From: Nicolas Pitre <nico@fluxnic.net>
To: Peter Korsgaard <jacmet@sunsite.dk>
Cc: "Markus F.X.J. Oberhumer" <markus@oberhumer.com>,
Kyungsik Lee <kyungsik.lee@lge.com>,
Andrew Morton <akpm@linux-foundation.org>,
Russell King <linux@arm.linux.org.uk>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
Michal Marek <mmarek@suse.cz>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-kbuild@vger.kernel.org,
x86@kernel.org, celinux-dev@lists.celinuxforum.org,
Nitin Gupta <nitingupta910@gmail.com>,
Richard Purdie <rpurdie@openedhand.com>,
Josh Triplett <josh@joshtriplett.org>,
Joe Millenbach <jmillenbach@gmail.com>,
David Sterba <dsterba@suse.cz>,
Richard Cochran <richardcochran@gmail.com>,
Albin Tonnerre <albin.tonnerre@free-electrons.com>,
Egon Alter <egon.alter@gmx.net>,
hyojun.im@lge.com, chan.jeong@lge.com,
raphael.andy.lee@gmail.com
Subject: Re: [RFC PATCH v2 0/4] Add support for LZ4-compressed kernel
Date: Tue, 26 Feb 2013 17:09:51 -0500 (EST) [thread overview]
Message-ID: <alpine.LFD.2.03.1302261708120.1254@syhkavp.arg> (raw)
In-Reply-To: <87fw0i7n6d.fsf@dell.be.48ers.dk>
On Tue, 26 Feb 2013, Peter Korsgaard wrote:
> >>>>> "Nicolas" == Nicolas Pitre <nico@fluxnic.net> writes:
>
> Hi,
>
> >> Did you actually *try* the new LZO version and the patch (which is attached
> >> once again) as explained in https://lkml.org/lkml/2013/2/3/367 ?
> >>
> >> Because the new LZO version is faster than LZ4 in my testing, at least
> >> when comparing apples with apples and enabling unaligned access in
> >> BOTH versions:
> >>
> >> armv7 (Cortex-A9), Linaro gcc-4.6 -O3, Silesia test corpus, 256 kB block-size:
> >>
> >> compression speed decompression speed
> >>
> >> LZO-2012 : 44 MB/sec 117 MB/sec no unaligned access
> >> LZO-2013-UA : 47 MB/sec 167 MB/sec Unaligned Access
> >> LZ4 r88 UA : 46 MB/sec 154 MB/sec Unaligned Access
>
> Nicolas> To be fair, you should also take into account the compressed
> Nicolas> size of a typical ARM kernel. Sometimes a slightly slower
> Nicolas> decompressor may be faster overall if the compressed image to
> Nicolas> work on is smaller.
>
> Yes, but notice that lzo compressed BETTER than lz4 - E.G. from the
> introduction mail:
>
> 1. ARMv7, 1.5GHz based board
> Kernel: linux 3.4
> Uncompressed Kernel Size: 14MB
> Compressed Size Decompression Speed
> LZO 6.7MB 21.1MB/s
> LZ4 7.3MB 29.1MB/s, 45.6MB/s(UA)
OK. If LZO is now faster than LZ4 while still compressing more then I
have no argument.
Nicolas
next prev parent reply other threads:[~2013-02-26 22:09 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-26 6:24 [RFC PATCH v2 0/4] Add support for LZ4-compressed kernel Kyungsik Lee
2013-02-26 6:24 ` [RFC PATCH v2 1/4] decompressor: Add LZ4 decompressor module Kyungsik Lee
2013-02-26 13:12 ` David Sterba
2013-02-27 4:38 ` Kyungsik Lee
2013-02-26 6:24 ` [RFC PATCH v2 2/4] lib: Add support for LZ4-compressed kernel Kyungsik Lee
2013-02-26 14:00 ` David Sterba
2013-02-28 5:22 ` Kyungsik Lee
2013-02-26 6:24 ` [RFC PATCH v2 3/4] arm: " Kyungsik Lee
2013-02-26 6:24 ` [RFC PATCH v2 4/4] x86: " Kyungsik Lee
2013-02-26 20:33 ` [RFC PATCH v2 0/4] " Markus F.X.J. Oberhumer
2013-02-26 20:59 ` Nicolas Pitre
2013-02-26 21:58 ` Peter Korsgaard
2013-02-26 22:09 ` Nicolas Pitre [this message]
2013-02-26 22:10 ` Russell King - ARM Linux
2013-02-27 1:40 ` Joe Perches
2013-02-27 9:56 ` Russell King - ARM Linux
2013-02-27 15:49 ` Joe Perches
2013-02-27 16:08 ` Nicolas Pitre
2013-02-27 16:31 ` Russell King - ARM Linux
2013-02-27 16:53 ` Borislav Petkov
2013-02-27 17:04 ` Joe Perches
2013-02-27 17:16 ` Nicolas Pitre
2013-02-27 17:39 ` Joe Perches
2013-02-27 17:52 ` Nicolas Pitre
2013-02-27 17:57 ` Russell King - ARM Linux
2013-02-27 17:36 ` Russell King - ARM Linux
2013-02-28 4:22 ` Joe Perches
2013-02-27 7:36 ` Kyungsik Lee
2013-02-27 9:51 ` Russell King - ARM Linux
2013-02-27 10:20 ` Johannes Stezenbach
2013-02-27 15:35 ` Nicolas Pitre
2013-02-27 13:23 ` Kyungsik Lee
2013-02-27 22:21 ` Andrew Morton
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=alpine.LFD.2.03.1302261708120.1254@syhkavp.arg \
--to=nico@fluxnic.net \
--cc=akpm@linux-foundation.org \
--cc=albin.tonnerre@free-electrons.com \
--cc=celinux-dev@lists.celinuxforum.org \
--cc=chan.jeong@lge.com \
--cc=dsterba@suse.cz \
--cc=egon.alter@gmx.net \
--cc=hpa@zytor.com \
--cc=hyojun.im@lge.com \
--cc=jacmet@sunsite.dk \
--cc=jmillenbach@gmail.com \
--cc=josh@joshtriplett.org \
--cc=kyungsik.lee@lge.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kbuild@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@arm.linux.org.uk \
--cc=markus@oberhumer.com \
--cc=mingo@redhat.com \
--cc=mmarek@suse.cz \
--cc=nitingupta910@gmail.com \
--cc=raphael.andy.lee@gmail.com \
--cc=richardcochran@gmail.com \
--cc=rpurdie@openedhand.com \
--cc=tglx@linutronix.de \
--cc=x86@kernel.org \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).