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Re: zerocopy results on GigE

To: "David S. Miller" <davem@xxxxxxxxxx>
Subject: Re: zerocopy results on GigE
From: "Andrew Morton" <morton@xxxxxxxxxxxxxxxxxx>
Date: Wed, 07 Feb 2001 00:23:05 +0000
Cc: Pekka Pietikainen <pp@xxxxxxxxxxxxxx>, netdev@xxxxxxxxxxx
Organization: Nortel Networks, Wollongong Australia
References: <20010206194919.A633@netppl.fi> <14976.28256.593782.781889@pizda.ninka.net>
Sender: owner-netdev@xxxxxxxxxxx
"David S. Miller" wrote:
> 
> Strange, cpu usage is close to nothing for sendfile cases yet full
> bandwidth is not obtained.

Is it possible that the receiver is going into discard,
and TCP is backing off?

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