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From: Shile Zhang <shile.zhang@linux.alibaba.com>
To: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
	Josh Poimboeuf <jpoimboe@redhat.com>,
	Masahiro Yamada <yamada.masahiro@socionext.com>,
	Michal Marek <michal.lkml@markovi.net>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	x86@kernel.org, "H . Peter Anvin" <hpa@zytor.com>,
	linux-kernel@vger.kernel.org, linux-kbuild@vger.kernel.org
Subject: Re: [RFC PATCH v3 0/7] Speed booting by sorting ORC unwind tables at build time
Date: Fri, 15 Nov 2019 16:24:52 +0800	[thread overview]
Message-ID: <ea339e91-0718-4b8c-dda4-5e4f70d68f24@linux.alibaba.com> (raw)
In-Reply-To: <20191115072511.GA114447@gmail.com>



On 2019/11/15 15:25, Ingo Molnar wrote:
> * Shile Zhang <shile.zhang@linux.alibaba.com> wrote:
>
>> Hi,
>>
>> I refactored the sortextable code and add ORC unwind tables sort
>> support, for kernel boot speedup by sorting kernel tables at build time
>> as much as possible.
>>
>> Followed Peter's suggestion, I put ORC tables sort into a separated
>> thread makes these tables sort concurrently. That helps to avoid
>> kernel's link time as possible.
> Could you please also measure how much boot time this saves,
> approximately, and how long it takes to do it at build time?

Thanks for your review!

I've tested on 2vcpu16GB VM (with 2.5GHz Xeon CPU), it can saves near 90ms.
And the new sorttable tool costs about 0.074s to do extable and orc 
tables sort,
on host with same CPU.
>
> Thanks,
>
> 	Ingo


      reply	other threads:[~2019-11-15  8:24 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-15  6:47 [RFC PATCH v3 0/7] Speed booting by sorting ORC unwind tables at build time Shile Zhang
2019-11-15  6:47 ` [RFC PATCH v3 1/7] scripts/sortextable: Rewrite error/success handling Shile Zhang
2019-11-15  6:47 ` [RFC PATCH v3 2/7] scripts/sortextable: kernel coding style formating Shile Zhang
2019-11-15  6:47 ` [RFC PATCH v3 3/7] scripts/sortextable: Remove dead code Shile Zhang
2019-11-15  6:47 ` [RFC PATCH v3 4/7] scripts/sortextable: refactor do_func() function Shile Zhang
2019-11-15  6:47 ` [RFC PATCH v3 5/7] scripts/sorttable: rename sortextable to sorttable Shile Zhang
2019-11-15  6:47 ` [RFC PATCH v3 6/7] scripts/sorttable: Add ORC unwind tables sort concurrently Shile Zhang
2019-11-15  9:07   ` Peter Zijlstra
2019-11-15  9:43     ` Shile Zhang
2019-11-15 10:33       ` Peter Zijlstra
2019-11-15 17:24       ` Andy Lutomirski
2019-11-18 11:43         ` Shile Zhang
2019-11-15  9:19   ` Peter Zijlstra
2019-11-15  9:45     ` Shile Zhang
2019-11-15  6:47 ` [RFC PATCH v3 7/7] x86/unwind/orc: remove run-time ORC unwind tables sort Shile Zhang
2019-11-15 16:51   ` David Laight
2019-11-15 17:46     ` Josh Poimboeuf
2019-11-18 10:05       ` David Laight
2019-11-18 10:50         ` Shile Zhang
2019-11-18 14:41         ` Josh Poimboeuf
2019-11-15  7:25 ` [RFC PATCH v3 0/7] Speed booting by sorting ORC unwind tables at build time Ingo Molnar
2019-11-15  8:24   ` Shile Zhang [this message]

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