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amina elbekkali

2009-Aug-12 11:26 UTC

[Xen-users] hi all..... probleme with clocksource

HI everybody, i wish you are all fine

I''m actually working in a project based on xen 3.2 wich was installed
in
debian lenny 5.0

afeter being installed (the hypervisor); i created a first virtual machine
and  things were going verry well still i rebooted the dom0 (the host); afet
that; the virtual machine shell display this strange and unending messages:


 5933.125364] clocksource/0: Time went backwards: ret=2ee31f49829
delta=-5892086159522 shadow=2ee2e490302 offset=3abce2e
[ 5933.125368] __ratelimit: 3750 messages suppressed
[ 5933.125368] clocksource/0: Time went backwards: ret=2ef5bfb10b8
delta=-5887086125075 shadow=2ef584efaba offset=3ac4ee1
[ 5933.125372] __ratelimit: 3750 messages suppressed
[ 5933.125372] clocksource/0: Time went backwards: ret=2f0860093fd
delta=-5882086153422 shadow=2f082551c87 offset=3abacf7
[ 5933.125376] __ratelimit: 3750 messages suppressed
[ 5933.125376] clocksource/0: Time went backwards: ret=2f1b006c737
delta=-5877086136724 shadow=2f1ac5b47ff offset=3abb52a
[ 5933.125380] __ratelimit: 3750 messages suppressed
[ 5933.125380] clocksource/0: Time went backwards: ret=2f2da0c691a
delta=-5872086157233 shadow=2f2d660c71e offset=3abd321
[ 5933.125383] __ratelimit: 3750 messages suppressed
[ 5933.125383] clocksource/0: Time went backwards: ret=2f40412b64a
delta=-5867086133889 shadow=2f40066b202 offset=3ac3d66

................................................

on the net, i found that the probleme can be solved; i should just follow
this tutorial:

http://tuttodebian.blogspot.com/2008/05/xen-clocksource0-time-went-backwards.html

unfortunately after this 4steps:

#cat /etc/sysctl.conf | grep xen
xen.independent_wallclock=1

# cat /sys/devices/system/clocksource/clocksource0/current_clocksource
xen

# cat /sys/devices/system/clocksource/clocksource0/available_clocksource
xen jiffies

# echo jiffies >
/sys/devices/system/clocksource/clocksource0/current_clocksource

i couldn''t find in the configuration file of the virtual machine the
line:

extra = ''xencons=tty clocksource=jiffies''

so the probleme still exist.

please if someone was once able to solve this problem. please post me the
solution i will be grateful.

regards


_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

SZABO Zsolt

2009-Aug-12 12:23 UTC

head link

Re: [Xen-users] hi all..... probleme with clocksource

On Wed, 12 Aug 2009, amina elbekkali wrote:
> HI everybody, i wish you are all fine
>
> I''m actually working in a project based on xen 3.2 wich was
installed in
> debian lenny 5.0
>
> afeter being installed (the hypervisor); i created a first virtual machine
> and  things were going verry well still i rebooted the dom0 (the host);
afet
> that; the virtual machine shell display this strange and unending messages:
>
>
> 5933.125364] clocksource/0: Time went backwards: ret=2ee31f49829
> delta=-5892086159522 shadow=2ee2e490302 offset=3abce2e
> [ 5933.125368] __ratelimit: 3750 messages suppressed
[...]

I have similar problem (xen 3.2.1 from debian lenny):
when rebooting, my_domU will be saved (by /etc/init.d/xendomains stop)
and after the reboot (/etc/init.d/xendomains start) the restored my_domU 
has this issue...

