From: Chris Wedgwood <cw@f00f.org>
To: Andrew Morton <akpm@osdl.org>
Cc: Lee Revell <rlrevell@joe-job.com>,
"Brown, Len" <len.brown@intel.com>,
dtor_core@ameritech.net, torvalds@osdl.org, vojtech@suse.cz,
david.lang@digitalinsight.com, davidsen@tmr.com,
kernel@kolivas.org, linux-kernel@vger.kernel.org,
mbligh@mbligh.org, diegocg@gmail.com, azarah@nosferatu.za.org,
christoph@lameter.com
Subject: Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt
Date: Wed, 13 Jul 2005 14:16:50 -0700 [thread overview]
Message-ID: <20050713211650.GA12127@taniwha.stupidest.org> (raw)
In-Reply-To: <20050713134857.354e697c.akpm@osdl.org>
On Wed, Jul 13, 2005 at 01:48:57PM -0700, Andrew Morton wrote:
> Len Brown, a year ago: "The bottom line number to laptop users is
> battery lifetime. Just today somebody complained to me that Windows
> gets twice the battery life that Linux does."
It seems the motivation for lower HZ is really:
(1) ACPI/SMM suckage in laptops
(2) NUMA systems with *horrible* remote memory latencies
Both can be detected from you .config and we could see HZ as needed
there and everyone else could avoid this surely?
The above one year old comment where it says "someone complained"
makes me wonder if we ever had an original report with hard facts or
just some internal/private comment/bug about how things seem.
Surely we can test this accurately?
> "My expectation is if we want to beat the competition, we'll want
> the ability to go *under* 100Hz."
What does Windows do here?
> Len, any updates on the relationship between HZ and power
> consumption?
I can measure this[1] for some *old* hardware but as it has unusable
behavior for ACPI I'm not sure how useful that is.
[1] I was just going to remove batteries and run it from a bench
supply in the lab and measure how much current was being drawn.
Can anyone suggest something more sensible than that?
next prev parent reply other threads:[~2005-07-13 21:21 UTC|newest]
Thread overview: 238+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200506231828.j5NISlCe020350@hera.kernel.org>
2005-07-08 21:49 ` [PATCH] i386: Selectable Frequency of the Timer Interrupt Chris Wedgwood
2005-07-08 21:59 ` Andrew Morton
2005-07-08 22:05 ` Chris Wedgwood
2005-07-08 22:08 ` Linus Torvalds
2005-07-10 10:45 ` Denis Vlasenko
2005-07-08 22:22 ` Lee Revell
2005-07-08 22:33 ` Andrew Morton
2005-07-08 22:59 ` Martin J. Bligh
2005-07-08 23:03 ` Chris Wedgwood
2005-07-08 23:14 ` Martin J. Bligh
2005-07-08 23:29 ` David S. Miller
2005-07-08 23:40 ` Lee Revell
2005-07-09 17:08 ` Martin Schlemmer
2005-07-09 18:16 ` Lee Revell
2005-07-09 18:31 ` Arjan van de Ven
2005-07-09 18:33 ` Chris Wedgwood
