From: Martin Dalecki <dalecki@evision-ventures.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: dalecki@evision.ag, Linus Torvalds <torvalds@transmeta.com>,
linux-kernel@vger.kernel.org
Subject: Re: Using %cr2 to reference "current"
Date: Wed, 07 Nov 2001 16:36:52 +0100 [thread overview]
Message-ID: <3BE95514.8626CB4F@evision-ventures.com> (raw)
In-Reply-To: <E161TWH-0004G9-00@the-village.bc.nu>
Alan Cox wrote:
>
> > somehow encouraged by the compiler comparisions between gcc and intel's
> > free compiler, which use the register passing for anything local
> > to the actual code, where the speed gains are up to 20% im currently
>
> I was under the impression intels compiler was profoundly non-free ?
Well it's free in terms of money, read: download and "personal usage"
blabla.
This doesn't deterr me from having a look at it ;-).
>
> > quite inclined to do the redo and finish the experiment.
> > BTW.> It's not just asm fixpus that have to be done for this
> > to work. For example all the c files with -fno-omit-frame-pointer
>
> 20% is a nice large number.
Yes I was impressed as well and twiddeling with compiler flags is
actually indicating that the calling convention stuff is one
of the main contributors to this. BTW.> The speed differences
can go up to 40% for floating point, OK this is irrelevant for
the kernel but it is showing very well that there is still
plenty of room for improvement.
next prev parent reply other threads:[~2001-11-07 14:44 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-06 7:18 Using %cr2 to reference "current" H. Peter Anvin
2001-11-06 8:01 ` Robert Love
2001-11-06 10:55 ` Alan Cox
2001-11-06 17:31 ` Michael Barabanov
2001-11-06 14:14 ` Manfred Spraul
2001-11-06 10:58 ` Alan Cox
2001-11-06 17:04 ` Linus Torvalds
2001-11-06 17:46 ` Alan Cox
2001-11-06 17:59 ` Linus Torvalds
2001-11-06 18:14 ` Alan Cox
2001-11-06 16:55 ` Marcelo Tosatti
2001-11-06 18:14 ` Linus Torvalds
2001-11-06 18:31 ` Alan Cox
2001-11-06 22:38 ` Linus Torvalds
2001-11-07 0:00 ` Martin Dalecki
2001-11-06 23:19 ` Alan Cox
2001-11-07 0:43 ` Martin Dalecki
2001-11-07 0:27 ` Alan Cox
2001-11-07 0:35 ` Jeff Garzik
2001-11-07 14:00 ` Martin Dalecki
2001-11-07 13:38 ` Alan Cox
2001-11-07 14:59 ` Martin Dalecki
2001-11-07 14:17 ` Alan Cox
2001-11-07 14:34 ` Dirk Moerenhout
2001-11-07 14:54 ` Alan Cox
2001-11-07 15:32 ` David Howells
2001-11-07 14:39 ` Intel compiler [Re: Using %cr2 to reference "current"] Sebastian Heidl
2001-11-07 22:05 ` lists
2001-11-07 15:36 ` Martin Dalecki [this message]
2001-11-08 14:08 ` Using %cr2 to reference "current" Martin Dalecki
2001-11-13 16:49 ` Merge BUG in 2.4.15-pre4 serial.c Martin Dalecki
2001-11-13 16:21 ` Russell King
2001-11-13 17:37 ` Martin Dalecki
2001-11-13 16:53 ` Russell King
2001-11-13 18:05 ` Martin Dalecki
2001-11-13 17:11 ` Alan Cox
2001-11-13 18:23 ` Martin Dalecki
2001-11-07 20:04 ` Using %cr2 to reference "current" Andrew Morton
2001-11-11 13:16 ` Martin Dalecki
2001-11-11 13:06 ` Keith Owens
2001-11-12 11:28 ` PATCH 2.4.14 mregparm=3 compilation fixes Martin Dalecki
2001-11-12 16:10 ` Keith Owens
2001-11-12 16:25 ` Christoph Hellwig
2001-11-12 17:56 ` Martin Dalecki
2001-11-12 16:42 ` Linus Torvalds
2001-11-12 18:51 ` Martin Dalecki
2001-11-12 20:05 ` Corsspatch patch-2.4.15-pre2 patch-2.4.15-pre3 Martin Dalecki
2001-11-12 20:13 ` BUG BUG hunt the bugs!!! patch-2.4.15-pre5 Martin Dalecki
2001-11-06 17:02 ` Using %cr2 to reference "current" Linus Torvalds
2001-11-06 17:13 ` Benjamin LaHaise
2001-11-06 17:49 ` Linus Torvalds
2001-11-06 18:19 ` Alan Cox
2001-11-09 21:52 ` Jamie Lokier
2001-11-06 18:42 ` Benjamin LaHaise
2001-11-06 19:09 ` H. Peter Anvin
2001-11-06 19:16 ` Dave Jones
2001-11-06 20:10 ` Ricky Beam
2001-11-06 23:09 ` Alan Cox
2001-11-06 23:15 ` Dave Jones
-- strict thread matches above, loose matches on Subject: below --
2001-11-06 22:05 Mikael Pettersson
2002-11-10 21:23 Igor Levicki
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=3BE95514.8626CB4F@evision-ventures.com \
--to=dalecki@evision-ventures.com \
--cc=alan@lxorguk.ukuu.org.uk \
--cc=dalecki@evision.ag \
--cc=linux-kernel@vger.kernel.org \
--cc=torvalds@transmeta.com \
/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.