From: Lee Revell <rlrevell@joe-job.com>
To: Vojtech Pavlik <vojtech@suse.cz>
Cc: George Anzinger <george@mvista.com>,
Fernando Lopez-Lezcano <nando@ccrma.Stanford.EDU>,
Ingo Molnar <mingo@elte.hu>,
linux-kernel@vger.kernel.org,
"Paul E. McKenney" <paulmck@us.ibm.com>,
"K.R. Foley" <kr@cybsft.com>,
Steven Rostedt <rostedt@goodmis.org>,
Thomas Gleixner <tglx@linutronix.de>,
pluto@agmk.net, john cooper <john.cooper@timesys.com>,
Benedikt Spranger <bene@linutronix.de>,
Daniel Walker <dwalker@mvista.com>,
Tom Rini <trini@kernel.crashing.org>
Subject: Re: 2.6.14-rt13
Date: Sat, 19 Nov 2005 13:27:06 -0500 [thread overview]
Message-ID: <1132424827.6874.64.camel@mindpipe> (raw)
In-Reply-To: <20051119074503.GA12551@midnight.suse.cz>
On Sat, 2005-11-19 at 08:45 +0100, Vojtech Pavlik wrote:
> On Fri, Nov 18, 2005 at 06:28:24PM -0800, George Anzinger wrote:
> > Finding it is another matter. It does not have a fixed address (i.e.
> > it differs from machine to machine, but is constant on any given
> > machine). The boot code roots it out of an info block put in memory
> > by the BIOS. I suppose one could put a printk in the boot code to
> > disclose it...
>
> There is really no reason to do that, since the time to read it (~1200
> ns) is much less than the time to enter the kernel (less than 200 ns),
> so gettimeofday() is definitely easier to use and also doesn't overflow.
>
Thanks very much, you have answered my question. We would prefer
gettimeofday() anyway for portability, so if the plan is to make it
faster then we can deal with losing the TSC.
Lee
next prev parent reply other threads:[~2005-11-19 18:36 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-15 9:08 2.6.14-rt13 Ingo Molnar
2005-11-15 16:36 ` 2.6.14-rt13 Mark Knecht
2005-11-15 19:57 ` 2.6.14-rt13 Paul E. McKenney
2005-11-16 3:48 ` 2.6.14-rt13 K.R. Foley
2005-11-16 8:40 ` 2.6.14-rt13 Ingo Molnar
2005-11-16 17:02 ` 2.6.14-rt13 Paul E. McKenney
2005-11-18 18:02 ` 2.6.14-rt13 Fernando Lopez-Lezcano
2005-11-18 21:54 ` 2.6.14-rt13 Lee Revell
2005-11-18 22:05 ` 2.6.14-rt13 Fernando Lopez-Lezcano
2005-11-18 22:07 ` 2.6.14-rt13 Ingo Molnar
2005-11-18 22:15 ` 2.6.14-rt13 Lee Revell
2005-11-18 22:25 ` 2.6.14-rt13 Steven Rostedt
2005-11-18 23:36 ` 2.6.14-rt13 Fernando Lopez-Lezcano
2005-11-18 23:57 ` 2.6.14-rt13 Steven Rostedt
2005-11-18 22:41 ` 2.6.14-rt13 Fernando Lopez-Lezcano
2005-11-19 2:39 ` 2.6.14-rt13 Steven Rostedt
2005-11-24 15:07 ` 2.6.14-rt13 Ingo Molnar
2005-11-24 15:21 ` 2.6.14-rt13 Steven Rostedt
2005-11-25 20:56 ` [RFC][PATCH] Runtime switching to idle_poll (was: Re: 2.6.14-rt13) Steven Rostedt
2005-11-26 13:05 ` Ingo Molnar
2005-11-29 2:48 ` [RFC][PATCH] Runtime switching of the idle function [take 2] Steven Rostedt
2005-11-29 3:02 ` Andrew Morton
2005-11-29 3:42 ` Steven Rostedt
2005-11-29 4:01 ` Andrew Morton
2005-11-29 6:44 ` Ingo Molnar
2005-11-29 6:55 ` Nick Piggin
2005-11-29 18:05 ` Andi Kleen
2005-11-29 14:19 ` Steven Rostedt
2005-11-29 14:50 ` Andi Kleen
2005-11-29 15:42 ` Steven Rostedt
2005-12-02 1:27 ` Max Krasnyansky
2005-12-02 1:45 ` Andi Kleen
2005-12-03 2:17 ` Max Krasnyansky
2005-11-29 4:22 ` john stultz
2005-11-29 14:22 ` Steven Rostedt
2005-11-29 13:08 ` Pavel Machek
2005-12-18 15:26 ` Steven Rostedt
2005-11-18 22:13 ` 2.6.14-rt13 Lee Revell
2005-11-18 22:32 ` 2.6.14-rt13 Vojtech Pavlik
2005-11-19 2:28 ` 2.6.14-rt13 George Anzinger
2005-11-19 7:45 ` 2.6.14-rt13 Vojtech Pavlik
2005-11-19 18:27 ` Lee Revell [this message]
2005-11-21 21:32 ` 2.6.14-rt13 Fernando Lopez-Lezcano
2005-11-21 21:41 ` 2.6.14-rt13 john stultz
[not found] ` <20051121221511.GA7255@elte.hu>
2005-11-21 22:19 ` test time-warps [was: Re: 2.6.14-rt13] Ingo Molnar
2005-11-21 23:08 ` Fernando Lopez-Lezcano
2005-11-21 23:38 ` Fernando Lopez-Lezcano
2005-11-21 23:41 ` john stultz
2005-11-22 1:31 ` Lee Revell
2005-11-22 1:15 ` Steven Rostedt
2005-11-22 11:16 ` Ingo Molnar
2005-11-22 17:49 ` Fernando Lopez-Lezcano
2005-11-22 18:01 ` Christopher Friesen
2005-11-22 18:22 ` Steven Rostedt
2005-11-22 20:52 ` Ingo Molnar
2005-11-22 11:19 ` 2.6.14-rt13 Ingo Molnar
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