From: Martin Bligh <mbligh@mbligh.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: Roman Zippel <zippel@linux-m68k.org>,
Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>,
linux-kernel@vger.kernel.org,
Christoph Hellwig <hch@infradead.org>,
Andrew Morton <akpm@osdl.org>, Ingo Molnar <mingo@redhat.com>,
Greg Kroah-Hartman <gregkh@suse.de>,
Thomas Gleixner <tglx@linutronix.de>,
Tom Zanussi <zanussi@us.ibm.com>,
ltt-dev@shafik.org, Michel Dagenais <michel.dagenais@polymtl.ca>
Subject: Re: [PATCH 0/11] LTTng-core (basic tracing infrastructure) 0.5.108
Date: Thu, 14 Sep 2006 13:25:56 -0700 [thread overview]
Message-ID: <4509BAD4.8010206@mbligh.org> (raw)
In-Reply-To: <20060914171320.GB1105@elte.hu>
> if there are lots of tracepoints (and the union of _all_ useful
> tracepoints that i ever encountered in my life goes into the thousands)
> then the overhead is not zero at all.
>
> also, the other disadvantages i listed very much count too. Static
> tracepoints are fundamentally limited because:
>
> - they can only be added at the source code level
>
> - modifying them requires a reboot which is not practical in a
> production environment
>
> - there can only be a limited set of them, while many problems need
> finegrained tracepoints tailored to the problem at hand
>
> - conditional tracepoints are typically either nonexistent or very
> limited.
>
> for me these are all _independent_ grounds for rejection, as a generic
> kernel infrastructure.
I don't think anyone is saying that static tracepoints do not have their
limitations, or that dynamic tracepointing is useless. But that's not
the point ... why can't we have one infrastructure that supports both?
Preferably in a fairly simple, consistent way.
M.
next prev parent reply other threads:[~2006-09-14 20:25 UTC|newest]
Thread overview: 284+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-14 3:38 [PATCH 0/11] LTTng-core (basic tracing infrastructure) 0.5.108 Mathieu Desnoyers
2006-09-14 11:27 ` Ingo Molnar
2006-09-14 13:40 ` Roman Zippel
2006-09-14 13:55 ` Ingo Molnar
2006-09-14 14:33 ` Roman Zippel
2006-09-14 15:26 ` Michel Dagenais
2006-09-14 17:48 ` Ingo Molnar
2006-09-15 15:04 ` Mathieu Desnoyers
2006-09-14 18:08 ` Nick Piggin
2006-09-14 18:38 ` Karim Yaghmour
2006-09-14 17:13 ` Ingo Molnar
2006-09-14 17:55 ` Roman Zippel
2006-09-14 18:15 ` Ingo Molnar
2006-09-14 18:35 ` Mathieu Desnoyers
2006-09-14 18:54 ` Karim Yaghmour
2006-09-15 9:20 ` Jes Sorensen
2006-09-15 12:38 ` Karim Yaghmour
2006-09-15 12:32 ` Jes Sorensen
2006-09-15 14:09 ` Karim Yaghmour
2006-09-15 14:30 ` Jes Sorensen
2006-09-15 15:12 ` Karim Yaghmour
2006-09-16 10:41 ` Jes Sorensen
2006-09-16 15:28 ` Karim Yaghmour
2006-09-18 8:57 ` Jes Sorensen
2006-09-18 14:48 ` Ingo Molnar
2006-09-18 15:37 ` Karim Yaghmour
2006-09-15 13:20 ` Paul Mundt
2006-09-15 13:41 ` Roman Zippel
2006-09-15 13:44 ` Jes Sorensen
2006-09-15 14:03 ` Roman Zippel
