From: Linus Torvalds <torvalds@linux-foundation.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: linux-kernel@vger.kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Borislav Petkov <borislav.petkov@amd.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [GIT PULL] x86/cpu changes for v2.6.34
Date: Sun, 28 Feb 2010 12:45:51 -0800 (PST) [thread overview]
Message-ID: <alpine.LFD.2.00.1002281239550.3637@localhost.localdomain> (raw)
In-Reply-To: <alpine.LFD.2.00.1002281205320.27475@localhost.localdomain>
On Sun, 28 Feb 2010, Linus Torvalds wrote:
>
> I haven't bisected this, but something slowed down in bootup on my machine
> recently.
Hmm. I take that back. It's not consistent, and it's not recent after all.
It comes and goes:
[torvalds@nehalem linux]$ grep "CPU 7 MCA" /var/log/messages-* /var/log/messages | cut -d: -f5-
[ 0.898396] CPU 7 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 0.898400] CPU 7 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 1.596240] CPU 7 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 0.898394] CPU 7 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 1.600229] CPU 7 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 0.898395] CPU 7 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 0.901211] CPU 7 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 2.633298] CPU 7 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 0.898393] CPU 7 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 0.901210] CPU 7 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 0.898395] CPU 7 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 0.898393] CPU 7 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 0.898393] CPU 7 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 0.898402] CPU 7 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 0.901213] CPU 7 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 0.898392] CPU 7 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 0.898395] CPU 7 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 1.601467] CPU 7 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 0.898401] CPU 7 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 0.898395] CPU 7 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 0.898397] CPU 7 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
note how it's pretty consistently at about the 0.89s mark, but then
there's a _couple_ of times when it's taken rather longer to boot. But the
delay is always in that CPU bringup phase, because doing the same grep for
"CPU 0 MCA" gives consistently low numbers (0.0005s).
Linus
next prev parent reply other threads:[~2010-02-28 20:46 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-27 15:09 Ingo Molnar
2010-02-27 17:10 ` Arjan van de Ven
2010-02-27 20:03 ` H. Peter Anvin
2010-02-28 20:09 ` Linus Torvalds
2010-02-28 20:45 ` Linus Torvalds [this message]
2010-03-01 8:00 ` Ingo Molnar
2010-03-01 13:17 ` Frederic Weisbecker
2010-03-01 16:47 ` Linus Torvalds
2010-03-01 19:42 ` Steven Rostedt
2010-03-01 22:23 ` Steven Rostedt
2010-03-01 22:24 ` H. Peter Anvin
2010-03-01 19:29 ` Steven Rostedt
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