From owner-cvs-src@FreeBSD.ORG  Sat Feb  5 23:16:27 2005
Return-Path: <owner-cvs-src@FreeBSD.ORG>
Delivered-To: cvs-src@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id D2D7216A4CE; Sat,  5 Feb 2005 23:16:27 +0000 (GMT)
Received: from repoman.freebsd.org (repoman.freebsd.org [216.136.204.115])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id BC62143D1D; Sat,  5 Feb 2005 23:16:27 +0000 (GMT)
	(envelope-from njl@FreeBSD.org)
Received: from repoman.freebsd.org (localhost [127.0.0.1])
	by repoman.freebsd.org (8.13.1/8.13.1) with ESMTP id j15NGRh1059574;
	Sat, 5 Feb 2005 23:16:27 GMT
	(envelope-from njl@repoman.freebsd.org)
Received: (from njl@localhost)
	by repoman.freebsd.org (8.13.1/8.13.1/Submit) id j15NGRAi059573;
	Sat, 5 Feb 2005 23:16:27 GMT
	(envelope-from njl)
Message-Id: <200502052316.j15NGRAi059573@repoman.freebsd.org>
From: Nate Lawson <njl@FreeBSD.org>
Date: Sat, 5 Feb 2005 23:16:27 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org,
	cvs-all@FreeBSD.org
X-FreeBSD-CVS-Branch: HEAD
Subject: cvs commit: src/sys/i386/i386 machdep.c src/sys/amd64/amd64
 machdep.c
X-BeenThere: cvs-src@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: CVS commit messages for the src tree <cvs-src.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-src>
List-Post: <mailto:cvs-src@freebsd.org>
List-Help: <mailto:cvs-src-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 05 Feb 2005 23:16:28 -0000

njl         2005-02-05 23:16:27 UTC

  FreeBSD src repository

  Modified files:
    sys/i386/i386        machdep.c 
    sys/amd64/amd64      machdep.c 
  Log:
  Make cpu_est_clockrate() more accurate by disabling interrupts for the
  millisecond it is calibrating.  Suggested by jhb@ and bde@.  Don't clobber
  the tsc_freq with the new value since it isn't accurate enough for
  timecounters and the timecounter system as a whole needs support for
  changing rates before we do this.  Subtract 0.5% from our measurement
  to account for overhead in DELAY.  Note that this interface is for
  estimating the clockrate and needs to work well at runtime so doing a full
  calibration including disabling interrupts for a second is not feasible.
  
  Revision  Changes    Path
  1.628     +10 -2     src/sys/amd64/amd64/machdep.c
  1.606     +10 -2     src/sys/i386/i386/machdep.c