linux-kernel - Re: [RFC v01 1/3] PowerCap: Documentation

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Message-ID: <1375488644.2034.150.camel@joe-AO722>
Date:	Fri, 02 Aug 2013 17:10:44 -0700
From:	Joe Perches <joe@...ches.com>
To:	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
Cc:	linux-kernel@...r.kernel.org, gregkh@...uxfoundation.org
Subject: Re: [RFC v01 1/3] PowerCap: Documentation

On Fri, 2013-08-02 at 11:08 -0700, Srinivas Pandruvada wrote:
> Added power cap framework documentation. This explains the use of power capping framework,
> sys-fs and programming interface.

[]

> +Power Zone Attributes
> +=================================
> +Monitoring attributes
> +----------------------
> +	
> +energy_uj (rw): Current energy counter in micro-joules. Write to energy counter
> +resets the counter to zero. If the counter can not be reset, then this attribute
> +is read-only.
> +
> +max_energy_range_uj (ro): Range of the above energy counter in micro-joules.
> +
> +power_uw (rw): Current power counter in micro-watts. Write to this counter
> +resets the counter to zero. If the counter can not be reset, then this attribute
> +is read-only.
> +max_power_range_uw (ro): Range of the above energy counter in micro-watts.
> +
> +It is possible that some domains can have both power and energy counters and
> +ranges, but at least one is mandatory.

Given that the ranges seem to be u64s, perhaps the
lower bounds are too high.  Why not nano/pico/fempto
watts/joules/seconds?


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