[openib-general] ip over ib throughtput

Michael S. Tsirkin mst at mellanox.co.il
Tue Jan 11 16:37:45 PST 2005


Quoting r. Grant Grundler (iod00d at hp.com) "Re: [openib-general] ip over ib throughtput":
> On Tue, Jan 11, 2005 at 01:41:00PM -0800, Roland Dreier wrote:
> > I think a full MSI update for tg3 would need a separate MSI interrupt
> > routine that takes advantage of all the additional non-shared and
> > ordering guarantees that MSI provides.
> 
> That's the beauty of bcm57xx. The DMA/Intr ordering is handled by passing
> tags back of forth - so the NIC knows which status block the host saw
> on the current interrupt. It might result in a spurious interrupt
> on occasion but very portable IMHO.

Does this mean that after MSI wa asserted, and before status is passed
back, no more messages of the same kind are sent?

mst



More information about the general mailing list