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Date: Fri, 12 Dec 2003 01:32:48 +0100 (CET)
From: Lukas Ertl <l.ertl@univie.ac.at>
To: acpi-jp@jp.FreeBSD.org, Nate Lawson <nate@root.org>
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cc: current@freebsd.org
Subject: Re: [acpi-jp 2878] Re: ACPI throttling changes
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On Thu, 11 Dec 2003, Nate Lawson wrote:

> On Tue, 9 Dec 2003, Nate Lawson wrote:
> >
> >    sysctl hw.acpi.cpu.current_speed=X
> >
> >     dd if=/dev/zero bs=1m count=500 | md5
> >
> Haven't gotten any responses to this yet.  Would someone who has working
> throttling support apply the patch and test that they can indeed change
> throttling through the sysctl listed above?

Well, seems to work, but I'm not sure if it works correctly:

# sysctl hw.acpi.cpu.current_speed=8
# dd if=/dev/zero bs=1m count=500 | md5
524288000 bytes transferred in 10.128099 secs (51765687 bytes/sec)

# sysctl hw.acpi.cpu.current_speed=4
# dd if=/dev/zero bs=1m count=500 | md5
524288000 bytes transferred in 12.186178 secs (43023169 bytes/sec)

# sysctl hw.acpi.cpu.current_speed=1
# dd if=/dev/zero bs=1m count=500 | md5
524288000 bytes transferred in 12.127831 secs (43230154 bytes/sec)

regards,
le

-- 
Lukas Ertl                             eMail: l.ertl@univie.ac.at
UNIX Systemadministrator               Tel.:  (+43 1) 4277-14073
Vienna University Computer Center      Fax.:  (+43 1) 4277-9140
University of Vienna                   http://mailbox.univie.ac.at/~le/