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From: "J.R. Mauro" <jrm8005@gmail.com>
To: "David Miller" <davem@davemloft.net>
Cc: olafvdspek@gmail.com, linux-kernel@vger.kernel.org
Subject: Re: Unix sockets via TCP on localhost: is TCP slower?
Date: Thu, 13 Nov 2008 19:27:22 -0500	[thread overview]
Message-ID: <3aaafc130811131627l52fcb3a0jba5cc566844fc89e@mail.gmail.com> (raw)
In-Reply-To: <20081113.162233.39564490.davem@davemloft.net>

On Thu, Nov 13, 2008 at 7:22 PM, David Miller <davem@davemloft.net> wrote:
> From: "J.R. Mauro" <jrm8005@gmail.com>
> Date: Thu, 13 Nov 2008 19:19:36 -0500
>
>> On Wed, Nov 12, 2008 at 6:20 PM, Olaf van der Spek <olafvdspek@gmail.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
>

I'm not sure about this, but I now also remember reading somewhere
that TCP has an extra context switch, but I don't know if what I read
was about Linux or a totally different OS.

  reply	other threads:[~2008-11-14  0:27 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-11-12 23:20 Olaf van der Spek
2008-11-13 11:24 ` Arnaldo Carvalho de Melo
2008-11-13 19:06   ` Olaf van der Spek
2008-11-13 23:04     ` Chris Friesen
2008-11-14  0:19 ` J.R. Mauro
2008-11-14  0:22   ` David Miller
2008-11-14  0:27     ` J.R. Mauro [this message]
2008-11-14  8:51   ` Olaf van der Spek
2008-11-14  8:54     ` Eric Dumazet
2008-11-14  9:06       ` Olaf van der Spek
2008-11-14 13:14         ` J.R. Mauro
2008-11-14  8:56     ` David Miller
2008-11-14  9:09       ` Olaf van der Spek
2008-11-14 10:37         ` Bernd Petrovitsch
2008-11-14 13:17         ` J.R. Mauro
2008-11-14 21:07         ` Willy Tarreau
2008-11-14 22:40           ` Olaf van der Spek

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