From: Bill Davidsen <davidsen@tmr.com>
To: Pavel Machek <pavel@ucw.cz>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Power consumption HZ100, HZ250, HZ1000: new numbers
Date: Wed, 10 Aug 2005 15:08:04 -0400 [thread overview]
Message-ID: <42FA5094.4010702@tmr.com> (raw)
In-Reply-To: <20050730100658.GB1942@elf.ucw.cz>
Pavel Machek wrote:
> Hi!
>
>
>>I was finally able to get C3 state working. It seems that my BIOS is
>>leaving USB controllers in an active state(?). Without any USB drivers
>>loaded, C3 is not possible. With drivers loaded, but no device plugged
>>in C3 works fine. Kernel is 2.6.13-rc3-mm3 + acpi-sbs.
>>
>>With working C3 there are indeed differences:
>>
>>Voltage is 16.5 V
>>
>>HZ=100: ~460 mA => 7.59 W
>>HZ=250: ~468 mA => 7.72 W
>>HZ=1000: ~494 mA => 8.15 W
>
>
> 0.55W difference, wow. And that's 7% difference to overall system
> consumption.
But it's totally meaning less isn't it? Disable the USB, there goes the
kb/mouse, turn off the LCD you can't see anything, spin down the disk,
you can't do i/o, and run the CPU in idle so you can't DO anything.
At that point you might as well turn it off and save 100%.
next prev parent reply other threads:[~2005-08-10 19:03 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-29 22:49 Power consumption HZ100, HZ250, HZ1000: new numbers Marc Ballarin
2005-07-29 23:15 ` Lee Revell
2005-07-30 10:06 ` Marc Ballarin
2005-07-30 18:05 ` Lee Revell
2005-07-30 18:18 ` Zwane Mwaikambo
2005-07-30 18:14 ` Lee Revell
2005-07-30 18:35 ` Lee Revell
2005-08-01 20:00 ` Lee Revell
2005-07-30 19:51 ` Pavel Machek
2005-07-30 20:04 ` Lee Revell
2005-07-30 20:10 ` Pavel Machek
2005-07-31 20:21 ` James Bruce
2005-07-31 21:10 ` Pavel Machek
2005-07-31 21:41 ` Lee Revell
2005-07-31 21:57 ` James Bruce
2005-07-31 22:32 ` Pavel Machek
2005-07-31 23:20 ` Bernd Eckenfels
2005-08-01 1:59 ` Kyle Moffett
2005-08-02 9:08 ` Tomasz Torcz
2005-07-31 21:54 ` Lee Revell
2005-07-31 22:02 ` Lee Revell
2005-07-31 22:18 ` James Bruce
2005-07-31 22:07 ` Jim Crilly
2005-07-31 22:36 ` Pavel Machek
2005-07-31 22:39 ` Lee Revell
2005-08-01 3:49 ` Jim Crilly
2005-08-01 7:26 ` Pavel Machek
2005-08-01 18:16 ` Jim Crilly
2005-08-10 18:49 ` Bill Davidsen
2005-07-31 22:12 ` James Bruce
2005-07-31 22:47 ` Pavel Machek
2005-07-31 23:23 ` Lee Revell
2005-07-31 23:29 ` Pavel Machek
2005-07-31 23:53 ` Lee Revell
2005-08-01 7:28 ` Pavel Machek
2005-08-10 19:00 ` Bill Davidsen
2005-08-01 6:19 ` Stefan Seyfried
2005-08-01 16:07 ` Jan Knutar
2005-08-01 18:45 ` Lee Revell
2005-08-02 9:13 ` Tomasz Torcz
2005-08-02 14:58 ` Lee Revell
2005-08-01 7:44 ` David Weinehall
2005-08-01 16:18 ` James Bruce
2005-08-01 19:27 ` Lee Revell
2005-08-01 20:42 ` Theodore Ts'o
2005-08-02 4:50 ` James Bruce
2005-08-02 13:10 ` Stephen Clark
2005-08-02 14:02 ` Lee Revell
2005-08-02 14:12 ` Jens Axboe
2005-08-02 17:06 ` Folkert van Heusden
2005-08-02 17:45 ` linux-os (Dick Johnson)
2005-08-02 17:55 ` Lee Revell
2005-08-02 14:15 ` Con Kolivas
2005-08-02 14:20 ` Lars Marowsky-Bree
2005-08-02 14:22 ` Lee Revell
2005-08-02 15:18 ` Joel Jaeggli
2005-08-03 8:53 ` Oliver Neukum
2005-08-02 14:43 ` Jeff Garzik
2005-08-02 14:52 ` Lee Revell
2005-08-02 19:26 ` Lars Marowsky-Bree
2005-08-02 15:42 ` James Bruce
2005-08-02 15:58 ` Lee Revell
2005-08-02 17:02 ` Prakash Punnoor
2005-08-02 16:08 ` Ondrej Zary
2005-08-05 6:39 ` James Bruce
2005-08-11 19:22 ` Ondrej Zary
2005-08-03 9:19 ` Hans Kristian Rosbach
2005-08-03 13:57 ` Dmitry Torokhov
2005-08-04 12:52 ` Hans Kristian Rosbach
2005-08-02 6:45 ` Tony Lindgren
2005-08-02 11:23 ` Pavel Machek
2005-08-02 14:08 ` Lee Revell
2005-08-02 14:31 ` Roman Zippel
2005-08-02 11:25 ` Pavel Machek
2005-08-02 14:07 ` Lee Revell
2005-08-03 17:13 ` Stephen Ray
2005-08-03 19:12 ` Lee Revell
2005-07-30 20:08 ` Lee Revell
2005-07-30 10:06 ` Pavel Machek
2005-08-10 19:08 ` Bill Davidsen [this message]
-- strict thread matches above, loose matches on Subject: below --
2005-08-03 15:20 ambx1
2005-08-03 16:47 ` James Bruce
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