Messages in this thread | | | Date | Wed, 04 Dec 2002 13:29:55 +0100 | From | Kay Diederichs <> | Subject | stock 2.4.20: loading amd76x_pm makes time jiggle on A7M266-D |
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the subject says it all:
if I use the powersaving module amd76x_pm then the time is not kept. The hardware is Asus A7M266-D with 2 MP1900 processors, BIOS is 1004 (but I tried later BIOS versions as well).
Symptoms are:
- ping times vary and there are 'time of day goes back' messages:
64 bytes from xx (1.2.3.4): icmp_seq=4 ttl=64 time=19.549 msec 64 bytes from xx (1.2.3.4): icmp_seq=5 ttl=64 time=2.684 sec Warning: time of day goes back, taking countermeasures. 64 bytes from xx (1.2.3.4): icmp_seq=6 ttl=64 time=9.799 msec 64 bytes from xx (1.2.3.4): icmp_seq=7 ttl=64 time=88 usec 64 bytes from xx (1.2.3.4): icmp_seq=8 ttl=64 time=20.011 msec (addresses edited)
- ntpq -p shows a very high jitter: remote refid st t when poll reach delay offset jitter ============================================================================== loop8.biologie. 134.34.3.18 2 u 6 64 77 0.807 -1920.6 1804.31 helix1.biologie 134.34.3.18 2 u 13 64 77 0.348 -1914.9 1803.99
- ntpd complains:
Dec 3 19:18:51 turn22 ntpd[730]: synchronisation lost Dec 3 20:12:15 turn22 ntpd[730]: synchronisation lost Dec 3 22:50:40 turn22 ntpd[730]: synchronisation lost Dec 3 23:01:18 turn22 ntpd[730]: synchronisation lost
- the program 'check_time' (attached) which was once posted by R. Johnson on this list shows that the internal timekeeping is inconsistent:
Time = 3dedf443 Last = 3dedf440 Time = 3dedf440 Last = 3dedf443 Time = 3dedf443 Last = 3dedf440 Time = 3dedf440 Last = 3dedf443 Time = 3dedf443 Last = 3dedf440 Time = 3dedf440 Last = 3dedf443 Time = 3dedf443 Last = 3dedf440 Time = 3dedf440
Any ideas? Am I really the only one who has seen these problems (on 4 identical machines, BTW)?
Kay -- Kay Diederichs http://strucbio.biologie.uni-konstanz.de/~kay email: Kay.Diederichs@uni-konstanz.de Tel +49 7531 88 4049 Fax 3183 When replying to my email, please remove the blanks before and after the "@" ! Fakultaet fuer Biologie, Universitaet Konstanz, Box M656, D-78457 Konstanz#include <stdio.h> #include <time.h>
int main() { time_t tim; time_t last; (void)time(&last); (void)time(&tim); for(;;) { (void)time(&tim); if(tim != last) { if((last +1) != tim) { fprintf(stderr,"Time = %08lx\n", tim); fprintf(stderr,"Last = %08lx\n", last); } last = tim; } } }
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