From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: Kyungsik Lee <kyungsik.lee@lge.com>,
Andrew Morton <akpm@linux-foundation.org>
Cc: "Markus F.X.J. Oberhumer" <markus@oberhumer.com>,
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,
Nicolas Pitre <nico@fluxnic.net>,
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: Wed, 27 Feb 2013 09:51:39 +0000 [thread overview]
Message-ID: <20130227095139.GX17833@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <20130227073646.GA22333@Corona>
On Wed, Feb 27, 2013 at 04:36:47PM +0900, Kyungsik Lee wrote:
> Compiler: Linaro ARM gcc 4.6.2
> 2. ARMv7, 1.7GHz based board
> Kernel: linux 3.7
> Uncompressed Kernel Size: 14MB
> Compressed Size Decompression Speed
> LZO 6.0MB 34.1MB/s Old
> ----------------------------------------
> 6.0MB 34.7MB/s New
> 6.0MB 52.2MB/s(UA)
> =============================================
> LZ4 6.5MB 86.7MB/s
> UA: Unaligned memory Access support
That is pretty conclusive - it shows an 8% increase in image size vs a
66% increase in decompression speed. It will take a _lot_ to offset
that increase in decompression speed.
So, what I think is that yes, we should accept LZ4 and drop LZO from
the kernel - the "fast but may not be small" compression title has
clearly been taken by LZ4.
Akpm - what's your thoughts?
next prev parent reply other threads:[~2013-02-27 9:53 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-26 6:24 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
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 [this message]
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
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