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 12:09:46 -0800 (PST) [thread overview]
Message-ID: <alpine.LFD.2.00.1002281205320.27475@localhost.localdomain> (raw)
In-Reply-To: <20100227150942.GA6394@elte.hu>
I haven't bisected this, but something slowed down in bootup on my machine
recently.
See the timestamps:
[ 0.000000] Linux version 2.6.33-01832-g30ff056
...
[ 0.010066] Enabled Interrupt-remapping
[ 0.010120] Setting APIC routing to physical flat
[ 0.010180] DRHD: handling fault status reg 2
[ 0.010582] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
[ 0.049955] CPU0: Genuine Intel(R) CPU 000 @ 3.20GHz stepping 04
[ 0.157195] Booting Node 0, Processors #1
[ 0.245179] CPU 1 MCA banks CMCI:2 CMCI:3 CMCI:5 SHD:6 SHD:8
[ 0.265332] #2
[ 0.353185] CPU 2 MCA banks CMCI:2 CMCI:3 CMCI:5 SHD:6 SHD:8
[ 0.373328] #3
[ 2.193277] CPU 3 MCA banks CMCI:2 CMCI:3 CMCI:5 SHD:6 SHD:8
[ 2.213379] #4
[ 2.301283] CPU 4 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 2.321391] #5
[ 2.417287] CPU 5 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 2.437356] #6
[ 2.525293] CPU 6 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 2.545354] #7
[ 2.633298] CPU 7 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 2.653423] Brought up 8 CPUs
[ 2.653571] Total of 8 processors activated (51201.44 BogoMIPS).
what happened there for almost 2 seconds in between CPU#3 and CPU#4?
It wasn't very fast before either, but it was way better:
[ 0.050298] CPU0: Genuine Intel(R) CPU 000 @ 3.20GHz stepping 04
[ 0.156725] Booting Node 0, Processors #1
[ 0.244410] CPU 1 MCA banks CMCI:2 CMCI:3 CMCI:5 SHD:6 SHD:8
[ 0.264458] #2
[ 0.352078] CPU 2 MCA banks CMCI:2 CMCI:3 CMCI:5 SHD:6 SHD:8
[ 0.372147] #3
[ 0.459746] CPU 3 MCA banks CMCI:2 CMCI:3 CMCI:5 SHD:6 SHD:8
[ 0.479838] #4
[ 0.567415] CPU 4 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 0.587446] #5
[ 0.683057] CPU 5 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 0.703081] #6
[ 0.790724] CPU 6 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 0.810748] #7
[ 0.898393] CPU 7 MCA banks SHD:2 SHD:3 SHD:5 SHD:6 SHD:8
[ 0.918412] Brought up 8 CPUs
[ 0.918562] Total of 8 processors activated (51203.34 BogoMIPS).
what is it that takes so long to bring those CPU's up?
Linus
next prev parent reply other threads:[~2010-02-28 20:10 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 [this message]
2010-02-28 20:45 ` Linus Torvalds
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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