From: george anzinger <george@mvista.com>
To: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: No 100 HZ timer !
Date: Wed, 01 Aug 2001 10:22:12 -0700 [thread overview]
Message-ID: <3B683AC4.E0F2BF9E@mvista.com> (raw)
I have just posted a patch on sourceforge:
http://sourceforge.net/projects/high-res-timers
to the 2.4.7 kernel with both ticked and tick less options, switch able
at any time via a /proc interface. The system is instrumented with
Andrew Mortons time pegs with a couple of enhancements so you can easily
see your clock/ timer overhead (thanks Andrew).
Please take a look at this system and let me know if a tick less system
is worth further effort.
The testing I have done seems to indicate a lower overhead on a lightly
loaded system, about the same overhead with some load, and much more
overhead with a heavy load. To me this seems like the wrong thing to
do. We would like as nearly a flat overhead to load curve as we can get
and the ticked system seems to be much better in this regard. Still
there may be applications where this works.
comments? RESULTS?
George
next reply other threads:[~2001-08-01 17:22 UTC|newest]
Thread overview: 119+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-08-01 17:22 george anzinger [this message]
2001-08-01 19:34 ` No 100 HZ timer ! Chris Friesen
2001-08-01 19:49 ` Richard B. Johnson
2001-08-01 20:08 ` Mark Salisbury
2001-08-01 20:33 ` george anzinger
2001-08-01 21:20 ` george anzinger
2001-08-02 4:28 ` Rik van Riel
2001-08-02 6:03 ` george anzinger
2001-08-02 14:39 ` Oliver Xymoron
2001-08-02 16:36 ` george anzinger
2001-08-02 17:05 ` Oliver Xymoron
2001-08-02 17:46 ` george anzinger
2001-08-02 18:41 ` Oliver Xymoron
2001-08-02 21:18 ` george anzinger
2001-08-02 22:09 ` Oliver Xymoron
2001-08-02 22:47 ` No 100 HZ timer ! & the tq_timer george anzinger
2001-08-02 17:26 ` No 100 HZ timer ! John Alvord
-- strict thread matches above, loose matches on Subject: below --
2001-04-12 13:14 No 100 HZ timer! Bret Indrelee
2001-04-12 12:58 No 100 HZ timer ! Mark Salisbury
2001-04-11 17:56 No 100 HZ timer! Bret Indrelee
2001-04-12 17:39 ` george anzinger
2001-04-12 21:19 ` Bret Indrelee
2001-04-12 22:20 ` george anzinger
2001-04-13 4:00 ` Bret Indrelee
2001-04-13 6:32 ` Ben Greear
2001-04-13 8:42 ` george anzinger
2001-04-13 10:36 ` Jamie Lokier
2001-04-13 16:07 ` george anzinger
2001-04-13 23:00 ` Jamie Lokier
2001-04-13 12:05 ` Horst von Brand
2001-04-13 21:53 ` george anzinger
2001-04-13 23:10 ` Jamie Lokier
2001-04-16 3:02 ` Ben Greear
2001-04-16 2:46 ` Jamie Lokier
2001-04-16 12:36 ` Mark Salisbury
2001-04-16 19:19 ` george anzinger
2001-04-16 20:45 ` Albert D. Cahalan
2001-04-16 21:29 ` Chris Wedgwood
2001-04-16 22:25 ` george anzinger
2001-04-16 23:57 ` Mark Salisbury
2001-04-17 0:45 ` george anzinger
2001-04-17 12:12 ` Mark Salisbury
2001-04-17 12:51 ` Mark Salisbury
2001-04-17 18:53 ` george anzinger
2001-04-17 19:41 ` Jamie Lokier
2001-04-23 8:05 ` Ulrich Windl
2001-04-23 13:22 ` Mark Salisbury
2001-04-16 2:41 ` Ben Greear
2001-04-11 9:06 No 100 HZ timer ! schwidefsky
2001-04-10 14:42 schwidefsky
2001-04-10 12:54 schwidefsky
2001-04-10 11:38 schwidefsky
2001-04-10 11:54 ` Alan Cox
2001-04-10 7:29 schwidefsky
2001-04-10 7:27 schwidefsky
2001-04-09 15:54 schwidefsky
2001-04-09 18:30 ` Jeff Dike
2001-04-09 18:19 ` Mark Salisbury
2001-04-09 20:12 ` Alan Cox
2001-04-09 20:32 ` Mark Salisbury
2001-04-09 22:31 ` Mikulas Patocka
2001-04-09 22:35 ` Alan Cox
2001-04-10 11:43 ` David Schleef
2001-04-10 12:04 ` Mikulas Patocka
2001-04-10 12:31 ` David Schleef
2001-04-10 12:34 ` Mark Salisbury
2001-04-10 14:10 ` Mikulas Patocka
2001-04-10 13:35 ` root
2001-04-10 14:22 ` Andi Kleen
2001-04-10 15:43 ` Alan Cox
2001-04-12 5:25 ` watermodem
2001-04-12 8:45 ` Jamie Lokier
2001-04-10 17:15 ` Jamie Lokier
2001-04-10 17:27 ` Alan Cox
2001-04-10 17:35 ` Jamie Lokier
2001-04-10 18:17 ` Alan Cox
2001-04-10 18:24 ` Jamie Lokier
2001-04-10 19:28 ` george anzinger
2001-04-10 20:02 ` mark salisbury
2001-04-10 22:08 ` george anzinger
2001-04-11 0:48 ` Mark Salisbury
2001-04-11 2:35 ` george anzinger
2001-04-12 0:24 ` Mark Salisbury
2001-04-11 16:11 ` Jamie Lokier
2001-04-11 16:59 ` george anzinger
2001-04-11 18:57 ` Jamie Lokier
2001-04-11 19:21 ` John Alvord
2001-04-12 8:41 ` Jamie Lokier
2001-08-01 1:08 ` george anzinger
2001-08-11 11:57 ` Pavel Machek
2001-08-14 15:59 ` Jamie Lokier
2001-08-14 16:57 ` george anzinger
2001-04-10 19:50 ` Zdenek Kabelac
2001-04-11 11:42 ` Maciej W. Rozycki
2001-04-11 16:13 ` Jamie Lokier
2001-04-12 9:51 ` Maciej W. Rozycki
2001-04-10 19:42 ` Zdenek Kabelac
2001-04-10 12:19 ` Mark Salisbury
2001-04-10 17:51 ` yodaiken
2001-04-11 18:43 ` Oliver Xymoron
2001-04-10 12:11 ` Mark Salisbury
2001-04-10 5:51 ` Andi Kleen
2001-04-10 9:33 ` Martin Mares
2001-04-10 10:00 ` Albert D. Cahalan
2001-04-10 12:14 ` Mark Salisbury
2001-04-11 5:55 ` Karim Yaghmour
2001-04-10 11:18 ` Alan Cox
2001-04-10 12:02 ` Andi Kleen
2001-04-10 12:12 ` Alan Cox
2001-04-10 12:27 ` Mark Salisbury
2001-04-10 12:32 ` Andi Kleen
2001-04-10 12:36 ` Alan Cox
2001-04-10 12:37 ` Andi Kleen
2001-04-10 18:45 ` Stephen D. Williams
2001-04-10 19:59 ` Andi Kleen
2001-04-10 12:07 ` Mark Salisbury
2001-04-10 12:45 ` Andi Kleen
2001-04-10 12:42 ` Mark Salisbury
2001-04-10 12:54 ` Andi Kleen
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