linux-kernel - Re: [PATCH -tip] perf stat: define CHECK

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Date:	Tue, 30 Jun 2009 12:08:35 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Jaswinder Singh Rajput <jaswinder@...nel.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -tip] perf stat: define CHECK_ATTRS for easy attrs
	checking


* Jaswinder Singh Rajput <jaswinder@...nel.org> wrote:

> CHECK_ATTRS is useful :
>  1. for multiple attrs checking
>  2. avoid repetition of PERF_TYPE_ and PERF_COUNT_ and save space
>  3. avoids line breakage
> 
> Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@...il.com>
> ---
>  tools/perf/builtin-stat.c |   18 ++++++++----------
>  1 files changed, 8 insertions(+), 10 deletions(-)
> 
> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
> index 3e5ea4e..6231b39 100644
> --- a/tools/perf/builtin-stat.c
> +++ b/tools/perf/builtin-stat.c
> @@ -96,6 +96,10 @@ static u64			walltime_nsecs_noise;
>  static u64			runtime_cycles_avg;
>  static u64			runtime_cycles_noise;
>  
> +#define CHECK_ATTRS(t, c, counter)			\
> +	(attrs[counter].type == PERF_TYPE_##t &&	\
> +	 attrs[counter].config == PERF_COUNT_##c)

looks good except that the name should be something like 
MATCH_EVENT() not CHECK_ATTRS().

	Ingo
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