From: Ingo Molnar <mingo@elte.hu>
To: Daniel Walker <dwalker@mvista.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>,
Steven Rostedt <rostedt@goodmis.org>,
linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Jason Baron <jbaron@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH 3/5] lockstat: core infrastructure
Date: Fri, 1 Jun 2007 15:12:49 +0200 [thread overview]
Message-ID: <20070601131249.GA17059@elte.hu> (raw)
In-Reply-To: <1180545913.32594.194.camel@imap.mvista.com>
* Daniel Walker <dwalker@mvista.com> wrote:
> On Wed, 2007-05-30 at 19:16 +0200, Peter Zijlstra wrote:
> > I think you are mistaken here; the two are similar but not
> > identical.
> >
> > I see sched_clock() as fast first, accurate second. Whereas the
> > clocksource thing is accurate first, fast second.
>
> This is true .. However, if there is a speed different it's small.
Ugh. Have you ever compared pmtimer (or even hpet) against TSC based
sched_clock()? What you write is so wrong that it's not even funny. You
keep repeating this nonsense despite having been told multiple times
that you are dead wrong.
Ingo
next prev parent reply other threads:[~2007-06-01 13:13 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-29 12:52 [PATCH 0/5] lock contention tracking -v3 Peter Zijlstra
2007-05-29 12:52 ` [PATCH 1/5] fix raw_spinlock_t vs lockdep Peter Zijlstra
2007-05-29 12:52 ` [PATCH 2/5] lockdep: sanitise CONFIG_PROVE_LOCKING Peter Zijlstra
2007-05-29 13:21 ` Christoph Hellwig
2007-05-29 14:16 ` Ingo Molnar
2007-05-30 3:14 ` Andrew Morton
2007-05-29 12:52 ` [PATCH 3/5] lockstat: core infrastructure Peter Zijlstra
2007-05-29 20:28 ` Daniel Walker
2007-05-30 13:03 ` Peter Zijlstra
2007-05-30 13:24 ` Ingo Molnar
2007-05-30 13:40 ` Steven Rostedt
2007-05-30 13:49 ` Ingo Molnar
2007-05-30 17:06 ` Daniel Walker
2007-05-30 17:16 ` Peter Zijlstra
2007-05-30 17:25 ` Daniel Walker
2007-06-01 13:12 ` Ingo Molnar [this message]
2007-06-01 15:26 ` Daniel Walker
2007-06-01 15:52 ` Peter Zijlstra
2007-06-01 16:11 ` Daniel Walker
2007-06-01 18:30 ` Ingo Molnar
2007-06-01 19:25 ` Matt Mackall
2007-06-01 19:30 ` Daniel Walker
2007-06-01 18:43 ` Peter Zijlstra
2007-06-01 18:51 ` Ingo Molnar
2007-06-01 19:30 ` Daniel Walker
2007-06-01 18:19 ` Ingo Molnar
2007-06-01 19:30 ` Daniel Walker
2007-06-01 14:25 ` Andi Kleen
2007-05-30 15:20 ` Daniel Walker
2007-05-30 3:43 ` Andrew Morton
2007-05-29 12:52 ` [PATCH 4/5] lockstat: human readability tweaks Peter Zijlstra
2007-05-29 12:52 ` [PATCH 5/5] lockstat: hook into spinlock_t, rwlock_t, rwsem and mutex Peter Zijlstra
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