Re: [CentOS] Xen clock drift

2008-01-09 Thread Luke Dudney
On 08/01/2008 15:15, Brian Mathis wrote: From: Jack Bailey [EMAIL PROTECTED] Date: Jan 8, 2008 3:17 AM To: centos@centos.org Hello All, Consider a CentOS-5.1 Xen server (2.6.18-53.1.4.el5xen) hosting two domains running CentOS-5.1 (2.6.18-53.1.4.el5). One domain has a fairly accurate clock,

Re: [CentOS] Xen clock drift

2008-01-09 Thread Akemi Yagi
On Jan 9, 2008 7:41 AM, Luke Dudney [EMAIL PROTECTED] wrote: At least, that is the theory. Empirically, using the vmware tools time sync feature will push a slow VM's clock forwards, but it won't push a fast clock backwards. I'm yet to see a best practice for ensuring proper time

Re: [CentOS] Xen clock drift

2008-01-09 Thread Jack Bailey
A note by Johnny Hughes in http://bugs.centos.org/view.php?id=2189 (comment 6644): As a side note ... if the clock GAINS (runs to fast) time you should be able to fix it with this: http://kb.vmware.com/kb/1591 (by setting the correct host.cpukHz) and vmware tools should adjust a clock that

Re: [CentOS] Xen clock drift

2008-01-09 Thread Akemi Yagi
On Jan 9, 2008 12:35 PM, Jack Bailey [EMAIL PROTECTED] wrote: A note by Johnny Hughes in http://bugs.centos.org/view.php?id=2189 (comment 6644): As a side note ... if the clock GAINS (runs to fast) time you should be able to fix it with this: http://kb.vmware.com/kb/1591 (by

[CentOS] Xen clock drift

2008-01-08 Thread Jack Bailey
Hello All, Consider a CentOS-5.1 Xen server (2.6.18-53.1.4.el5xen) hosting two domains running CentOS-5.1 (2.6.18-53.1.4.el5). One domain has a fairly accurate clock, the other domain has a clock that gains ungodly amounts of time, roughly one minute every two or three minutes. For a fix,

Re: [CentOS] Xen clock drift

2008-01-08 Thread Johnny Hughes
Rick Barnes wrote: Akemi Yagi wrote: On Jan 8, 2008 4:51 AM, Rick Barnes [EMAIL PROTECTED] wrote: Jack Bailey wrote: These domains are fully virtualized and set up identically, except badclock is allocated two processors versus one processor for goodclock. DomU's clock is running

Re: [CentOS] Xen clock drift

2008-01-08 Thread Akemi Yagi
On Jan 8, 2008 4:51 AM, Rick Barnes [EMAIL PROTECTED] wrote: Jack Bailey wrote: These domains are fully virtualized and set up identically, except badclock is allocated two processors versus one processor for goodclock. DomU's clock is running normally. Anyone know what's going or know

Re: [CentOS] Xen clock drift

2008-01-08 Thread Rick Barnes
Akemi Yagi wrote: On Jan 8, 2008 4:51 AM, Rick Barnes [EMAIL PROTECTED] wrote: Jack Bailey wrote: These domains are fully virtualized and set up identically, except badclock is allocated two processors versus one processor for goodclock. DomU's clock is running normally. Anyone know

Re: [CentOS] Xen clock drift

2008-01-08 Thread Akemi Yagi
On Jan 8, 2008 5:05 AM, Rick Barnes [EMAIL PROTECTED] wrote: Akemi Yagi wrote: On Jan 8, 2008 4:51 AM, Rick Barnes [EMAIL PROTECTED] wrote: Jack Bailey wrote: These domains are fully virtualized and set up identically, except badclock is allocated two processors versus one processor for

Re: [CentOS] Xen clock drift

2008-01-08 Thread Brian Mathis
From: Jack Bailey [EMAIL PROTECTED] Date: Jan 8, 2008 3:17 AM To: centos@centos.org Hello All, Consider a CentOS-5.1 Xen server (2.6.18-53.1.4.el5xen) hosting two domains running CentOS-5.1 (2.6.18-53.1.4.el5). One domain has a fairly accurate clock, the other domain has a clock that

Re: [CentOS] Xen clock drift

2008-01-08 Thread Jack Bailey
badclock# ksh ./xenclockdrift ntpd: time slew -0.000193s ntpd: time set -57.356377s ntpd: time slew +0.002352s ntpd: time slew +0.003018s ntpd: time set -57.417488s ntpd: time slew +0.012089s ntpd: time slew -0.000985s These domains are fully virtualized and set up identically, except badclock