Re: [PATCH] zerocopy NFS for 2.5.36

From: Andrew Theurer (
Date: Wed Oct 16 2002 - 10:04:27 EST

On Tuesday 15 October 2002 11:31 pm, David S. Miller wrote:
> From: Neil Brown <>
> Date: Wed, 16 Oct 2002 13:44:04 +1000
> Presumably on a sufficiently large SMP machine that this became an
> issue, there would be multiple NICs. Maybe it would make sense to
> have one udp socket for each NIC. Would that make sense? or work?
> It feels to me to be cleaner than one for each CPU.
> Doesn't make much sense.
> Usually we are talking via one IP address, and thus over
> one device. It could be using multiple NICs via BONDING,
> but that would be transparent to anything at the socket
> level.
> Really, I think there is real value to making the socket
> per-cpu even on a 2 or 4 way system.

I am trying my best today to get a 4 way system up and running for this test.
IMO, per cpu is best.. with just one socket, I seriously could not get over
33% cpu utilization on a 4 way (back in April). With TCP, I could max it
out. I'll update later today hopefully with some promising results.

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