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Re: [Xen-users] xen-3.2.0 problems with time (and space)
| To: | cmisip@xxxxxxxxx |
|---|---|
| Subject: | Re: [Xen-users] xen-3.2.0 problems with time (and space) |
| From: | Massimo Mongardini <massimo.mongardini@xxxxxxxxx> |
| Date: | Mon, 23 Jun 2008 11:56:49 +0100 |
| Cc: | "\[STD\]Ein" <ein@xxxxxxxxxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Mon, 23 Jun 2008 04:22:50 -0700 |
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Christopher Isip wrote: I also created a 0-59/5 ntpdate cron and disabled ntp to workaround this issue, but I don't feel this is optimal for a production env.My solution was to set clock to jiffies, disable ntp for all domU's and just run a cron job for ntpdate. Maybe somebody else has a better solution.Chris It seems like that my 2.6.18.8-xen has jiffies as default clocksource cat /sys/devices/system/clocksource/clocksource0/current_clocksource jiffies I wonder if I should try any other clocksource: cat /sys/devices/system/clocksource/clocksource0/available_clocksource jiffies tsc pit I remember trying clock=pit while fighting for the same problem with vmware. xm dmesg shows this: (XEN) ENABLING IO-APIC IRQs (XEN) -> Using new ACK method (XEN) Platform timer overflows in 14998 jiffies. (XEN) Platform timer is 14.318MHz HPETIt would be interesting to understand to what extent this is affecting the community. (eg. Is it just me and my hardware?) I am aware that virtualization and clock ticks are hard to conciliate but since the IT trends are pushing so hard to promote virtualization now-a-days I personally feel that if it's not just me and few others, it is unacceptable for a production server to have the clock going berserk and having to apply workarounds that could not always be possible. cheers Massimo -- Massimo Mongardini ~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~ echo 'Jg!J!hjwf!zpv!bo!bqqmf!boe!zpv!hjwf!nf!bo!bqqmf-!uifo!xf!xjmm!ibwf!bo!bqqmf!fbdi/!Cvu!jg!J!hjwf!zpv!bo!jefb!boe!zpv!hjwf!nf!bo!jefb-!xf!xjmm!ibwf!uxp!jefbt!fbdi!' | perl -pe 's/(.)/chr(ord($1)-1)/ge' ~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~ http://massimo.mongardini.it http://www.getthefacts.it http://www.mongardini.it/pizza-howto ~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~-.-~ Please avoid sending me Word or PowerPoint attachments. See http://www.gnu.org/philosophy/no-word-attachments.html _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users |
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