From: Chao Peng <chao.p.peng@linux.intel.com>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
Yinghai Lu <yinghai@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
the arch/x86 maintainers <x86@kernel.org>,
Michal Marek <mmarek@suse.com>, Kees Cook <keescook@chromium.org>,
Baoquan He <bhe@redhat.com>, "H.J. Lu" <hjl.tools@gmail.com>,
Paul Bolle <pebolle@tiscali.nl>,
Masahiro Yamada <yamada.masahiro@socionext.com>,
Borislav Petkov <bp@suse.de>,
Andrew Morton <akpm@linux-foundation.org>,
Arnd Bergmann <arnd@arndb.de>, Petr Mladek <pmladek@suse.com>,
"David S. Miller" <davem@davemloft.net>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Andy Lutomirski <luto@kernel.org>,
Thomas Garnier <thgarnie@google.com>,
Nicolas Pitre <nicolas.pitre@linaro.org>,
Tejun Heo <tj@kernel.org>, Daniel Mack <daniel@zonque.org>,
Helge Deller <deller@gmx.de>, Rik van Riel <riel@redhat.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-kbuild <linux-kbuild@vger.kernel.org>
Subject: Re: [PATCH] x86/boot: Support uncompressed kernel
Date: Mon, 27 Mar 2017 17:25:44 +0800 [thread overview]
Message-ID: <1490606744.3661.7.camel@linux.intel.com> (raw)
In-Reply-To: <20170327075817.bb7wda62fcuvfa4b@linutronix.de>
On Mon, 2017-03-27 at 09:58 +0200, Sebastian Andrzej Siewior wrote:
> On 2017-03-24 13:35:40 [+0800], Chao Peng wrote:
> >
> >
> > >
> > > >
> > > > >
> > > > > kernel kernel size time in
> > > > > decompress_kernel
> > > > > compressed (gzip) 3.3M 53ms
> > > > > uncompressed 14M 3ms
> > > >
> > Exactly, LZ4 is the fastest. It takes 16ms to complete the
> > decompression. Still sounds a little longer when compared to
> > uncompressed kernel.
>
> Are we seriously talking here about one-time improvement of 13ms
> boot time?
The usage model for us is to lunch kernel in virtual machine and there
will be thousands of instances lunched and shutdowned/re-lunched
frequently, so every single million-second helps. And 13ms means 20%
improvement to our existing optimization (the other part besides
decompression is optimized to ~40ms).
Chao
>
> >
> > Chao
>
> Sebastian
next prev parent reply other threads:[~2017-03-27 9:27 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-23 12:51 [PATCH] x86/boot: Support uncompressed kernel Chao Peng
2017-03-23 15:07 ` Yinghai Lu
2017-03-23 15:31 ` Sergey Senozhatsky
2017-03-24 5:35 ` Chao Peng
2017-03-27 7:58 ` Sebastian Andrzej Siewior
2017-03-27 9:25 ` Chao Peng [this message]
2017-03-27 11:47 ` Michal Marek
2017-03-27 13:25 ` Arnd Bergmann
2017-03-28 12:01 ` Chao Peng
2017-03-28 22:38 ` H. Peter Anvin
2017-03-28 22:55 ` Andy Lutomirski
2017-03-24 8:09 ` Michal Marek
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=1490606744.3661.7.camel@linux.intel.com \
--to=chao.p.peng@linux.intel.com \
--cc=akpm@linux-foundation.org \
--cc=arnd@arndb.de \
--cc=bhe@redhat.com \
--cc=bigeasy@linutronix.de \
--cc=bp@suse.de \
--cc=daniel@zonque.org \
--cc=davem@davemloft.net \
--cc=deller@gmx.de \
--cc=hjl.tools@gmail.com \
--cc=hpa@zytor.com \
--cc=keescook@chromium.org \
--cc=linux-kbuild@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=luto@kernel.org \
--cc=mingo@redhat.com \
--cc=mmarek@suse.com \
--cc=nicolas.pitre@linaro.org \
--cc=paulmck@linux.vnet.ibm.com \
--cc=pebolle@tiscali.nl \
--cc=pmladek@suse.com \
--cc=riel@redhat.com \
--cc=sergey.senozhatsky@gmail.com \
--cc=tglx@linutronix.de \
--cc=thgarnie@google.com \
--cc=tj@kernel.org \
--cc=x86@kernel.org \
--cc=yamada.masahiro@socionext.com \
--cc=yinghai@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 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.