linux-kernel - Re: [RFC][PATCH 2/2] Greatly improve TSC calibration using a timer

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Message-ID: <AANLkTimBkKHQ2ti0K+Lpi+2XctH+V=5n9Y155GwetR0a@mail.gmail.com>
Date:	Sun, 1 Aug 2010 05:07:10 +0900
From:	"Kuwahara,T." <6vvetjsrt26xsrzlh1z0zn4d2grdah@...il.com>
To:	John Stultz <johnstul@...ibm.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Clark Williams <williams@...hat.com>,
	Andi Kleen <andi@...stfloor.org>
Subject: Re: [RFC][PATCH 2/2] Greatly improve TSC calibration using a timer

Hi John,

How about using the O'Rourke's algorithm?
It's much faster and accurate even if an SMI disturbance occurred
during the calibration process.

Reference
O'Rourke, J. (1981). An on-line algorithm for fitting straight lines
between data ranges.
Communications of the ACM, 24, 574-578. doi:10.1145/358746.358758
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