Re: Van Jacobson's net channels and real-time

From: Auke Kok
Date: Mon Apr 24 2006 - 12:49:05 EST


Ingo Oeser wrote:
On Saturday, 22. April 2006 15:49, Jörn Engel wrote:
That was another main point, yes. And the endpoints should be as
little burden on the bottlenecks as possible. One bottleneck is the
receive interrupt, which shouldn't wait for cachelines from other cpus
too much.

Thats right. This will be made a non issue with early demuxing
on the NIC and MSI (or was it MSI-X?) which will select
the right CPU based on hardware channels.

MSI-X. with MSI you still have only one cpu handling all MSI interrupts and that doesn't look any different than ordinary interrupts. MSI-X will allow much better interrupt handling across several cpu's.

Auke
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