Re: NTP broken with 2.6.14

[Jean-Christian de Rivaz <jc@eclis.ch>]

Roman Zippel a écrit :
> Hi,
> 
> On Thu, 3 Nov 2005, Jean-Christian de Rivaz wrote:
> 
> 
>>From the /var/log/ntpstats/peerstats history, the offset start growing
>>exactly at the same time I rebooted with the new 2.6.14 kernel. The ntpd
>>is the from the Debian Sarge version "ntpd 4.2.0a@1:4.2.0a+stable-2-r
>>Fri Aug 26 10:30:12 UTC 2005 (1)".
> 
> 
> Could you post a few lines from loopstats from before and after the 
> upgrade? Do you have adjtimex installed? If yes, what's in 
> /etc/default/adjtimex?

Here is a visible transition into the loopstats history:

53675 46251.308 0.004081011 -194.259811 0.005871592 17.580735 10
53675 47277.997 -0.000660212 -194.262329 0.005610392 15.279835 10
53675 48303.646 0.002776830 -194.251724 0.005153706 14.303375 10
53675 49330.304 0.004138248 -194.235901 0.004514851 14.801189 10
53675 50353.973 0.003474513 -194.222672 0.003924034 14.497788 10
53675 51379.750 0.000253633 -194.221710 0.003760592 12.565096 10
53675 52406.302 0.003895862 -194.206818 0.003731353 13.287282 10
53675 53432.968 0.004171375 -194.190887 0.003234381 14.104549 10
53675 54456.672 0.000078349 -194.190598 0.003469025 12.215800 10
53675 55481.298 0.003641894 -194.176697 0.003492895 12.750438 10
53675 56504.967 0.002649463 -194.166611 0.003065365 12.190070 10
53675 57531.730 0.000912963 -194.163132 0.002793064 10.706129 10
53675 58558.296 0.003194148 -194.150925 0.002674295 11.181610 10
53675 59584.996 0.002605389 -194.140976 0.002334641 10.941553 10
53675 60611.694 0.004877513 -194.122314 0.002319170 13.456606 10
53675 61636.321 0.003967914 -194.107178 0.002059309 13.995452 10
53675 62660.051 0.007092572 -194.080124 0.002370957 18.405714 10
53675 63684.643 0.001312519 -194.075119 0.003545184 16.144477 10
53675 64710.293 -0.000216660 -194.075943 0.003163992 13.987890 10
53675 65735.018 0.002720645 -194.065567 0.003108870 13.227565 10
53675 66759.621 0.000030339 -194.065460 0.003009692 11.455537 10
53675 67784.291 -0.000155943 -194.066055 0.002608133 9.925464 10
53675 68426.784 0.000000000 -194.065994 0.000003304 0.000184 6
53675 68491.127 -0.013804111 -194.921677 0.006902056 27.381836 6
53675 68748.284 -0.003905727 -195.879013 0.007760366 38.740322 6
53675 68811.324 -0.003714981 -196.102203 0.006721351 34.301879 6
53675 69440.055 0.000000000 -194.065994 0.000003304 0.000184 6
53675 69503.047 0.000000000 -194.065994 0.000002861 0.000159 6
53675 69569.039 0.000000000 -194.065994 0.000002478 0.000138 6
53675 69635.029 0.000000000 -194.065994 0.000002146 0.000119 6
53675 69699.021 0.000000000 -194.065994 0.000001858 0.000103 6
53675 69762.012 0.000000000 -194.065994 0.000001609 0.000089 7
53675 69825.004 0.000000000 -194.065994 0.000001394 0.000077 7
53675 69889.996 0.000000000 -194.065994 0.000001207 0.000067 7
53675 69952.987 0.000000000 -194.065994 0.000001045 0.000058 7
53675 70017.979 0.000000000 -194.065994 0.000000905 0.000050 7
53675 70083.970 0.000000000 -194.065994 0.000000784 0.000044 8
53675 70149.961 0.000000000 -194.065994 0.000000679 0.000038 8
53675 70213.953 0.000000000 -194.065994 0.000000588 0.000033 8
53675 70276.945 0.000000000 -194.065994 0.000000509 0.000028 8
53675 70339.936 0.000000000 -194.065994 0.000000441 0.000025 9
53675 70403.928 0.000000000 -194.065994 0.000000382 0.000021 9
53675 70471.919 0.000000000 -194.065994 0.000000331 0.000018 9
53675 70536.910 0.000000000 -194.065994 0.000000286 0.000016 9
53675 70601.906 0.000000000 -194.065994 0.000000248 0.000014 10
53675 70665.893 0.000000000 -194.065994 0.000000215 0.000012 10
53675 70728.885 0.000000000 -194.065994 0.000000186 0.000010 10
53675 70791.878 0.000000000 -194.065994 0.000000161 0.000009 10
53675 70854.869 0.000000000 -194.065994 0.000000140 0.000008 10
53675 70918.860 0.000000000 -194.065994 0.000000121 0.000007 10

I did not have adjtimex installed. I just intalled it to see what 
happens. The adjtimexconfig calculate the following values into the 
/etc/default/adjtimex file:
TICK=121
FREQ=3597582

When I do a "/etc/init.d/adjtimex start" I get an error and a strange 
value of USER_HZ since the kernel is configured for a HZ of 250 (maybe 
this two values are not related, I don't know about this):

talla:~# /etc/init.d/adjtimex start
Regulating system clock...adjtimex: Invalid argument
for this kernel:
    USER_HZ = 100 (nominally 100 ticks per second)
    9000 <= tick <= 11000
    -33554432 <= frequency <= 33554432
done.

talla:~# zcat /proc/config.gz | egrep HZ
# CONFIG_HZ_100 is not set
CONFIG_HZ_250=y
# CONFIG_HZ_1000 is not set
CONFIG_HZ=250
CONFIG_MACHZ_WDT=m

Thanks,
-- 
Jean-Christian de Rivaz