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From: Christoph Lameter <clameter@engr.sgi.com>
To: tglx@linutronix.de
Cc: linux-kernel@vger.kernel.org, mingo@elte.hu, akpm@osdl.org,
	george@mvista.com, johnstul@us.ibm.com, paulmck@us.ibm.com
Subject: Re: [ANNOUNCE] ktimers subsystem
Date: Mon, 19 Sep 2005 15:03:58 -0700 (PDT)	[thread overview]
Message-ID: <Pine.LNX.4.62.0509191500040.27238@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <20050919184834.1.patchmail@tglx.tec.linutronix.de>

On Mon, 19 Sep 2005 tglx@linutronix.de wrote:

> sources. Another astonishing implementation detail of the current time 
> keeping is the fact that we get the monotonic clock (defined by POSIX as 
> a continous clock source which can not be set) by subtracting a variable 
> offset from the real time clock, which can be set by the user and 
> corrected by NTP or other mechanisms.

The benefit or drawback of that implementation depends which time is more 
important: realtime or monotonic time. I think the most used time value is 
realtime and not monotonic time. Having the real time value in xtime 
saves one addition when retrieving realtime. 

  parent reply	other threads:[~2005-09-19 22:04 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-09-19 16:48 [ANNOUNCE] ktimers subsystem tglx
2005-09-19 16:48 ` [PATCH] " tglx
2005-09-19 21:47 ` [ANNOUNCE] " Thomas Gleixner
2005-09-19 22:03 ` Christoph Lameter [this message]
2005-09-19 22:17   ` Thomas Gleixner
2005-09-19 22:24     ` Christoph Lameter
2005-09-19 22:44       ` Thomas Gleixner
2005-09-19 22:50         ` john stultz
2005-09-19 22:58           ` Thomas Gleixner
2005-09-19 23:04         ` Christoph Lameter
2005-09-19 23:12           ` Thomas Gleixner
2005-09-20  7:14             ` Ingo Molnar
2005-09-20  7:10       ` Ingo Molnar
2005-09-21 19:24       ` Pavel Machek
2005-09-19 22:39     ` Christopher Friesen
2005-09-19 22:54       ` Thomas Gleixner
2005-09-20  4:57         ` Christopher Friesen
2005-09-20  5:11           ` Thomas Gleixner
2005-09-20  0:43   ` George Anzinger
2005-09-21 19:50 ` Roman Zippel
2005-09-21 22:41   ` Thomas Gleixner
2005-09-22 12:59     ` Ingo Molnar
2005-09-22 23:09     ` Roman Zippel
2005-09-22 23:31       ` Christopher Friesen
2005-09-23  0:25         ` Roman Zippel
2005-09-23  6:49           ` Thomas Gleixner
2005-09-24  3:15             ` Roman Zippel
2005-09-24  5:16               ` Ingo Molnar
2005-09-24 10:35                 ` Roman Zippel
2005-09-24 13:56                   ` Thomas Gleixner
2005-09-24 16:51                     ` Daniel Walker
2005-09-24 23:45                     ` Roman Zippel
2005-09-25 21:00                       ` Thomas Gleixner
2005-09-27 16:54                         ` Roman Zippel
2005-09-27 19:03                           ` Tim Bird
2005-09-28 16:36                             ` Roman Zippel
2005-09-25 21:02                       ` Thomas Gleixner
2005-09-27 16:48                         ` Roman Zippel
2005-09-27 18:38                           ` Tim Bird
2005-09-27 20:36                             ` George Anzinger
2005-09-23  2:25       ` john stultz
2005-09-23  8:27       ` Thomas Gleixner
2005-09-24  2:43         ` Roman Zippel
2005-09-24  5:03           ` Ingo Molnar
2005-09-24  9:04           ` James Bruce
2005-09-23 15:21       ` Paul E. McKenney
2005-09-24  3:38         ` Roman Zippel
2005-09-25 15:48 Sid Boyce
2005-09-25 18:20 ` Zwane Mwaikambo
2005-09-26  0:02   ` Sid Boyce

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