2006-09-15 14:37 ` Alan Cox
2006-09-15 14:34 ` Roman Zippel
2006-09-15 13:57 ` Paul Mundt
2006-09-15 14:17 ` Karim Yaghmour
2006-09-15 14:13 ` Jes Sorensen
2006-09-15 14:31 ` Karim Yaghmour
2006-09-15 14:28 ` Paul Mundt
2006-09-15 14:46 ` Martin J. Bligh
2006-09-15 15:22 ` Alan Cox
2006-09-15 15:47 ` Martin J. Bligh
2006-09-15 14:51 ` Karim Yaghmour
2006-09-15 15:00 ` Thomas Gleixner
2006-09-15 15:28 ` Karim Yaghmour
2006-09-15 18:16 ` Andrew Morton
2006-09-15 18:19 ` Ingo Molnar
2006-09-15 19:26 ` Karim Yaghmour
2006-09-15 19:43 ` Roman Zippel
2006-09-15 20:05 ` Ingo Molnar
2006-09-15 20:22 ` Mathieu Desnoyers
2006-09-15 21:08 ` Jose R. Santos
2006-09-15 21:25 ` Mathieu Desnoyers
2006-09-15 22:02 ` Jose R. Santos
2006-09-15 22:03 ` Ingo Molnar
2006-09-15 22:32 ` Karim Yaghmour
2006-09-15 22:43 ` Ingo Molnar
2006-09-15 23:33 ` Karim Yaghmour
2006-09-15 23:52 ` Ingo Molnar
2006-09-16 2:24 ` Karim Yaghmour
2006-09-15 23:53 ` Ingo Molnar
2006-09-16 2:51 ` Karim Yaghmour
2006-09-15 22:59 ` Frank Ch. Eigler
2006-09-15 23:40 ` Karim Yaghmour
2006-09-15 23:17 ` Jose R. Santos
2006-09-15 21:32 ` Ingo Molnar
2006-09-15 21:58 ` Mathieu Desnoyers
2006-09-15 22:19 ` Ingo Molnar
2006-09-15 22:45 ` Karim Yaghmour
2006-09-16 9:59 ` Jes Sorensen
2006-09-16 17:24 ` Mathieu Desnoyers
2006-09-16 17:35 ` Ingo Molnar
2006-09-16 17:56 ` Mathieu Desnoyers
2006-09-16 19:10 ` Ingo Molnar
2006-09-16 19:37 ` Ingo Molnar
2006-09-16 20:29 ` [patch] kprobes: optimize branch placement Ingo Molnar
2006-09-16 20:43 ` Ingo Molnar
2006-09-16 21:44 ` Karim Yaghmour
2006-09-16 22:57 ` Andrew Morton
2006-09-16 23:24 ` Ingo Molnar
2006-09-17 2:44 ` Karim Yaghmour
2006-09-17 1:59 ` Karim Yaghmour
2006-09-17 12:15 ` Mike Galbraith
2006-09-16 22:56 ` Andrew Morton
2006-09-16 23:30 ` Ingo Molnar
2006-09-18 13:52 ` Ananth N Mavinakayanahalli
2006-09-16 22:55 ` Andrew Morton
2006-09-17 10:13 ` [PATCH 0/11] LTTng-core (basic tracing infrastructure) 0.5.108 Frederik Deweerdt
2006-09-17 14:00 ` Ingo Molnar
2006-09-16 19:51 ` Karim Yaghmour
2006-09-16 23:40 ` Ingo Molnar
2006-09-17 5:33 ` Mathieu Desnoyers
2006-09-16 18:11 ` Karim Yaghmour
2006-09-16 17:44 ` Ingo Molnar
2006-09-16 18:15 ` Karim Yaghmour
2006-09-18 8:18 ` Jes Sorensen
2006-09-16 17:55 ` Karim Yaghmour
2006-09-18 8:21 ` Jes Sorensen
2006-09-18 8:33 ` Jes Sorensen
2006-09-18 15:01 ` Mathieu Desnoyers
2006-09-16 17:30 ` Mathieu Desnoyers
2006-09-18 8:15 ` Jes Sorensen
2006-09-18 14:53 ` Mathieu Desnoyers
2006-09-18 15:17 ` Ingo Molnar
2006-09-18 16:54 ` Mathieu Desnoyers
2006-09-15 21:12 ` Roman Zippel
2006-09-15 21:08 ` Ingo Molnar
2006-09-15 20:13 ` Andrew Morton
2006-09-15 21:49 ` Jose R. Santos
2006-09-16 10:19 ` Jes Sorensen
2006-09-16 16:05 ` Karim Yaghmour
2006-09-17 4:54 ` Ganesan Rajagopal
2006-09-18 8:13 ` Jes Sorensen
2006-09-18 14:46 ` Mathieu Desnoyers
2006-09-18 17:06 ` Martin Bligh
2006-09-20 14:17 ` Jes Sorensen
