netdev - Re: [PATCH] fix limited slow start bug

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Message-ID: <39e6f6c70702251819x2698c56et6e996898271a4342@mail.gmail.com>
Date:	Sun, 25 Feb 2007 23:19:51 -0300
From:	"Arnaldo Carvalho de Melo" <arnaldo.melo@...il.com>
To:	"David Miller" <davem@...emloft.net>
Cc:	simrw@...-basis.de, netdev@...r.kernel.org
Subject: Re: [PATCH] fix limited slow start bug

On 2/25/07, David Miller <davem@...emloft.net> wrote:
> From: Roger While <simrw@...-basis.de>
> Date: Sun, 25 Feb 2007 09:55:34 +0100
>
> > Was anything done about size/member alignment of struct tcp_sock per
> > mail from last year  -
> > http://marc.theaimsgroup.com/?l=linux-netdev&m=114318857102290&w=2
> >
> > (I have no idea what current size is)
>
> Nothing has been done yet but I've been thinking about it a lot
> over the past year and I've had some discussions with other
> developers such as Arnaldo.
>
> It's just a matter of me being backlogged, so I never get to
> it as often as I would like :)

Attached goes a current (DaveM's net-2.6 git tree build) pahole
picture of tcp_sock on UP, 32bits, summary:

}; /* size: 1288, cachelines: 21 */
   /* last cacheline: 8 bytes */

and for the really curious, take a look at:

http://oops.ghostprotocols.net:81/acme/dwarves/tcp_sock.pahole.expand_types.txt

All the types are expanded, makes a pretty big picture :-)

- Arnaldo

View attachment "tcp_sock.pahole.txt" of type "text/plain" (6870 bytes)