From: Andrew Morton <akpm@linux-foundation.org>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Andi Kleen <ak@novell.com>, Daniel Walker <dwalker@mvista.com>,
linux-kernel@vger.kernel.org, johnstul@us.ibm.com,
tglx@linutronix.de
Subject: Re: [PATCH] i386 tsc: remove xtime_lock'ing around cpufreq notifier
Date: Thu, 12 Apr 2007 10:55:59 -0700 [thread overview]
Message-ID: <20070412105559.385789dd.akpm@linux-foundation.org> (raw)
In-Reply-To: <461E6FA7.5080605@goop.org>
On Thu, 12 Apr 2007 10:43:03 -0700
Jeremy Fitzhardinge <jeremy@goop.org> wrote:
> Andrew Morton wrote:
> > hm. People (ab)use sched_clock() for all sorts of things nowadays. I wouldn't
> > do anything to degrade it just on behalf of printk-timestamping.
> >
>
> printk was the only non-scheduler-ish use I could find. Are there others?
>
blktrace. I've seen a couple of trace/debug-style things which use
sched_clock for timestamping event collection. I think lttng does exotic
things with TSCs, performing private skew correction, although that might
have changed now.
next prev parent reply other threads:[~2007-04-12 17:57 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-11 16:29 [PATCH] i386 tsc: remove xtime_lock'ing around cpufreq notifier Daniel Walker
2007-04-11 20:31 ` Andrew Morton
2007-04-11 20:54 ` Daniel Walker
2007-04-11 21:33 ` Andrew Morton
2007-04-12 0:39 ` Andrew Morton
2007-04-12 9:36 ` Andi Kleen
2007-04-12 16:23 ` Andrew Morton
2007-04-12 16:45 ` Andi Kleen
2007-04-12 17:00 ` Andrew Morton
2007-04-12 17:43 ` Jeremy Fitzhardinge
2007-04-12 17:46 ` Andi Kleen
2007-04-12 17:52 ` Daniel Walker
2007-04-12 17:55 ` Andrew Morton [this message]
2007-04-12 18:27 ` Andi Kleen
2007-04-12 19:41 ` Jeremy Fitzhardinge
2007-04-12 19:43 ` Jeremy Fitzhardinge
2007-04-12 17:41 ` Jeremy Fitzhardinge
2007-04-12 17:45 ` Andi Kleen
2007-04-12 19:46 ` Jeremy Fitzhardinge
2007-04-12 20:15 ` Andi Kleen
2007-04-12 17:17 ` Andi Kleen
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