From: "Arnd Bergmann" <arnd@arndb.de>
To: "Jonathan Neuschäfer" <j.neuschaefer@gmx.net>,
linux-arm-kernel@lists.infradead.org
Cc: "Russell King" <linux@armlinux.org.uk>,
"Nick Terrell" <terrelln@fb.com>,
"Tony Lindgren" <tony@atomide.com>,
"Geert Uytterhoeven" <geert+renesas@glider.be>,
"Linus Walleij" <linus.walleij@linaro.org>,
"Sebastian Reichel" <sebastian.reichel@collabora.com>,
"Hawkins, Nick" <nick.hawkins@hpe.com>,
"Christophe Leroy" <christophe.leroy@csgroup.eu>,
"Florian Fainelli" <f.fainelli@gmail.com>,
"Nick Desaulniers" <ndesaulniers@google.com>,
"Xin Li" <xin3.li@intel.com>,
"Seung-Woo Kim" <sw0312.kim@samsung.com>,
"Paul Bolle" <pebolle@tiscali.nl>,
"Bart Van Assche" <bvanassche@acm.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/3] ARM ZSTD boot compression
Date: Wed, 12 Apr 2023 23:33:15 +0200 [thread overview]
Message-ID: <9ae523ae-aad4-40b1-8b6b-d5e18bf8b92a@app.fastmail.com> (raw)
In-Reply-To: <20230412212126.3966502-1-j.neuschaefer@gmx.net>
On Wed, Apr 12, 2023, at 23:21, Jonathan Neuschäfer wrote:
> This patchset enables ZSTD kernel (de)compression on 32-bit ARM.
> Unfortunately, it is much slower than I hoped (tested on ARM926EJ-S):
>
> - LZO: 7.2 MiB, 6 seconds
> - ZSTD: 5.6 MiB, 60 seconds
That seems unexpected, as the usual numbers say it's about 25%
slower than LZO. Do you have an idea why it is so much slower
here? How long does it take to decompress the
generated arch/arm/boot/Image file in user space on the same
hardware using lzop and zstd?
Arnd
next prev parent reply other threads:[~2023-04-12 21:34 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-12 21:21 Jonathan Neuschäfer
2023-04-12 21:21 ` [PATCH 1/3] ARM: compressed: Pass the actual output length to the decompressor Jonathan Neuschäfer
2023-04-12 21:42 ` Linus Walleij
2023-04-12 21:48 ` Florian Fainelli
2023-04-13 5:20 ` Tony Lindgren
2023-04-15 1:52 ` Jonathan Neuschäfer
2023-04-12 21:21 ` [PATCH 2/3] ARM: compressed: Bump MALLOC_SIZE to 128 KiB Jonathan Neuschäfer
2023-04-12 21:43 ` Linus Walleij
2023-04-12 21:48 ` Florian Fainelli
2023-05-02 8:39 ` Russell King (Oracle)
2023-04-12 21:21 ` [PATCH 3/3] ARM: compressed: Enable ZSTD compression Jonathan Neuschäfer
2023-04-12 21:45 ` Linus Walleij
2023-04-12 21:49 ` Florian Fainelli
2023-04-12 21:33 ` Arnd Bergmann [this message]
2023-04-13 11:13 ` [PATCH 0/3] ARM ZSTD boot compression Arnd Bergmann
2023-04-15 2:00 ` Jonathan Neuschäfer
2023-10-12 22:33 ` Nick Terrell
2023-10-13 1:27 ` J. Neuschäfer
2023-10-20 18:53 ` Nick Terrell
2023-04-14 22:50 ` Jonathan Neuschäfer
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