linux-kernel - Re: [RFC PATCH 0/3] ftrace: Add a ftrace test collection

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Message-ID: <20140805173752.1de5f1c2@gandalf.local.home>
Date:	Tue, 5 Aug 2014 17:37:52 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc:	Tom Zanussi <tom.zanussi@...ux.intel.com>,
	Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@...achi.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH 0/3] ftrace: Add a ftrace test collection

Hi Masami,

This looks great. I'm a bit busy at the moment (just came back from
vacation, and digging myself out of the hole that left me). But I
definitely want this in. I have a bunch of tests too, that I can put on
top of this. My tests are rather hacky, and hard code a lot of stuff in
them, but they do test a bunch of features of ftrace. It shouldn't be
too hard to include them here.


On Tue, 05 Aug 2014 02:45:44 +0000
Masami Hiramatsu <masami.hiramatsu.pt@...achi.com> wrote:

> Hi,
> 
> I'd like to introduce a collection of testcases for ftrace to
> avoid regressions.
> 
> For a long time, we've tried to stabilize and extend ftrace
> tracing infrastructure. This small test framework is a kind of
> stabilizing work for ftrace. For the first step, this series
> just introduces a few basic testcases. However, it is easy to
> add additional tests. I'd like to ask you, ftrace developers,
> to add tests for your features to ensure it will not be broken
> by future works.
> 
> ftracetest is a tiny bash script so that anyone can easily
> understand what it does. I think it is better to share and
> discuss this tests before growing it.
> 
>  - Is it enough to support bash script? (of course you can
>    invoke other commands from the script)
>  - What's the good naming method of testcases?
>  - Is any dependency check required?
> 
> BTW, I decided to put this under tools/testing/ftrace instead
> of tools/testing/selftests/, because all tests requires root
> privilege. It will be one of discussion points. Anyway,
> it is easy to integrate this to the selftests.

I agree. I think having its own directory is a good idea. Lets see what
other people think. When I get time, I'll see if I can start a branch
that pulls this in and start adding my own tests on top of it.

Thanks!

-- Steve
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