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Date: Tue, 23 Sep 2008 11:30:12 -0400
From: Masami Hiramatsu <mhiramat@redhat.com>
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To: Mathieu Desnoyers <compudj@krystal.dyndns.org>
CC: Martin Bligh <mbligh@google.com>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Linus Torvalds <torvalds@linux-foundation.org>,
       Thomas Gleixner <tglx@linutronix.de>,
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       "Frank Ch. Eigler" <fche@redhat.com>,
       systemtap-ml <systemtap@sources.redhat.com>
Subject: Re: Unified tracing buffer
References: <33307c790809191433w246c0283l55a57c196664ce77@mail.gmail.com> <48D7F5E8.3000705@redhat.com> <33307c790809221313s3532d851g7239c212bc72fe71@mail.gmail.com> <48D81B5F.2030702@redhat.com> <33307c790809221616h5e7410f5gc37c262d83722111@mail.gmail.com> <48D832B6.3010409@redhat.com> <33307c790809221712x4fbd9781u958c98d4585e92a9@mail.gmail.com> <48D901FE.5060604@redhat.com> <20080923150410.GA28341@Krystal>
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Mathieu Desnoyers wrote:
> * Masami Hiramatsu (mhiramat@redhat.com) wrote:
> [...]
>> $ cat /proc/cpuinfo
>> processor	: 0
>> vendor_id	: GenuineIntel
>> cpu family	: 6
>> model		: 15
>> model name	: Intel(R) Core(TM)2 CPU         T7200  @ 2.00GHz
>> stepping	: 6
>> cpu MHz		: 1000.000
> [...]
> 
> ... @ 2.00GHz and cpu MHz : 1000.000 ; isn't that a bit odd ? (same for
> both cpus)

2.00GHz is the maximum(model) frequency. And 'cpu MHz' means
current frequency. (yep, now I'm using cpufreq)
Anyway, when I measured TSC drift, I killed cpuspeed service and
fixed freq to 2000. ;-)

Thank you,

-- 
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America) Inc.
Software Solutions Division

e-mail: mhiramat@redhat.com