I tried manually "xm save my_domU ..." and "xm restore ..."
then only a few such lines were obtained:
[ 1317.621642] BUG: soft lockup - CPU#1 stuck for 245s! [swapper:0]
[ 1317.621642] Modules linked in: ipv6 reiserfs dm_mirror dm_log dm_snapshot
dm_mod raid1 md_mod thermal_sys
[ 1317.621642] CPU 1:
[ 1317.621642] Modules linked in: ipv6 reiserfs dm_mirror dm_log dm_snapshot
dm_mod raid1 md_mod thermal_sys
[ 1317.621642] Pid: 0, comm: swapper Not tainted 2.6.26-2-xen-amd64 #1
[ 1317.621642] RIP: e030:[<ffffffff802083aa>]  [<ffffffff802083aa>]
[ 1317.621642] RSP: e02b:ffff88017fc67f08  EFLAGS: 00000246
[ 1317.621642] RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff802083aa
[ 1317.621642] RDX: ffff88017fc67f20 RSI: 0000000000000000 RDI: 0000000000000001
[ 1317.621642] RBP: 0000000000000000 R08: 0000000000000000 R09: ffff880001bc15b8
[ 1317.621642] R10: ffff880081639000 R11: 0000000000000246 R12: 0000000000000000
[ 1317.621642] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 1317.621642] FS:  00007fae6c1686e0(0000) GS:ffffffff80539080(0000)
knlGS:0000000000000000
[ 1317.621642] CS:  e033 DS: 002b ES: 002b
[ 1317.621642] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1317.621642] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 1317.621642]
[ 1317.621642] Call Trace:
[ 1317.621642]  [<ffffffff80261217>] rcu_pending+0x26/0x50
[ 1317.621642]  [<ffffffff8020e795>] xen_safe_halt+0x90/0xa6
[ 1317.621642]  [<ffffffff8020a0c8>] xen_idle+0x2e/0x66
[ 1317.621642]  [<ffffffff80209cd6>] cpu_idle+0x97/0xb9
[ 1317.621642]
[ 1317.626161] BUG: soft lockup - CPU#0 stuck for 245s! [swapper:0]
[ 1317.626161] Modules linked in: ipv6 reiserfs dm_mirror dm_log dm_snapshot
dm_mod raid1 md_mod thermal_sys
[ 1317.626161] CPU 0:
[ 1317.626161] Modules linked in: ipv6 reiserfs dm_mirror dm_log dm_snapshot
dm_mod raid1 md_mod thermal_sys
[...]

but the domU seems to be OK.

--
Zsolt

# xm vcpu-list
Name                                ID  VCPU   CPU State   Time(s) CPU 
Affinity
Domain-0                             0     0     0   r--    2319.1 0
Domain-0                             0     1     -   --p      13.1 1
Domain-0                             0     2     -   --p      11.9 2
Domain-0                             0     3     -   --p      10.1 3
Domain-0                             0     4     -   --p      10.8 4
Domain-0                             0     5     -   --p      14.7 5
Domain-0                             0     6     -   --p      14.6 6
Domain-0                             0     7     -   --p      14.1 7
my_domU                             14     0     3   -b-      17.5 1-4
my_domU                             14     1     1   -b-       6.0 1-4
my_domU                             14     2     2   -b-       5.1 1-4
my_domU                             14     3     4   -b-       4.7 1-4

