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