linux-kernel - Re: [RFC] [Patch 4/4] lock contention tracking slimmed down

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Date:	Thu, 07 Jun 2007 09:51:23 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Martin Peschke <mp3@...ibm.com>
Cc:	linux-kernel@...r.kernel.org, jbaron@...hat.com,
	rostedt@...dmis.org, billh@...ppy.monkey.org, mingo@...e.hu,
	linux-s390@...r.kernel.org
Subject: Re: [RFC] [Patch 4/4] lock contention tracking slimmed down

On Wed, 2007-06-06 at 23:34 +0200, Martin Peschke wrote:

> +struct statistic_info lock_stat_info[_LOCK_STAT_NUMBER] = {
> +	[LOCK_STAT_CONT] = {
> +		.name	  = "contentions",
> +		.x_unit	  = "instruction_pointer",
> +		.y_unit	  = "occurrence",
> +		.defaults = "type=sparse entries=4",
> +		.flags	  = STATISTIC_FLAGS_LABEL,
> +	},
> +	[LOCK_STAT_WAIT_READ] = {
> +		.name	  = "wait_read",
> +		.x_unit	  = "nanoseconds",
> +		.y_unit	  = "occurrence",
> +		.defaults = "type=utilisation",
> +	},
> +	[LOCK_STAT_WAIT_WRITE] = {
> +		.name	  = "wait_write",
> +		.x_unit	  = "nanoseconds",
> +		.y_unit	  = "occurrence",
> +		.defaults = "type=utilisation",
> +	},
> +	[LOCK_STAT_HOLD_READ] = {
> +		.name	  = "hold_read",
> +		.x_unit	  = "nanoseconds",
> +		.y_unit	  = "occurrence",
> +		.defaults = "type=utilisation",
> +	},
> +	[LOCK_STAT_HOLD_WRITE] = {
> +		.name	  = "hold_write",
> +		.x_unit	  = "nanoseconds",
> +		.y_unit	  = "occurrence",
> +		.defaults = "type=utilisation",
>  	}
>  };

You're parsing strings in-kernel to setup data structures?

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