From: Steven Rostedt <rostedt@goodmis.org>
To: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Ingo Molnar <mingo@elte.hu>, Theodore Tso <tytso@MIT.EDU>,
Frederic Weisbecker <fweisbec@gmail.com>, Jan Kara <jack@suse.cz>,
Thomas Gleixner <tglx@linutronix.de>,
Li Zefan <lizf@cn.fujitsu.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Masami Hiramatsu <mhiramat@redhat.com>,
LKML <linux-kernel@vger.kernel.org>,
Douglas Santos <douglas.santos@polymtl.ca>
Subject: Re: [PATCH 0/18] Allow different tracers to be compiled independently
Date: Tue, 23 Mar 2010 09:18:51 -0400 [thread overview]
Message-ID: <1269350331.5363.233.camel@localhost> (raw)
In-Reply-To: <20100323122747.GA14954@Krystal>
On Tue, 2010-03-23 at 08:27 -0400, Mathieu Desnoyers wrote:
> * Ingo Molnar (mingo@elte.hu) wrote:
> >
>
> We're in complete agreement here. When I considered if it was worth it to create
> such a per-tracepoint group compile-time disabling in the first place, I decided
> not to do it precisely due to the added-value that comes with the availability
> of system-wide tracepoints. And I think with the static jump patching, we are
> now at a point where the overhead is stunningly low.
>
> Now, space-wise, the one thing I would consider appropriate as a compromise for
> small embedded systems would be to allow the TRACE_EVENT probes to be compiled
> as modules.
Yeah, I agree here. Hmm, I wonder if we could automate this. That is, we
could now, create a module per trace system if it is so configured. It
would move the functions that create, record and output the trace points
in TRACE_EVENT() into a separate module. Then you just need to load the
modules you want to trace (grouped by system).
We can make add kobjects to /sys so that udev loads them automatically
for distros.
-- Steve
next prev parent reply other threads:[~2010-03-23 13:18 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-23 0:32 [PATCH 0/18] Allow different tracers to be compiled independently Jan Kara
2010-03-23 0:32 ` [PATCH 01/18] trace: Allow <linux/tracepoint.h> to create empty tracepoints Jan Kara
2010-03-23 1:06 ` Steven Rostedt
2010-03-26 1:30 ` Jan Kara
2010-03-23 0:32 ` [PATCH 02/18] block: Generate blktrace trace points only if blktrace is enabled Jan Kara
2010-03-23 0:32 ` [PATCH 03/18] mm: Generate kmemtrace trace points only if they are enabled Jan Kara
2010-03-23 0:32 ` [PATCH 04/18] mac80211: Generate trace points only if api tracer enabled Jan Kara
2010-03-23 1:11 ` Johannes Berg
2010-03-23 23:54 ` Steven Rostedt
2010-03-23 0:32 ` [PATCH 05/18] workqueue: Generate trace points only when workqueue " Jan Kara
2010-03-23 0:32 ` [PATCH 06/18] sched: Generate trace points only if scheduler tracing is enabled Jan Kara
2010-03-23 1:07 ` Frederic Weisbecker
2010-03-23 23:52 ` Steven Rostedt
2010-03-24 0:31 ` Frederic Weisbecker
2010-03-23 0:32 ` [PATCH 07/18] ext4: Provide config options for enabling ext4 and jbd2 tracing Jan Kara
2010-03-23 0:32 ` [PATCH 08/18] lockdep: Provide config option for enabling lock tracepoints Jan Kara
2010-03-23 0:32 ` [PATCH 09/18] module: Provide config option to enable tracing of module load / unload Jan Kara
2010-03-23 0:32 ` [PATCH 10/18] gfs2: Provide config option for enabling trace points Jan Kara
2010-03-23 12:01 ` [Cluster-devel] " Steven Whitehouse
2010-03-23 23:56 ` Steven Rostedt
2010-03-24 11:20 ` Steven Whitehouse
2010-03-24 12:09 ` Steven Rostedt
2010-03-23 0:32 ` [PATCH 11/18] i915: Provide config option for enabling tracepoints Jan Kara
2010-03-23 8:42 ` Chris Wilson
2010-03-23 0:32 ` [PATCH 12/18] timer: Provide config option for enabling timer tracepoints Jan Kara
2010-03-23 2:01 ` Thomas Gleixner
2010-03-23 3:01 ` Steven Rostedt
2010-03-23 0:32 ` [PATCH 13/18] acpi: Provide config option to enable power tracepoints Jan Kara
2010-03-23 0:32 ` [PATCH 14/18] net: Provide config option for enabling SKB tracing Jan Kara
2010-03-23 0:32 ` [PATCH 15/18] net: Provide config option for enabling NAPI tracing Jan Kara
2010-03-23 0:32 ` [PATCH 16/18] Generate empty tracepoints if syscall tracing is disabled Jan Kara
2010-03-23 0:32 ` [PATCH 17/18] kvm: Provide config option for enabling KVM trace events Jan Kara
2010-03-23 0:32 ` [PATCH 18/18] Create config option for enabling IRQ tracepoints Jan Kara
2010-03-23 1:04 ` [PATCH 0/18] Allow different tracers to be compiled independently Frederic Weisbecker
2010-03-23 3:34 ` Theodore Tso
2010-03-23 8:05 ` Ingo Molnar
2010-03-23 12:27 ` Mathieu Desnoyers
2010-03-23 13:18 ` Steven Rostedt [this message]
2010-03-26 0:20 ` Jan Kara
2010-03-26 19:09 ` Frederic Weisbecker
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