# xm dmesg
(XEN) Xen version 3.2-1 (Debian 3.2.1-2) (waldi@debian.org) (gcc version
4.3.1 (Debian 4.3.1-2) ) Sat Jun 28 09:32:18 UTC 2008
(XEN) Command line: console=vga dom0_mem=512M cpufreq=dom0-kernel acpi=on
numa=on
(XEN) Video information:
(XEN)  VGA is text mode 80x25, font 8x16
(XEN)  VBE/DDC methods: none; EDID transfer time: 0 seconds
(XEN)  EDID info not retrieved because no DDC retrieval method detected
(XEN) Disc information:
(XEN)  Found 6 MBR signatures
(XEN)  Found 6 EDD information structures
(XEN) Xen-e820 RAM map:
(XEN)  0000000000000000 - 000000000009b000 (usable)
(XEN)  000000000009b000 - 00000000000a0000 (reserved)
(XEN)  00000000000d2000 - 0000000000100000 (reserved)
(XEN)  0000000000100000 - 000000007ff90000 (usable)
(XEN)  000000007ff90000 - 000000007ff97000 (ACPI data)
(XEN)  000000007ff97000 - 0000000080000000 (ACPI NVS)
(XEN)  0000000080000000 - 00000000d1f00000 (usable)
(XEN)  00000000d1f00000 - 00000000d2000000 (reserved)
(XEN)  00000000e0000000 - 00000000f0000000 (reserved)
(XEN)  00000000fec00000 - 00000000fec10000 (reserved)
(XEN)  00000000fee00000 - 00000000fee01000 (reserved)
(XEN)  00000000fff80000 - 0000000100000000 (reserved)
(XEN)  0000000100000000 - 000000042e000000 (usable)
(XEN) System RAM: 16382MB (16775340kB)
(XEN) Xen heap: 14MB (14540kB)
(XEN) Reserving non-aligned node boundary @ mfn 1236992
(XEN) Reserving non-aligned node boundary @ mfn 2285568
(XEN) Reserving non-aligned node boundary @ mfn 3334144
(XEN) Domain heap initialised: DMA width 32 bits
(XEN) Processor #0 15:1 APIC version 16
(XEN) Processor #1 15:1 APIC version 16
(XEN) Processor #2 15:1 APIC version 16
(XEN) Processor #3 15:1 APIC version 16
(XEN) Processor #4 15:1 APIC version 16
(XEN) Processor #5 15:1 APIC version 16
(XEN) Processor #6 15:1 APIC version 16
(XEN) Processor #7 15:1 APIC version 16
(XEN) IOAPIC[0]: apic_id 8, version 17, address 0xfec00000, GSI 0-23
(XEN) Enabling APIC mode:  Flat.  Using 1 I/O APICs
(XEN) Using scheduler: SMP Credit Scheduler (credit)
(XEN) Detected 2813.014 MHz processor.
(XEN) AMD SVM: ASIDs disabled.
(XEN) HVM: SVM enabled
(XEN) CPU0: AMD Dual-Core AMD Opteron(tm) Processor 8220 stepping 03
(XEN) Booting processor 1/1 eip 8c000
(XEN) AMD: Disabling C1 Clock Ramping Node #0
(XEN) AMD: Disabling C1 Clock Ramping Node #1
(XEN) AMD: Disabling C1 Clock Ramping Node #2
(XEN) AMD: Disabling C1 Clock Ramping Node #3
(XEN) AMD SVM: ASIDs disabled.
(XEN) CPU1: AMD Dual-Core AMD Opteron(tm) Processor 8220 stepping 03
(XEN) Booting processor 2/2 eip 8c000
(XEN) AMD SVM: ASIDs disabled.
(XEN) CPU2: AMD Dual-Core AMD Opteron(tm) Processor 8220 stepping 03
(XEN) Booting processor 3/3 eip 8c000
(XEN) AMD SVM: ASIDs disabled.
(XEN) CPU3: AMD Dual-Core AMD Opteron(tm) Processor 8220 stepping 03
(XEN) Booting processor 4/4 eip 8c000
(XEN) AMD SVM: ASIDs disabled.
(XEN) CPU4: AMD Dual-Core AMD Opteron(tm) Processor 8220 stepping 03
(XEN) Booting processor 5/5 eip 8c000
(XEN) AMD SVM: ASIDs disabled.
(XEN) CPU5: AMD Dual-Core AMD Opteron(tm) Processor 8220 stepping 03
(XEN) Booting processor 6/6 eip 8c000
(XEN) AMD SVM: ASIDs disabled.
(XEN) CPU6: AMD Dual-Core AMD Opteron(tm) Processor 8220 stepping 03
(XEN) Booting processor 7/7 eip 8c000
(XEN) AMD SVM: ASIDs disabled.
(XEN) CPU7: AMD Dual-Core AMD Opteron(tm) Processor 8220 stepping 03
(XEN) Total of 8 processors activated.
(XEN) ENABLING IO-APIC IRQs
(XEN)  -> Using new ACK method
(XEN) Platform timer overflows in 234 jiffies.
(XEN) Platform timer is 3.579MHz ACPI PM Timer
(XEN) Brought up 8 CPUs
(XEN) AMD IOMMU: Disabled
(XEN) *** LOADING DOMAIN 0 ***
(XEN)  Xen  kernel: 64-bit, lsb, compat32
(XEN)  Dom0 kernel: 64-bit, lsb, paddr 0x200000 -> 0x631918
(XEN) PHYSICAL MEMORY ARRANGEMENT:
(XEN)  Dom0 alloc.:   0000000128000000->000000012a000000 (122880 pages to be
allocated)
(XEN) VIRTUAL MEMORY ARRANGEMENT:
(XEN)  Loaded kernel: ffffffff80200000->ffffffff80631918
(XEN)  Init. ramdisk: ffffffff80632000->ffffffff81bb6000
(XEN)  Phys-Mach map: ffffffff81bb6000->ffffffff81cb6000
(XEN)  Start info:    ffffffff81cb6000->ffffffff81cb64a4
(XEN)  Page tables:   ffffffff81cb7000->ffffffff81cca000
(XEN)  Boot stack:    ffffffff81cca000->ffffffff81ccb000
(XEN)  TOTAL:         ffffffff80000000->ffffffff82000000
(XEN)  ENTRY ADDRESS: ffffffff80200000
(XEN) Dom0 has maximum 8 VCPUs
(XEN) Initrd len 0x1584000, start at 0xffffffff80632000
(XEN) Scrubbing Free RAM:
......................................................
................................................................................
......................done.
(XEN) Xen trace buffers: disabled
(XEN) Std. Loglevel: Errors and warnings
(XEN) Guest Loglevel: Nothing (Rate-limited: Errors and warnings)
(XEN) Xen is relinquishing VGA console.
(XEN) *** Serial input -> DOM0 (type ''CTRL-a'' three times
to switch input to Xe$
(XEN) Freed 104kB init memory.

