From: Thomas Gleixner <tglx@linutronix.de>
To: Len Brown <lenb@kernel.org>
Cc: Maxim Levitsky <maximlevitsky@gmail.com>,
linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
Andrew Morton <akpm@linux-foundation.org>,
Adrian Bunk <bunk@stusta.de>,
Arjan van de Ven <arjan@infradead.org>
Subject: Re: [BUG] 2.6.21-rc1,2,3 regressions on my system that I found so far
Date: Sat, 17 Mar 2007 12:05:52 +0100 [thread overview]
Message-ID: <1174129552.13341.410.camel@localhost.localdomain> (raw)
In-Reply-To: <1174125404.13341.396.camel@localhost.localdomain>
On Sat, 2007-03-17 at 10:56 +0100, Thomas Gleixner wrote:
> calibrating APIC timer ...
> ... lapic delta = 2426884
> ... PM timer delta = 833908
> APIC calibration PIT not consistent with PM Timer: 232ms instead of 100ms
> APIC delta adjusted to PM-Timer: 1041737 (2426884)
> ..... delta 1041737
> ..... mult: 44749065
> ..... calibration result: 166677
> ..... CPU clock speed is 4659.0624 MHz.
> ..... host bus clock speed is 166.0677 MHz.
>
> This box is off by factor 2.3 and using the PM-Timer instead of the
> PIT/jiffies values gives me a correct result.
>
> Another one:
> APIC calibration not consistent with PM Timer: 2020ms instead of 100ms
> APIC delta adjusted to PM-Timer: 1254436 (25341111)
>
> Off by factor 20 !!
This weird behaviour also can be seen with the BogoMIPS calibration:
Calibrating delay using timer specific routine.. 6428.32 BogoMIPS
(lpj=12856647)
....
Initializing CPU#1
Calibrating delay using timer specific routine.. 103837.25 BogoMIPS
(lpj=207674508)
Note, that I never observed that on CPU#0. It always affects CPU#1.
tglx
next prev parent reply other threads:[~2007-03-17 10:59 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-16 10:30 [BUG] 2.6.21-rc1,2,3 regressions on my system that I found so far Maxim Levitsky
2007-03-16 23:19 ` Len Brown
2007-03-17 23:00 ` Maxim
2007-03-17 23:32 ` Thomas Gleixner
2007-12-30 7:50 ` Mike Galbraith
2007-12-30 14:53 ` Ingo Molnar
2007-03-20 11:54 ` sysfs ugly timer interface (was Re: [BUG] 2.6.21-rc1,2,3 regressions on my system that I found so far) Pavel Machek
2007-03-22 15:28 ` Greg KH
2007-03-22 15:41 ` Thomas Gleixner
2007-03-23 1:24 ` sysfs q [was: sysfs ugly timer interface] Jan Engelhardt
2007-03-23 4:48 ` Greg KH
2007-03-23 6:05 ` Jan Engelhardt
2007-03-16 23:39 ` [BUG] 2.6.21-rc1,2,3 regressions on my system that I found so far Thomas Gleixner
2007-03-17 23:01 ` Maxim
2007-03-16 23:44 ` Thomas Gleixner
2007-03-17 0:04 ` [PATCH] i386: trust the PM-Timer calibration of the local APIC timer Thomas Gleixner
2007-03-17 7:22 ` Ingo Molnar
2007-03-17 13:24 ` Andi Kleen
2007-03-18 8:12 ` Andrew Morton
2007-03-18 8:45 ` Thomas Gleixner
2007-03-17 1:32 ` [BUG] 2.6.21-rc1,2,3 regressions on my system that I found so far Len Brown
2007-03-17 9:56 ` Thomas Gleixner
2007-03-17 11:05 ` Thomas Gleixner [this message]
2007-03-17 16:52 ` Thomas Gleixner
2007-03-17 10:32 ` Arjan van de Ven
2007-03-17 13:26 ` Andi Kleen
2007-03-20 4:27 ` Greg KH
2007-03-20 6:30 ` Thomas Gleixner
2007-03-20 9:14 ` Arjan van de Ven
2007-03-20 11:36 ` Andi Kleen
2007-03-20 11:41 ` Oliver Neukum
2007-03-17 22:45 ` Maxim
2007-03-20 5:04 ` Lee Revell
2007-03-20 5:36 ` Eric St-Laurent
2007-03-20 9:15 ` Arjan van de Ven
2007-03-20 18:04 ` Andy Lutomirski
2007-03-20 22:58 ` Eric St-Laurent
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