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Re: CPU API (Re: [sysinfo] draft ready for review)

From: Max Froumentin <maxfro@opera.com>
Date: Wed, 06 Jan 2010 11:32:11 +0100
Message-ID: <4B4466AB.70504@opera.com>
To: Thomas Roessler <tlr@w3.org>
CC: "public-device-apis@w3.org" <public-device-apis@w3.org>
On 05/01/2010 17:25, Thomas Roessler wrote:
> A few comments:
> - What's our use case for inquiring about CPU frequency?

Like for Power, it's a question of whether you're interested in
individual hardware CPUs, or whether you only care about the global
load. See my previous email.

> - What's our use case for *setting* CPU frequency from a Web
> application?

To be able to throttle the CPU, like those applications that allow you
to select between "conservative", "performance", "power saving" profiles.

> - CPU load (and detailed power consumption along with it) can be a
> data leak.  I'd like the spec to be clear that this value will
> generally be an average taken over time,

That's up to the implementation to decide I would expect. Or we would 
have to specify how to sample battery levels, ambient temperature. It's 
like blurring the picture of a contact in the Contact API, in a way.

  and I'd like the spec to
> caution against just making this information available.

I'm happy to add whatever text will come out of the Policy work.

Received on Wednesday, 6 January 2010 10:32:45 UTC

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