2005-07-09 18:36 ` Lee Revell
2005-07-09 19:12 ` Andrew Morton
2005-07-09 19:16 ` Lee Revell
2005-07-09 20:30 ` randy_dunlap
2005-07-09 21:25 ` Lee Revell
2005-07-09 23:30 ` Randy Dunlap
2005-07-11 18:35 ` Martin J. Bligh
2005-07-11 13:23 ` Alan Cox
2005-07-11 14:05 ` Theodore Ts'o
2005-07-11 14:08 ` Arjan van de Ven
2005-07-11 15:18 ` Alan Cox
2005-07-12 2:13 ` Eric St-Laurent
2005-07-11 16:02 ` Chris Wedgwood
2005-07-15 12:17 ` Pavel Machek
2005-07-13 15:59 ` Bill Davidsen
2005-07-13 16:47 ` Lee Revell
2005-07-10 0:44 ` pmarques
2005-07-09 18:39 ` Diego Calleja
2005-07-09 18:41 ` Lee Revell
2005-07-09 18:49 ` Lee Revell
2005-07-09 18:50 ` Chris Wedgwood
2005-07-11 18:38 ` Martin J. Bligh
2005-07-11 20:25 ` Lee Revell
2005-07-11 20:39 ` Chris Friesen
2005-07-12 0:30 ` Lee Revell
2005-07-12 4:07 ` Martin J. Bligh
2005-07-12 4:13 ` Lee Revell
2005-07-12 4:30 ` Martin J. Bligh
2005-07-12 14:21 ` Lee Revell
2005-07-12 14:24 ` Lee Revell
2005-07-12 14:56 ` Martin J. Bligh
2005-07-12 15:00 ` Lee Revell
2005-07-12 15:08 ` Martin J. Bligh
2005-07-12 15:10 ` Lee Revell
2005-07-12 15:22 ` Martin J. Bligh
2005-07-12 19:30 ` Lee Revell
2005-07-12 20:58 ` Lee Revell
2005-07-12 22:22 ` Martin J. Bligh
2005-07-13 5:37 ` Lee Revell
2005-07-13 10:38 ` Jan Engelhardt
2005-07-13 18:42 ` High irq load (Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt) Linus Torvalds
2005-07-14 14:25 ` Peter Osterlund
2005-07-18 5:53 ` Herbert Poetzl
2005-07-12 0:38 ` [PATCH] i386: Selectable Frequency of the Timer Interrupt George Anzinger
2005-07-12 12:10 ` Vojtech Pavlik
2005-07-12 12:39 ` Con Kolivas
2005-07-12 12:52 ` Con Kolivas
2005-07-12 15:57 ` George Anzinger
2005-07-12 16:27 ` Vojtech Pavlik
2005-07-13 16:26 ` Bill Davidsen
2005-07-13 16:46 ` Lee Revell
2005-07-13 17:24 ` David Lang
2005-07-13 18:42 ` Vojtech Pavlik
2005-07-13 19:10 ` Linus Torvalds
2005-07-13 19:13 ` Lee Revell
2005-07-13 19:32 ` Dmitry Torokhov
2005-07-13 19:33 ` Martin J. Bligh
2005-07-13 20:02 ` Fernando Lopez-Lezcano
2005-07-13 20:17 ` Lee Revell
2005-07-13 20:24 ` Lee Revell
2005-07-13 20:48 ` Andrew Morton
2005-07-13 21:16 ` Chris Wedgwood [this message]
2005-07-13 21:24 ` Lee Revell
2005-07-13 21:35 ` Martin J. Bligh
2005-07-13 21:37 ` Chris Friesen
2005-07-13 21:56 ` Chris Wedgwood
2005-07-13 23:07 ` George Anzinger
2005-07-13 21:29 ` Martin J. Bligh
2005-07-13 21:30 ` Lee Revell
2005-07-13 23:41 ` dean gaudet
2005-07-14 0:07 ` Petr Vandrovec
2005-07-14 9:24 ` Jan Engelhardt
2005-07-14 14:20 ` Lee Revell
2005-07-14 18:05 ` Jan Engelhardt
2005-07-14 18:20 ` Linus Torvalds
2005-07-14 0:51 ` Chris Wedgwood
2005-07-14 1:13 ` dean gaudet
