linux-kernel - Re: Unix sockets via TCP on localhost: is TCP slower?

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Message-Id: <20081113.162233.39564490.davem@davemloft.net>
Date:	Thu, 13 Nov 2008 16:22:33 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	jrm8005@...il.com
Cc:	olafvdspek@...il.com, linux-kernel@...r.kernel.org
Subject: Re: Unix sockets via TCP on localhost: is TCP slower?

From: "J.R. Mauro" <jrm8005@...il.com>
Date: Thu, 13 Nov 2008 19:19:36 -0500

> On Wed, Nov 12, 2008 at 6:20 PM, Olaf van der Spek <olafvdspek@...il.com> wrote:
> > Hi,
> >
> > Quite often in discussions, I see people claiming Unix sockets are
> > faster then TCP sockets on a connection that stays inside localhost.
> 
> Unix domain sockets should be faster because they're not subject to
> windowing, ACKs, flow control, encapsulation, etc. etc.

And the wakeup rate is higher for TCP, and our process scheduler has
been getting gradually slower and slower over time since 2.6.22
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