From: "Frank Ch. Eigler" <fche@redhat.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>,
Martin Bligh <mbligh@google.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
linux-kernel@vger.kernel.org, prasad@linux.vnet.ibm.com,
Linus Torvalds <torvalds@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
od@suse.com, Andrew Morton <akpm@linux-foundation.org>,
hch@lst.de, David Wilder <dwilder@us.ibm.com>,
Tom Zanussi <zanussi@comcast.net>
Subject: Re: [RFC PATCH] LTTng relay buffer allocation, read, write
Date: Tue, 30 Sep 2008 16:01:12 -0400 [thread overview]
Message-ID: <20080930200112.GD27822@redhat.com> (raw)
In-Reply-To: <alpine.DEB.1.10.0809301541120.7993@gandalf.stny.rr.com>
Hi -
On Tue, Sep 30, 2008 at 03:43:45PM -0400, Steven Rostedt wrote:
> [...]
> On Tue, 30 Sep 2008, Mathieu Desnoyers wrote:
> >
> > You are actually using them to put redundant information that could be
> > encoded differently and thus save 4 bits per event records, more or less
> > what will be needed by most tracers (15 IDs, 1 reserved for an extended
> > ID field).
>
> I really like the idea of keeping the tracer event ids out of the ring
> buffer logic.
That's fine for a ring buffer that only ever contains data from one
event source. How do you imagine multiplexing working, where one
wants to grep a single debugfs file that contains data from different
event sources? Punt to another layer?
- FChE
next prev parent reply other threads:[~2008-09-30 20:06 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-27 13:40 [RFC PATCH] LTTng relay buffer allocation, read, write Mathieu Desnoyers
2008-09-27 17:10 ` Peter Zijlstra
2008-09-28 8:59 ` Peter Zijlstra
2008-09-29 16:06 ` Mathieu Desnoyers
2008-09-29 15:50 ` Mathieu Desnoyers
2008-09-29 16:38 ` Steven Rostedt
2008-09-29 18:38 ` Mathieu Desnoyers
2008-09-29 19:40 ` Steven Rostedt
2008-09-29 19:54 ` Steven Rostedt
2008-09-29 17:30 ` Peter Zijlstra
2008-09-29 20:31 ` Mathieu Desnoyers
2008-09-29 21:24 ` Steven Rostedt
2008-09-30 17:22 ` Martin Bligh
2008-09-30 17:23 ` Martin Bligh
2008-09-30 18:14 ` Mathieu Desnoyers
2008-09-30 18:22 ` Steven Rostedt
2008-09-30 18:35 ` Mathieu Desnoyers
2008-09-30 19:43 ` Steven Rostedt
2008-09-30 20:01 ` Frank Ch. Eigler [this message]
2008-09-30 20:21 ` Steven Rostedt
2008-09-30 19:44 ` Martin Bligh
2008-09-30 19:54 ` Mathieu Desnoyers
2008-09-30 20:49 ` Martin Bligh
2008-09-30 20:55 ` Mathieu Desnoyers
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