2005-07-14 1:33 ` Lee Revell
2005-07-14 1:54 ` Linus Torvalds
2005-07-14 7:42 ` Arjan van de Ven
2005-07-14 12:13 ` Vojtech Pavlik
2005-07-14 16:37 ` Linus Torvalds
2005-07-14 17:02 ` Arjan van de Ven
2005-07-14 17:21 ` Linus Torvalds
2005-07-14 19:09 ` Russell King
2005-07-14 20:06 ` Linus Torvalds
2005-07-14 20:30 ` Russell King
2005-07-15 8:15 ` Gerd Knorr
2005-07-14 20:38 ` Johannes Stezenbach
2005-07-14 17:42 ` Al Boldi
2005-07-14 19:42 ` john stultz
2005-07-14 20:13 ` Linus Torvalds
2005-07-14 20:41 ` Christoph Lameter
2005-07-14 23:03 ` Chris Wedgwood
2005-07-14 21:54 ` john stultz
2005-07-14 22:43 ` Alan Cox
2005-07-14 23:19 ` Linus Torvalds
2005-07-15 12:33 ` Alan Cox
2005-07-14 17:10 ` Chris Friesen
2005-07-14 17:24 ` Linus Torvalds
2005-07-14 19:18 ` john stultz
2005-07-14 22:37 ` Alan Cox
2005-07-14 23:13 ` Linus Torvalds
2005-07-14 23:32 ` Linus Torvalds
2005-07-15 1:17 ` Eric St-Laurent
2005-07-14 23:17 ` Lee Revell
2005-07-14 23:25 ` Linus Torvalds
2005-07-14 23:41 ` Lee Revell
2005-07-14 23:49 ` Linus Torvalds
2005-07-14 23:53 ` Lee Revell
2005-07-15 12:42 ` Bill Davidsen
2005-07-14 23:57 ` Lee Revell
2005-07-15 2:30 ` Fernando Lopez-Lezcano
2005-07-15 12:46 ` Bill Davidsen
2005-07-15 16:46 ` Fernando Lopez-Lezcano
2005-07-30 5:49 ` [GIT PATCH] ACPI patches for 2.6.13 Len Brown
2005-07-30 9:58 ` [ACPI] " Pavel Machek
2005-08-03 23:16 ` [GIT PATCH] ACPI patches for 2.6.13-rc5 Len Brown
2005-08-04 17:11 ` [GIT PATCH] ACPI patches for 2.6.13-rc5+ Len Brown
2005-08-15 20:35 ` [GIT PATCH] ACPI patch for 2.6.13-rc6 Len Brown
2005-07-14 23:50 ` [PATCH] i386: Selectable Frequency of the Timer Interrupt Lee Revell
2005-07-15 4:08 ` Con Kolivas
2005-07-15 4:17 ` Lee Revell
2005-07-15 4:54 ` Zwane Mwaikambo
2005-07-15 16:59 ` Lee Revell
2005-07-15 14:51 ` kernel
2005-07-14 18:00 ` Andrew Morton
2005-07-14 8:38 ` Ingo Molnar
2005-07-14 14:55 ` Lee Revell
2005-07-14 15:02 ` Christoph Lameter
2005-07-14 15:25 ` Lee Revell
2005-07-15 11:38 ` [OT] high precision hardware (was Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt) Paul Jakma
2005-07-15 15:57 ` Christoph Lameter
2005-07-15 16:13 ` Lee Revell
2005-07-14 2:08 ` [PATCH] i386: Selectable Frequency of the Timer Interrupt Lee Revell
2005-07-14 9:56 ` Maciej W. Rozycki
2005-07-15 0:04 ` Jesper Juhl
2005-07-15 0:15 ` Lee Revell
2005-07-15 0:17 ` Jesper Juhl
2005-07-15 0:42 ` Linus Torvalds
2005-07-15 8:41 ` Russell King
2005-07-15 0:24 ` Linus Torvalds
2005-07-15 1:40 ` Jesper Juhl
2005-07-15 2:00 ` Eric St-Laurent
2005-07-15 19:58 ` Stephen Pollei
2005-07-16 5:16 ` Eric St-Laurent
2005-07-15 2:07 ` Bill Davidsen
2005-07-15 9:36 ` Matthias Urlichs