2006-09-15 19:35 ` Thomas Gleixner
2006-09-15 19:40 ` Ingo Molnar
2006-09-15 19:56 ` Karim Yaghmour
2006-09-15 20:23 ` Thomas Gleixner
2006-09-15 20:40 ` Roman Zippel
2006-09-15 20:48 ` Ingo Molnar
2006-09-15 21:17 ` Karim Yaghmour
2006-09-15 21:15 ` Ingo Molnar
2006-09-15 21:56 ` Karim Yaghmour
2006-09-15 21:27 ` Roman Zippel
2006-09-15 21:51 ` Ingo Molnar
2006-09-15 22:15 ` Karim Yaghmour
2006-09-15 22:53 ` Roman Zippel
2006-09-15 23:14 ` Ingo Molnar
2006-09-15 23:49 ` Nicholas Miell
2006-09-15 23:57 ` Ingo Molnar
2006-09-16 0:41 ` Nicholas Miell
2006-09-16 0:31 ` Roman Zippel
2006-09-16 8:20 ` Ingo Molnar
2006-09-16 8:21 ` Ingo Molnar
2006-09-16 8:21 ` Ingo Molnar
2006-09-16 8:22 ` Ingo Molnar
2006-09-16 19:58 ` Roman Zippel
2006-09-16 22:50 ` Ingo Molnar
2006-09-16 23:00 ` Ingo Molnar
2006-09-17 1:15 ` Roman Zippel
2006-09-17 8:42 ` Ingo Molnar
2006-09-17 15:16 ` Roman Zippel
2006-09-17 15:25 ` Ingo Molnar
2006-09-17 16:02 ` Roman Zippel
2006-09-17 16:45 ` Ingo Molnar
2006-09-17 16:59 ` Nick Piggin
2006-09-17 17:26 ` Roman Zippel
2006-09-17 17:56 ` Nick Piggin
2006-09-17 18:59 ` Roman Zippel
2006-09-17 21:23 ` Ingo Molnar
2006-09-17 21:52 ` Roman Zippel
2006-09-17 22:27 ` Ingo Molnar
2006-09-17 21:40 ` Ingo Molnar
2006-09-18 8:43 ` Jes Sorensen
2006-09-17 21:32 ` Ingo Molnar
2006-09-17 19:23 ` Ingo Molnar
2006-09-17 19:45 ` Roman Zippel
2006-09-17 20:56 ` Ingo Molnar
2006-09-17 21:36 ` Roman Zippel
2006-09-17 22:13 ` Ingo Molnar
2006-09-16 23:14 ` Ingo Molnar
2006-09-17 14:19 ` Frank Ch. Eigler
2006-09-17 15:31 ` Ingo Molnar
2006-09-17 17:15 ` Mathieu Desnoyers
[not found] ` <y0mu036eglz.fsf@ton.toronto.redhat.com>
2006-09-17 15:00 ` Ingo Molnar
2006-09-16 8:23 ` Ingo Molnar
2006-09-16 8:23 ` Ingo Molnar
2006-09-16 8:23 ` Ingo Molnar
2006-09-15 21:05 ` Karim Yaghmour
2006-09-15 21:17 ` Thomas Gleixner
2006-09-15 21:31 ` Karim Yaghmour
2006-09-15 20:00 ` Mathieu Desnoyers
2006-09-15 20:27 ` Jose R. Santos
2006-09-15 20:37 ` Alan Cox
2006-09-15 20:26 ` Mathieu Desnoyers
2006-09-15 20:51 ` Karim Yaghmour
2006-09-17 17:53 ` Mathieu Desnoyers
2006-09-17 19:35 ` printk instrumentation with LTTng Mathieu Desnoyers
2006-09-15 15:24 ` [PATCH 0/11] LTTng-core (basic tracing infrastructure) 0.5.108 Alan Cox
2006-09-15 15:23 ` Karim Yaghmour
2006-09-15 14:39 ` Jes Sorensen
2006-09-15 15:04 ` Karim Yaghmour
2006-09-14 19:40 ` Tim Bird
2006-09-14 20:00 ` Ingo Molnar
2006-09-14 20:46 ` Karim Yaghmour
2006-09-19 12:05 ` Christoph Hellwig
2006-09-14 21:02 ` Roman Zippel
2006-09-15 11:40 ` Alan Cox
2006-09-15 11:46 ` Roman Zippel
2006-09-15 12:38 ` Alan Cox
2006-09-15 12:39 ` Roman Zippel
2006-09-15 13:41 ` Alan Cox
2006-09-15 13:34 ` Roman Zippel
2006-09-15 14:41 ` Alan Cox
2006-09-15 14:35 ` Karim Yaghmour
2006-09-15 14:58 ` Alan Cox
2006-09-15 14:57 ` Karim Yaghmour
2006-09-15 17:49 ` Andrew Morton
2006-09-15 18:20 ` Karim Yaghmour
2006-09-15 17:01 ` Tim Bird
