linux-kernel - Re: [PATCH] kselftests/ftrace: Add a test for log2 modifier of hist trigger

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Date:	Thu, 25 Feb 2016 08:56:11 -0600
From:	Tom Zanussi <tom.zanussi@...ux.intel.com>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc:	Namhyung Kim <namhyung@...nel.org>, Ingo Molnar <mingo@...hat.com>,
	Shuah Khan <shuahkh@....samsung.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kselftests/ftrace: Add a test for log2 modifier of hist
 trigger

Hi Masami,

On Thu, 2016-02-25 at 18:19 +0900, Masami Hiramatsu wrote:
> Add a test for log2 modifier of hist trigger in hist_mod.tc.
> Here is the test result.
> 
>   ----
>   # ./ftracetest test.d/trigger/trigger-hist-mod.tc
>   === Ftrace unit tests ===
>   [1] event trigger - test histogram modifiers	[PASS]
> 
>   # of passed:  1
>   # of failed:  0
>   # of unresolved:  0
>   # of untested:  0
>   # of unsupported:  0
>   # of xfailed:  0
>   # of undefined(test bug):  0
>   ----
> 
> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
> Cc: Steven Rostedt <rostedt@...dmis.org>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: Shuah Khan <shuahkh@....samsung.com>
> Cc: Namhyung Kim <namhyung@...nel.org>
> Cc: Tom Zanussi <tom.zanussi@...ux.intel.com>
> ---
> 
> Hi Tom, here is the patch to add a test for log2 modifier on your branch.
> 

Thanks!  I'll add it to my branch.

Tom

> Thanks,
> ---
>  .../ftrace/test.d/trigger/trigger-hist-mod.tc      |   10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/tools/testing/selftests/ftrace/test.d/trigger/trigger-hist-mod.tc b/tools/testing/selftests/ftrace/test.d/trigger/trigger-hist-mod.tc
> index 57e350a..c2b61c4 100644
> --- a/tools/testing/selftests/ftrace/test.d/trigger/trigger-hist-mod.tc
> +++ b/tools/testing/selftests/ftrace/test.d/trigger/trigger-hist-mod.tc
> @@ -60,6 +60,16 @@ for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
>  grep "id: sys_" events/raw_syscalls/sys_exit/hist > /dev/null || \
>      fail "syscall modifier on raw_syscalls/sys_exit did not work"
>  
> +
> +reset_trigger
> +
> +echo "Test histgram with log2 modifier"
> +
> +echo 'hist:keys=bytes_req.log2' > events/kmem/kmalloc/trigger
> +for i in `seq 1 10` ; do ( echo "forked" > /dev/null); done
> +grep 'bytes_req: ~ 2^[0-9]*' events/kmem/kmalloc/hist > /dev/null || \
> +    fail "log2 modifier on kmem/kmalloc did not work"
> +
>  do_reset
>  
>  exit 0
> 
>