2005-07-15 3:46 ` Jesper Juhl
2005-07-15 5:04 ` Linus Torvalds
2005-07-15 13:12 ` Jesper Juhl
2005-07-17 2:13 ` Jesper Juhl
2005-07-17 2:35 ` Lee Revell
2005-07-17 2:35 ` Nish Aravamudan
2005-07-17 3:55 ` Lee Revell
2005-07-23 23:40 ` randy_dunlap
2005-07-25 13:26 ` Vojtech Pavlik
2005-07-23 23:48 ` randy_dunlap
2005-07-23 23:52 ` Jesper Juhl
2005-07-24 12:58 ` Bill Davidsen
2005-07-15 8:44 ` Russell King
2005-07-15 15:41 ` Pavel Machek
2005-07-13 20:02 ` Diego Calleja
2005-07-13 19:35 ` Benjamin LaHaise
2005-07-13 19:41 ` Vojtech Pavlik
2005-07-13 19:53 ` Benjamin LaHaise
2005-07-14 10:04 ` Maciej W. Rozycki
2005-07-13 19:52 ` George Anzinger
2005-07-13 23:54 ` Con Kolivas
2005-07-14 0:43 ` George Anzinger
2005-07-14 10:25 ` Krzysztof Halasa
2005-07-14 12:19 ` Vojtech Pavlik
2005-07-14 21:19 ` Krzysztof Halasa
2005-07-15 1:19 ` Bill Davidsen
2005-07-12 13:30 ` Vojtech Pavlik
2005-07-12 14:05 ` Jan Engelhardt
2005-07-12 16:07 ` Vojtech Pavlik
2005-07-12 15:26 ` [PATCH] " Martin J. Bligh
2005-07-12 17:50 ` john stultz
2005-07-12 22:30 ` Nishanth Aravamudan
2005-07-12 17:56 ` john stultz
2005-07-12 0:45 ` Lee Revell
2005-07-11 13:18 ` Alan Cox
[not found] <F7DC2337C7631D4386A2DF6E8FB22B300410F46A@hdsmsx401.amr.corp.intel.com.suse.lists.linux.kernel>
2005-07-15 17:02 ` Andi Kleen
2005-07-15 17:23 ` Venkatesh Pallipadi
2005-07-15 17:54 ` Maciej W. Rozycki
2005-07-15 17:58 ` Andi Kleen
2005-07-18 10:47 ` Maciej W. Rozycki
2005-07-15 18:01 ` Venkatesh Pallipadi
2005-07-18 11:17 ` Maciej W. Rozycki
2005-07-15 17:57 ` Andi Kleen
2005-07-15 18:09 ` Venkatesh Pallipadi
2005-07-15 16:33 Brown, Len
2005-07-15 16:54 ` Chris Wedgwood
-- strict thread matches above, loose matches on Subject: below --
2005-07-14 21:35 Brown, Len
2005-07-15 9:37 ` Maciej W. Rozycki
2005-05-16 19:45 christoph
2005-05-16 20:51 ` Lee Revell
2005-05-17 0:55 ` christoph
2005-05-17 23:25 ` Lee Revell
2005-05-17 23:48 ` Nish Aravamudan
2005-05-18 0:03 ` Valdis.Kletnieks
2005-05-18 0:08 ` Lee Revell
2005-05-16 22:09 ` Andrew Morton
2005-05-17 2:38 ` Christoph Lameter
2005-05-17 2:46 ` randy_dunlap
2005-05-17 2:55 ` Christoph Lameter
2005-05-17 3:01 ` randy_dunlap
2005-05-17 3:37 ` Linus Torvalds
2005-05-17 3:40 ` Andi Kleen
2005-05-17 10:51 ` Paulo Marques
2005-05-17 13:19 ` Andi Kleen
2005-05-17 5:31 ` Christoph Lameter
2005-05-17 13:44 ` Joe Korty
2005-05-17 13:58 ` Andi Kleen
2005-05-17 15:43 ` Christoph Lameter
2005-05-18 18:50 ` Pavel Machek
2005-05-18 19:03 ` Lee Revell
2005-05-18 20:41 ` Tony Lindgren
2005-05-18 19:25 ` Linus Torvalds
2005-05-18 20:46 ` Tony Lindgren
2005-05-17 3:01 ` Coywolf Qi Hunt
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