Date: Tue, 24 Nov 1998 13:24:12 -0600 (CST) From: Kevin Day <toasty@home.dragondata.com> To: julian@whistle.com (Julian Elischer) Cc: current@FreeBSD.ORG Subject: Re: MediaGX and calcru: negative time Message-ID: <199811241924.NAA19240@home.dragondata.com> In-Reply-To: <3651D4A1.7566F4CF@whistle.com> from Julian Elischer at "Nov 17, 98 11:55:13 am"
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> Kevin Day wrote:
> >
> > On a possibly related note, after upgrading to -current:
> >
> > > FreeBSD 2.2.7-RELEASE #0: Wed Oct 21 16:22:35 CDT 1998
> > > devel@kevin1.touchmaster:/usr/src/sys/compile/DEVEL
> > > CPU: Cyrix GXm (0.00-MHz 586-class CPU)
> > > Origin = "CyrixInstead" Id = 0x540 DIR=0x3346 Stepping=3 Revision=3
> > > real memory = 63963136 (62464K bytes)
> > > avail memory = 60252160 (58840K bytes)
> >
> > FreeBSD 3.0-RELEASE #0: Mon Nov 16 16:10:02 CST 1998
> > root@kevin1.touchmaster:/usr/src/sys/compile/DEVEL
> > Timecounter "i8254" frequency 1193182 Hz cost 40336 ns
> > Timecounter "TSC" frequency 20172892 Hz cost 180 ns
> > CPU: Cyrix GXm (20.17-MHz 586-class CPU)
> > Origin = "CyrixInstead" Id = 0x540 Stepping=0 DIR=0x3346
> > Features=0x808131<FPU,TSC,MSR,CX8,CMOV,MMX>
> > real memory = 63963136 (62464K bytes)
> > avail memory = 60243968 (58832K bytes)
> >
> > The clock now runs super fast.
>
To follow up..... Patching according to PR/6630 (and probing 4 times, not 2)
and modifying i8254_get_timecount still doesn't have the problem completely
fixed.
I now see:
FreeBSD 3.0-RELEASE #4: Tue Nov 24 13:11:34 CST 1998
devel@kevin1.touchmaster:/usr/src/sys/compile/DEVEL
Calibrating clock(s) ... TSC clock: 233904016 Hz, i8254 clock: 1217253 Hz
1217253 Hz differs from default of 1193182 Hz by more than 1%
Timecounter "i8254" frequency 1193182 Hz cost 4419 ns
Timecounter "TSC" frequency 210479132 Hz cost 193 ns
interrupt total rate
clk0 irq0 34825 89
rtc0 irq8 44567 114
Any further suggestions? This is much closer, but the clock still runs too
quickly.
Kevin
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