Displaying 20 results from an estimated 24 matches for "permitted_clock_jitt".
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permitted_clock_jitter
2006 Nov 13
0
/proc/sys/xen/permitted_clock_jitter
Hello to all,
I''ve noticed a value of 10000000
in /proc/sys/xen/permitted_clock_jitter.
I''m assuming thats only checked if independent_wallclock has a value
greater than 0.
Does anyone know what unit the 10000000 represents?
Thanks in advance
Tim
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Xen-users@lists.xensource.com
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2006 Nov 24
19
Time/clock issues with Xen 3.0.3?
The time appears to be perfect inside dom0, however all the domU''s
tend to have a slightly faster date which gets further out of sync
every day.
I''m currently using Xen 3.0.3 with Gentoo Linux, under 3.0.2 I had no
problems with domU clocks. Are there any known issues which could
cause this? I''d strongly prefer not to run ntpd in every domU,
having all domU clocks in
2007 Feb 06
2
real time clock drift
This must be documented somewhare but I checked the Xen 3.0 manual and
the word "clock" doesn''t even exist in it. I checked the FAQ as well.
I am running Xen 3.0.1 and an AMD64 CPU. I found that DOMUs time clock
drifts ahead. I installed ntpdate and it reports to change the time but
it does not.
David
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Xen-users mailing list
2008 Apr 22
0
guest clock
...Clock in guests drifts up to many days. Sometimes it happens after xendomains
service saves and restores state on reboot, sometimes not, sometimes it
happens when I am sleeping :). I use latest fedora 8 with latest updates (I
have had problem since fedora 6 ...) My proc settings:
/proc/sys/xen/permitted_clock_jitter is 10000000
/proc/sys/xen/independent_wallclock is 0
In hvm guest i tried localtime=0 and rtc_timeoffset=0 but nothing helps.
In paravirt. there is nothing to set ...
I want to use xen widely in my job but this problem is quite annoying and
can make serious damage so ...
I do not want to use ntp...
2008 Nov 19
1
domUs Clock synchronisation
...my domUs clocks go faster or slower
They come with the same OS (Centos 5 2.6.18-92.1.18.el5 ) but each of them
have a different clock speed.
Why? Dom0 does not syncronize domUs :
So i watched out looking for any solution....
First attempt:
/proc/sys/xen/independent_wallclock = 0
/proc/sys/xen/permitted_clock_jitter = 10000000
I tried weither disabling acpi and apic for domUs .
It didn''t work
Second attempt:
/proc/sys/xen/independent_wallclock = 0
ntpd on domUs .
It works but as the clocks run too fast after
a bunch of days it losts synchronization because
the drifts are too big.
More infos:...
2009 Jan 11
2
drifting clock in domUs
...mUs. The clock seems to drift away several seconds
up to two minutes from the dom0 clock.
We do have set independent_wallclock=0. According to the docs (i.e.
http://wiki.xensource.com/xenwiki/InstallationNotes) that way domUs
should use the dom0 clock, but apparently that''s not the case.
permitted_clock_jitter is set to 10000000.
did we miss anything, or is it still required to run an ntpd on the dom0?
and if this is the case, where do we find documentation about howto
setup both dom0 and domUs to use this ntpd for the system clock?
The dom0 runs the debian 2.6.26-1-xen-amd64 kernel with 3.2 xen util...
2007 Apr 18
33
[RFC PATCH 00/33] Xen i386 paravirtualization support
Unlike full virtualization in which the virtual machine provides
the same platform interface as running natively on the hardware,
paravirtualization requires modification to the guest operating system
to work with the platform interface provided by the hypervisor.
Xen was designed with performance in mind. Calls to the hypervisor
are minimized, batched if necessary, and non-critical codepaths
2007 Apr 18
34
[patch 00/34] Xen-pv_ops: Xen guest implementation for paravirt_ops interface
Hi Andi,
This patch series implements the Linux Xen guest as a paravirt_ops
backend. The features in implemented this patch series are:
* domU only
* UP and SMP guest support (NEW!)
* dynamic ticks (NEW!)
* writable pagetables, with late pinning/early unpinning
(no shadow pagetable support)
* supports both PAE and non-PAE modes
(non-PAE may be broken at the moment)
* xen hvc console
2007 Apr 18
34
[patch 00/34] Xen-pv_ops: Xen guest implementation for paravirt_ops interface
Hi Andi,
This patch series implements the Linux Xen guest as a paravirt_ops
backend. The features in implemented this patch series are:
* domU only
* UP and SMP guest support (NEW!)
* dynamic ticks (NEW!)
* writable pagetables, with late pinning/early unpinning
(no shadow pagetable support)
* supports both PAE and non-PAE modes
(non-PAE may be broken at the moment)
* xen hvc console
2007 Apr 18
34
[patch 00/34] Xen-pv_ops: Xen guest implementation for paravirt_ops interface
Hi Andi,
This patch series implements the Linux Xen guest as a paravirt_ops
backend. The features in implemented this patch series are:
* domU only
* UP and SMP guest support (NEW!)
