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From: Ken Moffat <ken@kenmoffat.uklinux.net>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Lee Revell <rlrevell@joe-job.com>,
	Denis Vlasenko <vda@port.imtp.ilyichevsk.odessa.ua>,
	Tim Hockin <thockin@hockin.org>,
	Linus Torvalds <torvalds@osdl.org>, Andi Kleen <ak@suse.de>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [OT] Re: code bloat [was Re: Semaphore assembly-code bug]
Date: Sun, 31 Oct 2004 01:09:54 +0000 (GMT)	[thread overview]
Message-ID: <Pine.LNX.4.58.0410310155080.11293@ppg_penguin.kenmoffat.uklinux.net> (raw)
In-Reply-To: <1099176751.25194.12.camel@localhost.localdomain>

On Sat, 30 Oct 2004, Alan Cox wrote:

> On Sul, 2004-10-31 at 00:20, Lee Revell wrote:
> > I think very few application developers understand the point Linus made
> > - that bigger code IS slower code due to cache misses.  If this were
> > widely understood we would be in pretty good shape.
>
> On my laptop both Openoffice and gnome are measurably faster if you
> build the lot with -Os (except a couple of image libs)
>

Depends how much of gnome you use.  I used to swear by -Os for
non-toolchain stuff, but in the end I got bitten by gnumeric on x86.
http://bugs.gnome.org/show_bug.cgi?id=128834 is similar, but in my case
opening *any* spreadsheet would cause gnumeric to segfault (gcc-3.3
series).  Add in the time spent rebuilding gnome before I found this bug
report, and adding extra parts of gnome just in case I missed something,
and the time to load it is irrelevant.  Since then I've had an anecdotal
report that -Os is known to cause problems with gnome.  I s'pose people
will say it serves me right for doing my initial testing on ppc which
didn't have this problem ;)  The point is that -Os is *much* less tested
than -O2 at the moment.

Ken
-- 
 das eine Mal als Tragödie, das andere Mal als Farce


  reply	other threads:[~2004-10-31  1:09 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <Pine.LNX.4.58.0410181540080.2287@ppc970.osdl.org.suse.lists.linux.kernel>
     [not found] ` <417550FB.8020404@drdos.com.suse.lists.linux.kernel>
     [not found]   ` <1098218286.8675.82.camel@mentorng.gurulabs.com.suse.lists.linux.kernel>
     [not found]     ` <41757478.4090402@drdos.com.suse.lists.linux.kernel>
     [not found]       ` <20041020034524.GD10638@michonline.com.suse.lists.linux.kernel>
     [not found]         ` <1098245904.23628.84.camel@krustophenia.net.suse.lists.linux.kernel>
     [not found]           ` <1098247307.23628.91.camel@krustophenia.net.suse.lists.linux.kernel>
     [not found]             ` <Pine.LNX.4.61.0410200744310.10521@chaos.analogic.com.suse.lists.linux.kernel>
     [not found]               ` <Pine.LNX.4.61.0410290805570.11823@chaos.analogic.com.suse.lists.linux.kernel>
     [not found]                 ` <Pine.LNX.4.58.0410290740120.28839@ppc970.osdl.org.suse.lists.linux.kernel>
     [not found]                   ` <41826A7E.6020801@domdv.de.suse.lists.linux.kernel>
     [not found]                     ` <Pine.LNX.4.61.0410291255400.17270@chaos.analogic.com.suse.lists.linux.kernel>
     [not found]                       ` <Pine.LNX.4.58.0410291103000.28839@ppc970.osdl.org.suse.lists.linux.kernel>
     [not found]                         ` <Pine.LNX.4.61.0410291631250.8616@twinlark.arctic.org.suse.lists.linux.kernel>
2004-10-30  2:04                           ` Semaphore assembly-code bug Andi Kleen
     [not found]                   ` <Pine.LNX.4.61.0410291316470.3945@chaos.analogic.com.suse.lists.linux.kernel>
     [not found]                     ` <20041029175527.GB25764@redhat.com.suse.lists.linux.kernel>
     [not found]                       ` <Pine.LNX.4.61.0410291416040.4844@chaos.analogic.com.suse.lists.linux.kernel>
     [not found]                         ` <Pine.LNX.4.58.0410291133220.28839@ppc970.osdl.org.suse.lists.linux.kernel>
2004-10-30  2:13                           ` Andi Kleen
2004-10-30  9:28                             ` Denis Vlasenko
2004-10-30 17:53                               ` Linus Torvalds
2004-10-30 21:00                                 ` Denis Vlasenko
2004-10-30 21:14                                   ` code bloat [was Re: Semaphore assembly-code bug] Lee Revell
2004-10-30 22:11                                     ` Denis Vlasenko
2004-10-30 22:25                                       ` Lee Revell
2004-10-31 14:06                                         ` Diego Calleja
2004-10-31 20:53                                           ` Z Smith
2004-10-31 23:35                                             ` Rogério Brito
2004-11-01  1:20                                               ` Z Smith
2004-11-01 14:48                                             ` Diego Calleja
2004-11-01 15:09                                               ` [OT] " Russell Miller
2004-10-30 22:27                                       ` Tim Hockin
2004-10-30 22:44                                         ` Jeff Garzik
2004-10-30 22:50                                           ` Tim Hockin
2004-10-31 20:15                                           ` Theodore Ts'o
2004-10-31 20:21                                             ` Jeff Garzik
2004-10-31 21:06                                             ` Jan Engelhardt
2004-11-01 11:27                                             ` Alan Cox
2004-11-01 13:40                                               ` Denis Vlasenko
2004-11-01 23:04                                                 ` Alan Cox
2004-10-30 23:13                                         ` Denis Vlasenko
2004-10-30 22:45                                           ` Alan Cox
2004-10-31  1:21                                             ` Z Smith
2004-10-31  2:47                                               ` Jim Nelson
2004-10-31 15:19                                               ` Alan Cox
2004-10-31 20:18                                                 ` Z Smith
2004-11-01 11:05                                                   ` Alan Cox
2004-10-30 23:20                                           ` [OT] " Lee Revell
2004-10-30 22:52                                             ` Alan Cox
2004-10-31  1:09                                               ` Ken Moffat [this message]
2004-10-31  2:42                                                 ` Tim Connors
2004-10-31  4:45                                                   ` Paul
2004-10-31 14:44                                                 ` Alan Cox
2004-10-31  0:48                                             ` Andi Kleen
2004-10-30 23:28                                           ` Tim Hockin
2004-10-31  2:04                                             ` Michael Clark
2004-10-31  6:49                                         ` Jan Engelhardt
2004-10-31 21:09                                           ` Z Smith
2004-10-31 21:13                                             ` Jan Engelhardt
2004-10-31 21:48                                               ` Z Smith
2004-11-01 11:29                                               ` Alan Cox
2004-11-01 12:36                                                 ` Jan Engelhardt
2004-11-01 15:17                                           ` Lee Revell
2004-11-01 16:56                                             ` Kristian Høgsberg
2004-10-31  6:37                                     ` Jan Engelhardt
2004-10-31  0:39                                 ` Semaphore assembly-code bug Andi Kleen
2004-10-31  1:43                                   ` Linus Torvalds
2004-10-31  2:04                                     ` Andi Kleen

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