2006-09-15 17:08 ` Frank Ch. Eigler
2006-09-15 17:57 ` Andrew Morton
2006-09-15 18:31 ` Alan Cox
2006-09-15 18:12 ` Ingo Molnar
2006-09-15 19:10 ` Roman Zippel
2006-09-15 19:10 ` Ingo Molnar
2006-09-15 20:05 ` Thomas Gleixner
2006-09-15 20:35 ` Roman Zippel
2006-09-15 21:44 ` Tim Bird
2006-09-19 12:29 ` Christoph Hellwig
2006-09-19 13:17 ` Roman Zippel
2006-09-15 18:24 ` Frank Ch. Eigler
2006-09-15 18:23 ` Ingo Molnar
2006-09-15 18:18 ` Martin Bligh
2006-09-15 18:10 ` Jose R. Santos
2006-09-15 19:49 ` Mathieu Desnoyers
2006-09-15 20:54 ` Jose R. Santos
2006-09-15 21:42 ` Karim Yaghmour
2006-09-15 21:46 ` Mathieu Desnoyers
2006-09-19 15:05 ` Jose R. Santos
2006-09-19 15:30 ` Mathieu Desnoyers
2006-09-19 16:39 ` Jose R. Santos
2006-09-19 18:03 ` Mathieu Desnoyers
2006-09-15 17:45 ` Andrew Morton
2006-09-15 18:16 ` Karim Yaghmour
2006-09-15 19:20 ` Jose R. Santos
2006-09-15 19:59 ` Andrew Morton
2006-09-15 20:24 ` Karim Yaghmour
2006-09-15 20:25 ` Thomas Gleixner
2006-09-14 19:47 ` Roman Zippel
2006-09-14 20:24 ` Ingo Molnar
2006-09-14 20:54 ` Roman Zippel
2006-09-14 21:08 ` Daniel Walker
2006-09-14 21:30 ` Roman Zippel
2006-09-14 22:15 ` Ingo Molnar
2006-09-14 23:39 ` Roman Zippel
2006-09-14 23:43 ` Ingo Molnar
2006-09-15 0:27 ` Roman Zippel
2006-09-15 1:47 ` Mathieu Desnoyers
2006-09-15 5:47 ` Vara Prasad
2006-09-14 18:12 ` Karim Yaghmour
2006-09-14 20:25 ` Martin Bligh [this message]
2006-09-14 20:34 ` Ingo Molnar
2006-09-14 20:55 ` Martin Bligh
2006-09-14 21:31 ` Ingo Molnar
2006-09-14 22:25 ` Martin Bligh
2006-09-14 22:36 ` Ingo Molnar
2006-09-14 22:59 ` Martin Bligh
2006-09-14 23:19 ` Ingo Molnar
2006-09-15 0:19 ` Nicholas Miell
2006-09-15 1:04 ` Martin J. Bligh
2006-09-15 12:38 ` Ingo Molnar
2006-09-15 7:00 ` Vara Prasad
2006-09-15 15:37 ` Michel Dagenais
2006-09-19 12:08 ` Christoph Hellwig
2006-09-14 21:07 ` Roman Zippel
2006-09-15 9:29 ` Jes Sorensen
2006-09-14 17:51 ` Karim Yaghmour
2006-09-14 15:19 ` Mathieu Desnoyers
2006-09-14 19:39 ` Frank Ch. Eigler
2006-09-15 17:13 ` Jose R. Santos
2006-09-14 15:02 ` Mathieu Desnoyers
2006-09-14 15:14 ` Martin J. Bligh
2006-09-14 17:43 ` Ingo Molnar
2006-09-14 18:25 ` Karim Yaghmour
2006-09-14 20:03 ` Martin Bligh
2006-09-14 20:14 ` Ingo Molnar
2006-09-14 20:40 ` Martin Bligh
2006-09-14 21:05 ` Michel Dagenais
2006-09-14 22:23 ` Ingo Molnar
2006-09-14 22:46 ` Martin Bligh
2006-09-14 22:56 ` Ingo Molnar
2006-09-14 19:03 ` grundig
2006-09-14 19:21 ` Karim Yaghmour
2006-09-14 19:48 ` Frank Ch. Eigler
2006-09-15 16:32 ` Jose R. Santos
2006-09-19 11:59 ` Christoph Hellwig
-- strict thread matches above, loose matches on Subject: below --
2006-09-15 3:10 James Dickens
2006-09-15 9:17 Richard J Moore
2006-09-15 17:14 Chuck Ebbert
2006-09-15 18:32 ` Alan Cox
2006-09-16 10:46 ` Jes Sorensen
2006-09-25 15:20 Chuck Ebbert
2006-09-25 15:39 ` Ingo Molnar
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