linux-kernel - Re: [patch 00/22] high resolution timers / dynamic ticks

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Date:	Thu, 5 Oct 2006 10:23:48 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Andrew Morton <akpm@...l.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>,
	John Stultz <johnstul@...ibm.com>,
	Valdis Kletnieks <valdis.kletnieks@...edu>,
	Arjan van de Ven <arjan@...radead.org>,
	Dave Jones <davej@...hat.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Jim Gettys <jg@...top.org>,
	Roman Zippel <zippel@...ux-m68k.org>
Subject: Re: [patch 00/22] high resolution timers / dynamic ticks - V3


* Andrew Morton <akpm@...l.org> wrote:

> It just did something:
> 
> [   12.112000] kjournald starting.  Commit interval 5 seconds
> [   12.160000] EXT3-fs: recovery complete.
> [   12.164000] EXT3-fs: mounted filesystem with ordered data mode.
> [   12.980000] audit(1160010604.980:2): enforcing=1 old_enforcing=0 auid=4294967295
> [   18.808000] security:  3 users, 6 roles, 1417 types, 151 bools, 1 sens, 256 cats
> [   18.812000] security:  57 classes, 41080 rules
> [   18.816000] SELinux:  Completing initialization.
> [   18.816000] SELinux:  Setting up existing superblocks.
> [   18.824000] SELinux: initialized (dev sda6, type ext3), uses xattr
> [   18.860000] SELinux: initialized (dev tmpfs, type tmpfs), uses transition SIDs
> 
> 
> Those "six seconds" took at least three minutes.  With luck I'll have 
> a login prompt tomorrow morning.

as per your previous stats, the ratio between expected and real local 
APIC timer IRQs is 3:250. So if your normal bootup takes 1 minute, you 
should be up and running in an hour or so :-/

you should be seeing similar symptoms when booting the x86 SMP kernel on 
that box. Or is the anomalously slow LOC count only an artifact of the 
hres tree?

	Ingo
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