From: josh@joshtriplett.org
To: Christoph Lameter <cl@linux.com>
Cc: Sarah Sharp <sarah@minilop.net>,
ksummit-discuss@lists.linuxfoundation.org,
Greg KH <gregkh@linuxfoundation.org>,
James Bottomley <James.Bottomley@HansenPartnership.com>,
Julia Lawall <julia.lawall@lip6.fr>,
Darren Hart <darren@dvhart.com>,
Dan Carpenter <dan.carpenter@oracle.com>
Subject: Re: [Ksummit-discuss] [CORE TOPIC] Kernel tinification: shrinking the kernel and avoiding size regressions
Date: Fri, 9 May 2014 10:21:33 -0700 [thread overview]
Message-ID: <20140509172133.GD8289@cloud> (raw)
In-Reply-To: <alpine.DEB.2.10.1405091150410.11810@gentwo.org>
On Fri, May 09, 2014 at 11:55:23AM -0500, Christoph Lameter wrote:
> On Fri, 9 May 2014, Steven Rostedt wrote:
> > Size may not be as important as having reuse of code. Perhaps if you
> > can tweak several functions to call one helper function, which may
> > actually increase the total size of the kernel, but having more helper
> > functions that live in cache longer may be of benefit.
>
> More helper functions means more use of l1 cache lines which reduces
> performance.
If done poorly, but on the other hand, factoring a common code path out
of many call sites into one helper function makes it more likely that
helper function will remain cached.
- Josh Triplett
next prev parent reply other threads:[~2014-05-09 17:21 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-08 16:24 [Ksummit-discuss] [CORE TOPIC] Kernel tinification: shrinking the kernel and avoiding size regressions Christoph Lameter
2014-05-09 0:31 ` James Bottomley
2014-05-09 14:48 ` Christoph Lameter
2014-05-09 16:24 ` Steven Rostedt
2014-05-09 16:55 ` Christoph Lameter
2014-05-09 17:21 ` josh [this message]
2014-05-09 17:42 ` James Bottomley
2014-05-09 17:52 ` Christoph Lameter
2014-05-09 18:32 ` Steven Rostedt
2014-05-09 19:02 ` Julia Lawall
2014-05-09 20:31 ` Steven Rostedt
2014-05-09 17:52 ` Matthew Wilcox
2014-05-12 18:06 ` Dave Hansen
2014-05-12 20:20 ` Roland Dreier
2014-05-14 2:37 ` Li Zefan
2014-05-15 19:41 ` H. Peter Anvin
2014-05-15 20:00 ` Greg KH
2014-05-15 20:29 ` Guenter Roeck
-- strict thread matches above, loose matches on Subject: below --
2014-05-02 16:44 Josh Triplett
2014-05-02 17:11 ` Dave Jones
2014-05-02 17:20 ` James Bottomley
2014-05-02 17:33 ` Dave Jones
2014-05-02 17:46 ` Josh Boyer
2014-05-02 18:50 ` H. Peter Anvin
2014-05-02 19:02 ` Josh Boyer
2014-05-02 19:03 ` Michael Kerrisk (man-pages)
2014-05-02 19:33 ` Theodore Ts'o
2014-05-02 19:38 ` Jiri Kosina
2014-05-02 19:49 ` Dave Jones
2014-05-02 20:06 ` Steven Rostedt
2014-05-02 20:41 ` Theodore Ts'o
2014-05-02 21:01 ` Dave Jones
2014-05-02 21:19 ` Josh Boyer
2014-05-02 21:23 ` Jiri Kosina
2014-05-02 21:36 ` Josh Boyer
2014-05-02 21:27 ` James Bottomley
2014-05-02 21:39 ` Josh Boyer
2014-05-02 22:35 ` Andy Lutomirski
2014-05-06 17:18 ` josh
2014-05-06 17:31 ` Andy Lutomirski
2014-05-09 18:22 ` H. Peter Anvin
2014-05-09 20:37 ` Andy Lutomirski
2014-05-09 22:50 ` Josh Triplett
2014-05-10 0:23 ` James Bottomley
2014-05-10 0:38 ` Andy Lutomirski
2014-05-10 3:44 ` Josh Triplett
2014-05-03 17:30 ` James Bottomley
2014-05-02 21:56 ` tytso
2014-05-02 20:45 ` Ben Hutchings
2014-05-02 21:03 ` Dave Jones
2014-05-03 13:37 ` Michael Kerrisk (man-pages)
2014-05-03 13:35 ` Michael Kerrisk (man-pages)
2014-05-03 13:32 ` Michael Kerrisk (man-pages)
2014-05-02 19:03 ` Mark Brown
2014-05-02 19:45 ` Luck, Tony
2014-05-02 21:03 ` Mark Brown
2014-05-02 21:08 ` Dave Jones
2014-05-02 21:14 ` Andy Lutomirski
2014-05-02 21:21 ` Luck, Tony
2014-05-02 21:38 ` H. Peter Anvin
2014-05-03 1:21 ` Mark Brown
2014-05-07 12:35 ` David Woodhouse
2014-05-09 15:51 ` Mark Brown
2014-05-02 17:33 ` Guenter Roeck
2014-05-02 17:44 ` Steven Rostedt
2014-05-07 11:32 ` David Woodhouse
2014-05-07 16:38 ` James Bottomley
2014-05-02 22:04 ` Jan Kara
2014-05-05 23:45 ` Bird, Tim
2014-05-06 2:14 ` H. Peter Anvin
2014-05-09 16:22 ` Josh Triplett
2014-05-09 16:59 ` Bird, Tim
2014-05-09 17:23 ` josh
2014-05-08 15:52 ` Christoph Lameter
2014-05-12 17:35 ` Wolfram Sang
2014-05-13 16:36 ` Bird, Tim
2014-05-13 18:00 ` josh
2014-05-14 1:04 ` Julia Lawall
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20140509172133.GD8289@cloud \
--to=josh@joshtriplett.org \
--cc=James.Bottomley@HansenPartnership.com \
--cc=cl@linux.com \
--cc=dan.carpenter@oracle.com \
--cc=darren@dvhart.com \
--cc=gregkh@linuxfoundation.org \
--cc=julia.lawall@lip6.fr \
--cc=ksummit-discuss@lists.linuxfoundation.org \
--cc=sarah@minilop.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.