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Date: Wed, 10 Jan 2001 00:14:22 +0900
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Subject: [FreeBSD-users-jp 58103] Re: too fast clock
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$BB?$/$NJ}!9$K=u8@$rD:$-46<U$7$F$*$j$^$9!#(B

On Tue, 09 Jan 2001 19:07:57 +0900
$B<+J,<+?H$O=q$-$^$7$?(B:

> $B<B$O(Bi8254 clock: ... $B$NCM$O7k9=JQ$o$k$N$G$9$,!"(B
> options	    TIMER_FREQ=2359004
> $B$K$7$F(Bkernel$B$r:n$C$F$_$^$7$?!#(B
($BCfN,(B)
> $B$b$&>/$7(BTIMER_FREQ$B$NCM$rD4@0$7$F$_$^$9!#(B

$B$N$D$b$j$G$7$?$,!"(B
i8254 clock: ... $B$NCM$,5/F0$9$k$?$S$KBg$-$/JQ$o$k$;$$$+(B(1000000$B!A(B3000000)$B!"(B
$B$h$5$=$&$J(BTIMER_FREQ$B$NCM$r8+$D$1$F$b<!$K5/F0$9$k$H;~7W$,Bg$-$/68$C$?$j$7(B
$B$^$9!#(B(500MHz$B$N(BCPU$B$,(B1.5GHz$B$@$H8@$o$l$?$H$-$K$O6C$-$^$7$?(B)


$B$=$3$G0J2<$N:v$r$H$C$F$_$^$7$?!#(B

1) clock.c$B$N=q$-49$((B
   756          if (delta < timer_freq / 100) {
   757  #ifndef CLK_USE_I8254_CALIBRATION
   758                  if (bootverbose)
   759                          printf(
   760  "CLK_USE_I8254_CALIBRATION not specified - using default frequency\n");
   761                  freq = timer_freq;
   762  #endif
   763                  timer_freq = freq;
   764          } else {
   765                  if (bootverbose)
   766                          printf(
   767                      "%d Hz differs from default of %d Hz by more than 1%%\n",
   768                                 freq, timer_freq);
   769                  tsc_freq = 0; 
   770          }

769$B9TL\$r%3%a%s%H%"%&%H$K$7$^$7$?!#(B

2) options         CLK_USE_TSC_CALIBRATION  $B$r$D$1$F(Bkernel$B$N:F9=C[(B

$B$3$l$G(Bboot -v$B$7$?$H$-$N%a%C%;!<%8$,0J2<$N$H$*$j$G$9!#(B

Calibrating clock(s) ... TSC clock: 501733434 Hz, i8254 clock: 2325573 Hz
2325573 Hz differs from default of 1193182 Hz by more than 1%
Timecounter "i8254"  frequency 1193182 Hz
Timecounter "TSC"  frequency 501733434 Hz
CPU: AMD-K6(tm) 3D processor (501.73-MHz 586-class CPU)

$B?t;~4VDxEY$7$+F0$+$7$F$$$^$;$s$,;~7W$K0[>o$O$J$5$=$&$G$9!#(B

$B!t(B $B$3$s$JJ}K!$G$h$$$N$G$7$g$&$+(B?



fn3y-tnk@asahi-net.or.jp
$BEDCf!w@DG_(B

