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Date: Thu, 12 Oct 1995 13:39:52 -0700
From: "Garrett A. Wollman" <wollman>
Message-Id: <199510122039.NAA27738@freefall.freebsd.org>
To: CVS-commiters, cvs-sys
Subject: cvs commit: src/sys/i386/isa clock.c
Sender: owner-commit@FreeBSD.org
Precedence: bulk

wollman     95/10/12 13:39:51

  Modified:    sys/kern  kern_clock.c
  Log:
  Improve clock accuracy by accounting for late/missed clock interrupts
  if the hardware supports it.

  Modified:    sys/i386/i386  microtime.s
               sys/i386/include  clock.h
               sys/i386/isa  clock.c
  Log:
  Reduce jitter of Pentium microtime() implementation by letting the counter
  free-run and doing a subtract in microtime() rather than resetting the
  counter to zero at every clock tick.  In combination with the changes to
  kern_clock.c, this should eliminate all the immediately obvious sources
  of systematic jitter in timekeeping on Pentium machines.