmaping/pongprogram using CMA

[Michael S. Tsirkin]

Quoting r. Sean Hefty <sean.hefty at intel.com>:
> Subject: RE: [openib-general] Re: [PATCH] [RFC] - example user mode rdmaping/pongprogram using CMA
> 
> >Steve, looks like you have at most a single receive work request posted at the
> >receive workqueue at all times.
> >If true, this is *really* not a good idea, performance-wise, even if you
> >actually have at most 1 packet in flight.
> 
> Can you provide some more details on this?

See 9.7.7.2 end-to-end (message level) flow control

-- 
Michael S. Tsirkin
Staff Engineer, Mellanox Technologies