Date: Mon, 24 May 1999 14:09:23 +0900 From: Mitsuru IWASAKI <iwasaki@jp.FreeBSD.org> To: randy@psg.com Cc: freebsd-mobile@freebsd.org Subject: Re: PAO3-19990518 gives calcru: negative time of -69... Message-ID: <199905240510.OAA23390@tasogare.imasy.or.jp> In-Reply-To: Your message of "Sat, 22 May 1999 23:53:30 -0700 (PDT)" <m10lS8Y-00000BC@roam.psg.com> References: <m10lS8Y-00000BC@roam.psg.com>
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randy> calcru: negative time of -16087 usec for pid 7 ([)
Could you try this?
sysctl -w kern.timecounter.method=1
This problem seems 3.X problem, not PAO specific one.
Another story, we had similar problem after resuming
on some NotePCs. we fixed this by reseting i8254 state in
apm_default_resume().
The following is the added code in PAO3
by Kenjiro Cho-san (kjc@csl.sony.co.jp).
/sys/i386/isa/clock.c:
/*
* i8254_restore is called from apm_default_resume() to reload
* the countdown register.
* this should not be necessary but there are broken laptops that
* do not restore the countdown register on resume.
* when it happnes, it messes up the hardclock interval and system clock,
* which leads to the infamous "calcru: negative time" problem.
*/
void
i8254_restore(void)
{
u_long ef;
ef = read_eflags();
disable_intr();
outb(TIMER_MODE, TIMER_SEL0 | TIMER_RATEGEN | TIMER_16BIT);
outb(TIMER_CNTR0, timer0_max_count & 0xff);
outb(TIMER_CNTR0, timer0_max_count >> 8);
CLOCK_UNLOCK();
write_eflags(ef);
}
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