From: Jan Blunck <jblunck@suse.de>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ulrich Lukas <ulrich.lukas@gmx.de>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Steven Rostedt <rostedt@goodmis.org>,
linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
Clark Williams <williams@redhat.com>,
linux-rt-users@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>
Subject: Re: [PATCH 00/18] tracing/ring-buffer: fixes for latency tracer [2.6.32]
Date: Mon, 7 Sep 2009 12:41:55 +0200 [thread overview]
Message-ID: <20090907104155.GD28804@bolzano.suse.de> (raw)
In-Reply-To: <20090907102838.GA6393@nowhere>
[-- Attachment #1: Type: text/plain, Size: 1394 bytes --]
On Mon, Sep 07, Frederic Weisbecker wrote:
> On Mon, Sep 07, 2009 at 12:20:50PM +0200, Jan Blunck wrote:
> > On Sat, Sep 5, 2009 at 5:06 PM, Arnaldo Carvalho de Melo<acme@redhat.com> wrote:
> > >
> > > I did a quick port to tip/rt/head and couldn't reproduce the problems I
> > > was experiencing, thanks!
> > >
> > > I've put the ported patch series at:
> > >
> > > http://userweb.kernel.org/~acme/rostedt-rb-rt
> > >
> >
> > Nice, this also seems to fix my problem with the hanging wakup
> > selftest. At least the system continues to boot. However, I still get
> > this:
> >
> > [ 13.739115] Testing tracer sched_switch: PASSED
> > [ 14.002071] Testing tracer function: PASSED
> > [ 14.158816] Testing dynamic ftrace: PASSED
> > [ 14.512524] Testing tracer irqsoff: PASSED
> > [ 14.693519] Testing tracer preemptoff: PASSED
> > [ 14.853519] Testing tracer preemptirqsoff: PASSED
> > [ 15.013506] Testing tracer wakeup:
> > [ 15.134004] hrtimer: interrupt too slow, forcing clock min delta to
> > 27508383 ns
>
>
>
> Ah, Ulrich Lukas also reported me such warnings. I would like to
> track the reason of these messages (the hrtimer hanging detection
> seems to warn too early).
>
> Could you please send me your config, I hope I could reproduce it.
>
I only see that on one of my systems, a 32 core Opteron and not on my 8
core. So it seems that size does matter ...
[-- Attachment #2: hrtimer-slow.config --]
[-- Type: application/x-config, Size: 69312 bytes --]
next prev parent reply other threads:[~2009-09-07 10:41 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-04 23:55 [PATCH 00/18] tracing/ring-buffer: fixes for latency tracer [2.6.32] Steven Rostedt
2009-09-04 23:55 ` [PATCH 01/18] ring-buffer: do not reset while in a commit Steven Rostedt
2009-09-04 23:55 ` [PATCH 02/18] ring-buffer: do not swap buffers during " Steven Rostedt
2009-09-04 23:55 ` [PATCH 03/18] ring-buffer: remove unnecessary cpu_relax Steven Rostedt
2009-09-04 23:55 ` [PATCH 04/18] ring-buffer: fix ring_buffer_read crossing pages Steven Rostedt
2009-09-04 23:55 ` [PATCH 05/18] ring-buffer: remove ring_buffer_event_discard Steven Rostedt
2009-09-04 23:55 ` [PATCH 06/18] ring-buffer: do not count discarded events Steven Rostedt
2009-09-04 23:55 ` [PATCH 07/18] ring-buffer: disable all cpu buffers when one finds a problem Steven Rostedt
2009-09-04 23:55 ` [PATCH 08/18] tracing: print out start and stop in latency traces Steven Rostedt
2009-09-04 23:55 ` [PATCH 09/18] tracing: disable update max tracer while reading trace Steven Rostedt
2009-09-04 23:55 ` [PATCH 10/18] tracing: disable buffers and synchronize_sched before resetting Steven Rostedt
2009-09-04 23:55 ` [PATCH 11/18] tracing: remove users of tracing_reset Steven Rostedt
2009-09-04 23:55 ` [PATCH 12/18] tracing: use timestamp to determine start of latency traces Steven Rostedt
2009-09-04 23:55 ` [PATCH 13/18] tracing: make tracing_reset safe for external use Steven Rostedt
2009-09-04 23:55 ` [PATCH 14/18] tracing: pass around ring buffer instead of tracer Steven Rostedt
2009-09-04 23:55 ` [PATCH 15/18] tracing: add trace_array_printk for internal tracers to use Steven Rostedt
2009-09-04 23:55 ` [PATCH 16/18] tracing: report error in trace if we fail to swap latency buffer Steven Rostedt
2009-09-04 23:55 ` [PATCH 17/18] ring-buffer: check for swapped buffers in start of committing Steven Rostedt
2009-09-04 23:55 ` [PATCH 18/18] ring-buffer: only enable ring_buffer_swap_cpu when needed Steven Rostedt
2009-09-05 15:06 ` [PATCH 00/18] tracing/ring-buffer: fixes for latency tracer [2.6.32] Arnaldo Carvalho de Melo
2009-09-07 10:20 ` Jan Blunck
2009-09-07 10:20 ` Jan Blunck
2009-09-07 10:28 ` Frederic Weisbecker
2009-09-07 10:41 ` Jan Blunck [this message]
2009-09-07 11:22 ` Frederic Weisbecker
2009-09-08 14:42 ` Jan Blunck
2009-09-08 14:42 ` Jan Blunck
2009-09-08 15:39 ` Steven Rostedt
2009-09-08 15:39 ` Steven Rostedt
2009-09-06 4:19 ` Ingo Molnar
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