linux-kernel - Re: [RFC PATCH 2/4] x86, mwaitt: introduce mwaitx idle with a configurable timer

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Message-ID: <alpine.DEB.2.11.1505211035291.4225@nanos>
Date:	Thu, 21 May 2015 11:41:50 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Andy Lutomirski <luto@...nel.org>
cc:	Huang Rui <ray.huang@....com>, Borislav Petkov <bp@...e.de>,
	Len Brown <lenb@...nel.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>, x86@...nel.org,
	linux-kernel@...r.kernel.org,
	Fengguang Wu <fengguang.wu@...el.com>,
	Aaron Lu <aaron.lu@...el.com>, Tony Li <tony.li@....com>,
	Peter Zijlstra <peterz@...radead.org>,
	John Stultz <john.stultz@...aro.org>
Subject: Re: [RFC PATCH 2/4] x86, mwaitt: introduce mwaitx idle with a
 configurable timer

On Wed, 20 May 2015, Andy Lutomirski wrote:
> John, Peter, Thomas: would it actually make sense to teach the core
> timer/clockevent code about perfect time sources like invariant TSC + TSC

Perfect? There is no such concept in timer land.

> deadline?  AFAICT right now we're not doing anything particularly interesting
> with the TSC deadline timer.

Interesting in what way? We still have to convert from and to
nanoseconds and deal with the clock skew ....

Thanks,

	tglx



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