* dynamic ticks (NEW!)
* writable pagetables, with late pinning/early unpinning
(no shadow pagetable support)
* supports both PAE and non-PAE modes
(non-PAE may be broken at the moment)
* xen hvc console
2007 Apr 18
43
[RFC PATCH 00/35] Xen i386 paravirtualization support
Unlike full virtualization in which the virtual machine provides
the same platform interface as running natively on the hardware,
paravirtualization requires modification to the guest operating system
to work with the platform interface provided by the hypervisor.
Xen was designed with performance in mind. Calls to the hypervisor
are minimized, batched if necessary, and non-critical codepaths
2007 Apr 18
43
[RFC PATCH 00/35] Xen i386 paravirtualization support
Unlike full virtualization in which the virtual machine provides
the same platform interface as running natively on the hardware,
paravirtualization requires modification to the guest operating system
to work with the platform interface provided by the hypervisor.
Xen was designed with performance in mind. Calls to the hypervisor
are minimized, batched if necessary, and non-critical codepaths
2007 Apr 18
20
[patch 00/20] XEN-paravirt: Xen guest implementation for paravirt_ops interface
This patch series implements the Linux Xen guest in terms of the
paravirt-ops interface. The features in implemented this patch series
are:
* domU only
* UP only (most code is SMP-safe, but there's no way to create a new vcpu)
* writable pagetables, with late pinning/early unpinning
(no shadow pagetable support)
* supports both PAE and non-PAE modes
* xen console
* virtual block
2007 Apr 18
20
[patch 00/20] XEN-paravirt: Xen guest implementation for paravirt_ops interface
This patch series implements the Linux Xen guest in terms of the
paravirt-ops interface. The features in implemented this patch series
are:
* domU only
* UP only (most code is SMP-safe, but there's no way to create a new vcpu)
* writable pagetables, with late pinning/early unpinning
(no shadow pagetable support)
* supports both PAE and non-PAE modes
* xen console
* virtual block
2007 Apr 18
20
[patch 00/20] XEN-paravirt: Xen guest implementation for paravirt_ops interface
This patch series implements the Linux Xen guest in terms of the
paravirt-ops interface. The features in implemented this patch series
are:
* domU only
* UP only (most code is SMP-safe, but there's no way to create a new vcpu)
* writable pagetables, with late pinning/early unpinning
(no shadow pagetable support)
* supports both PAE and non-PAE modes
* xen console
* virtual block
2007 Apr 18
24
[patch 00/24] Xen-paravirt_ops: Xen guest implementation for paravirt_ops interface
Hi Andi,
This patch series implements the Linux Xen guest as a paravirt_ops
backend. The features in implemented this patch series are:
* domU only
* UP only (most code is SMP-safe, but there's no way to create a new vcpu)
* writable pagetables, with late pinning/early unpinning
(no shadow pagetable support)
* supports both PAE and non-PAE modes
* xen hvc console (console=hvc0)
*
2007 Apr 18
24
[patch 00/24] Xen-paravirt_ops: Xen guest implementation for paravirt_ops interface
Hi Andi,
This patch series implements the Linux Xen guest as a paravirt_ops
backend. The features in implemented this patch series are:
* domU only
* UP only (most code is SMP-safe, but there's no way to create a new vcpu)
* writable pagetables, with late pinning/early unpinning
(no shadow pagetable support)
* supports both PAE and non-PAE modes
* xen hvc console (console=hvc0)
*
2007 Apr 18
24
[patch 00/24] Xen-paravirt_ops: Xen guest implementation for paravirt_ops interface
Hi Andi,
This patch series implements the Linux Xen guest as a paravirt_ops
backend. The features in implemented this patch series are:
* domU only
* UP only (most code is SMP-safe, but there's no way to create a new vcpu)
* writable pagetables, with late pinning/early unpinning
(no shadow pagetable support)
* supports both PAE and non-PAE modes
* xen hvc console (console=hvc0)
*
2007 Apr 18
25
[patch 00/21] Xen-paravirt: Xen guest implementation for paravirt_ops interface
Hi Andi,
This patch series implements the Linux Xen guest in terms of the
paravirt-ops interface. The features in implemented this patch series
are:
* domU only
* UP only (most code is SMP-safe, but there's no way to create a new vcpu)
* writable pagetables, with late pinning/early unpinning
(no shadow pagetable support)
* supports both PAE and non-PAE modes
* xen console
* virtual
2007 Apr 18
25
[patch 00/21] Xen-paravirt: Xen guest implementation for paravirt_ops interface
Hi Andi,
This patch series implements the Linux Xen guest in terms of the
paravirt-ops interface. The features in implemented this patch series
are:
* domU only
* UP only (most code is SMP-safe, but there's no way to create a new vcpu)
* writable pagetables, with late pinning/early unpinning
(no shadow pagetable support)
* supports both PAE and non-PAE modes
* xen console
* virtual