From: Ingo Molnar <mingo@elte.hu>
To: Len Brown <lenb@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>,
LKML <linux-kernel@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
john stultz <johnstul@us.ibm.com>
Subject: Re: regression in TSC unstable?
Date: Fri, 8 May 2009 14:07:40 +0200 [thread overview]
Message-ID: <20090508120740.GB18758@elte.hu> (raw)
In-Reply-To: <alpine.LFD.2.00.0905080117410.4710@localhost.localdomain>
* Len Brown <lenb@kernel.org> wrote:
> On Fri, 8 May 2009, Steven Rostedt wrote:
>
> > The ring-buffer-benchmark module creates a producer and consumer and loops
> > on do_gettimeofday until it hits about 10 seconds. Then it calculates the
> > number of events recorded / time running.
> >
> > After Ingo merged Linus's latest
>
> merged what into what?
> are you referring to the upstream kernel or something else?
he's describing how he found it: a not-yet-upstream kernel-benchmark
module showed a performance regression that came in via upstream.
The regression is upstream too, just harder to notice.
Ingo
next prev parent reply other threads:[~2009-05-08 12:08 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-08 4:14 Steven Rostedt
2009-05-08 5:21 ` Len Brown
2009-05-08 12:07 ` Ingo Molnar [this message]
2009-05-11 0:26 ` Regression in TSC unstable -- confirmed Frans Pop
2009-05-11 14:22 ` [PATCH] ACPI: do not mark TSC unstable for invalid C-states Thomas Gleixner
2009-05-11 15:00 ` Steven Rostedt
2009-05-11 15:03 ` Frans Pop
2009-05-11 16:43 ` Janne Kulmala
2009-05-14 19:46 ` Len Brown
2009-05-14 20:09 ` Len Brown
2009-05-14 20:19 ` Thomas Gleixner
2009-05-14 21:55 ` [PATCH] ACPI: idle: fix init-time TSC check regression Len Brown
2009-05-14 22:27 ` Thomas Gleixner
2009-05-15 3:36 ` Len Brown
2009-05-14 22:31 ` Frans Pop
2009-05-15 5:40 ` [PATCH] ACPI: Idle C-states disabled by max_cstate should not disable the TSC Len Brown
2009-05-15 6:18 ` [PATCH] ACPI: idle: rename lapic timer workaround routines Len Brown
2009-05-15 8:28 ` Thomas Gleixner
2009-05-15 8:27 ` [PATCH] ACPI: Idle C-states disabled by max_cstate should not disable the TSC Thomas Gleixner
2009-05-15 10:57 ` [PATCH] ACPI: idle: fix init-time TSC check regression Frans Pop
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