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Date:      Fri, 10 Jan 2003 00:10:38 +0000
From:      Bruce Cran <bruce@cran.org.uk>
To:        Terry Lambert <tlambert2@mindspring.com>
Cc:        current@freebsd.org
Subject:   Re: update from 4.7 to 5.0
Message-ID:  <20030110001038.GA718@fourtytwo>
In-Reply-To: <3E1DD8ED.4C5B025@mindspring.com>
References:  <20030109110335.GA65353@ns2.wananchi.com> <20030109115717.GA1257@HAL9000.homeunix.com> <3E1DD8ED.4C5B025@mindspring.com>

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On Thu, Jan 09, 2003 at 12:17:49PM -0800, Terry Lambert wrote:
> David Schultz wrote:
> > Thus spake Odhiambo Washington <wash@wananchi.com>:
> > > acpi_cpu: CPU throttling enabled, 2 steps from 100% to 50.0%
> > > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> > >
> > > Where is that explained? I'd really love to know about it ;)
> > 
> > That's just the ACPI driver telling you that your CPU has a
> > reduced power (half speed) mode.
> 
> Can I vote for replacing "enabled" with "available", so it does
> not look like it's being turned on on you, so that you have to
> post to this mailing list asking about it, in the future?

I think what's needed is some good documentation about CPU throttling,
because people are intrigued when they see it, and wonder what it does
and how you tune it.   I know I was surprised when, for the first time
ever, I was told I could throttle my Athlon XP - I didn't even know it could be.   I know it's fairly experimental, but I think this
feature needs better documentation and development - for example, at the
moment it's possible to set the economy_mode value to 0, which shouldn't
be allowed.  Other than that, it's a fantastic ACPI implementation, I'd
say it's the best of any OS!

--
Bruce Cran

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