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From: Andrew Morton <akpm@linux-foundation.org>
To: "David J. Wilder" <dwilder@us.ibm.com>
Cc: linux-kernel@vger.kernel.org, systemtap@sourceware.org,
	prasadav@us.ibm.com, hch@infradead.org
Subject: Re: [PATCH 0/3] A kernel tracing interface
Date: Thu, 28 Feb 2008 02:04:37 -0800	[thread overview]
Message-ID: <20080228020437.8f99f646.akpm@linux-foundation.org> (raw)
In-Reply-To: <1204065517.26964.14.camel@lc4eb748232119.ibm.com>

On Tue, 26 Feb 2008 14:38:37 -0800 "David J. Wilder" <dwilder@us.ibm.com> wrote:

> These patches provide a kernel tracing interface called "trace".
> 
> ChangeLog:
> -Updated to 2.6.25-rc2-mm1
> -Removed sem_watch example, to hard to maintain.
> -Added a new example that demonstrates per-cpu continuous tracing
>  of data generated using marker probes.
> -Removed inline from relay patch.
> -Moved examples into /sample directory.
> 
> The motivation for "trace" is to:
> - Provide a simple set of tracing primitives that will utilize the high-
>   performance and low-overhead of relayfs for passing traces data from
>   kernel to user space.
> - Provide a common user interface for managing kernel traces.
> - Allow for binary as well as ascii trace data.
> - Incorporate features from the systemtap runtime that are
>   useful to others.

So... what's the story on this versus lttng?

Is there some userspace code available for people to test this?  Maybe it's
mentioned and I missed it.

It'd be interesting to see a writeup of the proposed kernel<->userspace
interfaces.  I see a description of kernel-internal interfaces, but how do
users use it?

I see it uses things from blktrace.  Can blktrace be switched over to being
a client of this code?


  reply	other threads:[~2008-02-28 10:06 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-26 22:38 David J. Wilder
2008-02-28 10:04 ` Andrew Morton [this message]
2008-02-28 19:40   ` David Wilder
2008-02-29  5:36     ` K. Prasad
2008-02-29 12:08       ` K. Prasad
  -- strict thread matches above, loose matches on Subject: below --
2007-11-13  1:02 David J. Wilder
2007-10-02 18:55 David J. Wilder
2007-10-02 16:33 David J. Wilder

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