From: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com>
To: Stefan Hajnoczi <stefanha@gmail.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
linux-kernel@vger.kernel.org,
Herbert Xu <herbert@gondor.hengli.com.au>,
Arnd Bergmann <arnd@arndb.de>,
Frederic Weisbecker <fweisbec@gmail.com>,
yrl.pp-manager.tt@hitachi.com, qemu-devel@nongnu.org,
Borislav Petkov <bp@amd64.org>,
virtualization@lists.linux-foundation.org,
"Franch Ch. Eigler" <fche@redhat.com>,
Ingo Molnar <mingo@redhat.com>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Steven Rostedt <rostedt@goodmis.org>,
Anthony Liguori <anthony@codemonkey.ws>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Amit Shah <amit.shah@redhat.com>,
Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
Dhaval Giani <dhaval.giani@gmail.com>
Subject: Re: Re: Re: [RFC PATCH 0/6] virtio-trace: Support virtio-trace
Date: Wed, 25 Jul 2012 18:13:08 +0900 [thread overview]
Message-ID: <500FB8A4.6060503@hitachi.com> (raw)
In-Reply-To: <CAJSP0QVuQnE68n=jyW+AE=WF3yDHjgdn7tdiz7rPTbtqGYFL4w@mail.gmail.com>
Hi Stefan,
(2012/07/24 22:41), Stefan Hajnoczi wrote:
> On Tue, Jul 24, 2012 at 12:19 PM, Yoshihiro YUNOMAE
> <yoshihiro.yunomae.ez@hitachi.com> wrote:
>>>> Are you using text formatted ftrace?
>> No, currently using raw format, but we'd like to reformat it in text.
>
> Capturing the info necessary to translate numbers into symbols is one
> of the problems of host<->guest tracing so I'm curious how you handle
> this :).
Right, your consideration is true.
> Apologies for my lack of ftrace knowledge but how useful is the raw
> tracing data on the host? How do you pretty-print it in
> human-readable form?
perf and trace-cmd can actually translate raw-formatted trace data to
text-formatted trace data by using information of kernel or trace
format under tracing/events directory in debugfs. In the same way, if
the information of a guest is exported to a host, we can translate
raw trace data of a guest to text trace data on a host. We will use
9pfs to export that.
Thank you,
--
Yoshihiro YUNOMAE
Software Platform Research Dept. Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: yoshihiro.yunomae.ez@hitachi.com
next prev parent reply other threads:[~2012-07-25 9:13 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-24 2:36 Yoshihiro YUNOMAE
2012-07-24 2:37 ` [RFC PATCH 1/6] virtio/console: Add splice_write support Yoshihiro YUNOMAE
2012-08-09 9:00 ` Amit Shah
2012-08-09 9:12 ` Masami Hiramatsu
2012-07-24 2:37 ` [RFC PATCH 2/6] virtio/console: Add a failback for unstealable pipe buffer Yoshihiro YUNOMAE
2012-08-09 9:03 ` Amit Shah
2012-08-09 9:24 ` Borislav Petkov
2012-08-09 9:24 ` Masami Hiramatsu
2012-08-09 9:55 ` Amit Shah
2012-08-09 9:58 ` Avi Kivity
2012-08-09 10:14 ` Amit Shah
2012-08-09 12:35 ` Steven Rostedt
2012-07-24 2:37 ` [RFC PATCH 3/6] virtio/console: Wait until the port is ready on splice Yoshihiro YUNOMAE
2012-07-24 2:37 ` [RFC PATCH 4/6] ftrace: Allow stealing pages from pipe buffer Yoshihiro YUNOMAE
2012-07-30 22:12 ` Steven Rostedt
2012-07-24 2:37 ` [RFC PATCH 5/6] virtio/console: Allocate scatterlist according to the current pipe size Yoshihiro YUNOMAE
2012-07-24 2:37 ` [RFC PATCH 6/6] tools: Add guest trace agent as a user tool Yoshihiro YUNOMAE
2012-07-24 3:27 ` [RFC PATCH 0/6] virtio-trace: Support virtio-trace Masami Hiramatsu
2012-07-24 10:02 ` Stefan Hajnoczi
2012-07-24 11:03 ` Masami Hiramatsu
2012-07-24 11:19 ` Yoshihiro YUNOMAE
2012-07-24 13:41 ` Stefan Hajnoczi
2012-07-25 9:13 ` Yoshihiro YUNOMAE [this message]
2012-07-26 10:52 ` Stefan Hajnoczi
2012-07-24 13:43 ` Stefan Hajnoczi
2012-07-24 20:26 ` [Qemu-devel] " Blue Swirl
2012-07-25 8:15 ` Masami Hiramatsu
2012-07-27 18:58 ` Blue Swirl
2012-07-26 11:35 ` Amit Shah
2012-07-27 8:55 ` Yoshihiro YUNOMAE
2012-07-27 9:43 ` Amit Shah
2012-07-31 0:52 ` Yoshihiro YUNOMAE
2012-08-09 10:16 ` Amit Shah
2012-08-21 2:17 ` Rusty Russell
2012-08-21 5:09 ` Amit Shah
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