[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
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