From: schwidefsky@de.ibm.com
To: Andi Kleen <ak@suse.de>
Cc: Mark Salisbury <mbs@mc.com>, Jeff Dike <jdike@karaya.com>,
linux-kernel@vger.kernel.org
Subject: Re: No 100 HZ timer !
Date: Tue, 10 Apr 2001 09:27:00 +0200 [thread overview]
Message-ID: <C1256A2A.0028E607.00@d12mta07.de.ibm.com> (raw)
>Just how would you do kernel/user CPU time accounting then ? It's
currently done
>on every timer tick, and doing it less often would make it useless.
This part is architecture dependent. For S/390 I choose to do a "STCK" on
every
system entry/exit. Dunno if this can be done on other architectures too, on
S/390
this is reasonably cheap (one STCK costs 15 cycles). That means the
kernel/user CPU
time accounting is MUCH better now.
blue skies,
Martin
Linux/390 Design & Development, IBM Deutschland Entwicklung GmbH
Schönaicherstr. 220, D-71032 Böblingen, Telefon: 49 - (0)7031 - 16-2247
E-Mail: schwidefsky@de.ibm.com
next reply other threads:[~2001-04-10 7:29 UTC|newest]
Thread overview: 118+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-10 7:27 schwidefsky [this message]
-- strict thread matches above, loose matches on Subject: below --
2001-08-01 17:22 No 100 HZ timer ! george anzinger
2001-08-01 19:34 ` 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 17:26 ` John Alvord
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
2001-04-09 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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