_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

Keith Coleman

2009-Aug-12 23:09 UTC

head link

Re: [Xen-users] hi all..... probleme with clocksource

On Wed, Aug 12, 2009 at 7:26 AM, amina elbekkali<aelbekkali@gmail.com>
wrote:> i couldn''t find in the configuration file of the virtual machine
the line:
>
> extra = ''xencons=tty clocksource=jiffies''
>
> so the probleme still exist.
>
If your config file doesn''t have the ''extra'' line
then add

extra = ''clocksource=jiffies''



Keith Coleman

_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

Gémes Géza

2009-Aug-13 05:31 UTC

head link

Re: [Xen-users] hi all..... probleme with clocksource

amina elbekkali írta:>
> HI everybody, i wish you are all fine
>
> I''m actually working in a project based on xen 3.2 wich was
installed
> in debian lenny 5.0
>
> afeter being installed (the hypervisor); i created a first virtual
> machine and  things were going verry well still i rebooted the dom0
> (the host); afet that; the virtual machine shell display this strange
> and unending messages:
>
>
>  5933.125364] clocksource/0: Time went backwards: ret=2ee31f49829
> delta=-5892086159522 shadow=2ee2e490302 offset=3abce2e
> [ 5933.125368] __ratelimit: 3750 messages suppressed
> [ 5933.125368] clocksource/0: Time went backwards: ret=2ef5bfb10b8
> delta=-5887086125075 shadow=2ef584efaba offset=3ac4ee1
> [ 5933.125372] __ratelimit: 3750 messages suppressed
> [ 5933.125372] clocksource/0: Time went backwards: ret=2f0860093fd
> delta=-5882086153422 shadow=2f082551c87 offset=3abacf7
> [ 5933.125376] __ratelimit: 3750 messages suppressed
> [ 5933.125376] clocksource/0: Time went backwards: ret=2f1b006c737
> delta=-5877086136724 shadow=2f1ac5b47ff offset=3abb52a
> [ 5933.125380] __ratelimit: 3750 messages suppressed
> [ 5933.125380] clocksource/0: Time went backwards: ret=2f2da0c691a
> delta=-5872086157233 shadow=2f2d660c71e offset=3abd321
> [ 5933.125383] __ratelimit: 3750 messages suppressed
> [ 5933.125383] clocksource/0: Time went backwards: ret=2f40412b64a
> delta=-5867086133889 shadow=2f40066b202 offset=3ac3d66
>
> ................................................
>
> on the net, i found that the probleme can be solved; i should just
> follow this tutorial:
>
>
http://tuttodebian.blogspot.com/2008/05/xen-clocksource0-time-went-backwards.html
>
> unfortunately after this 4steps:
>
> #cat /etc/sysctl.conf | grep xen
> xen.independent_wallclock=1
>
> # cat /sys/devices/system/clocksource/clocksource0/current_clocksource
> xen
>
> # cat /sys/devices/system/clocksource/clocksource0/available_clocksource
> xen jiffies
>
> # echo jiffies >
> /sys/devices/system/clocksource/clocksource0/current_clocksource
>
> i couldn''t find in the configuration file of the virtual machine
the line:
>
> extra = ''xencons=tty clocksource=jiffies''
>
> so the probleme still exist.
>
> please if someone was once able to solve this problem. please post me
> the solution i will be grateful.
>
> regards
> ------------------------------------------------------------------------
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-usersIf you are using pygrub to boot your DomU, then you should add every
configuration related to the DomU kernel, like clocksource=jiffies to
the kernel command line on your grub config file. Tipicaly on Debian
system it is: /boot/grub/menu.lst on the DomU.

Regards

Geza

_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

Xen users - Aug 2009 - hi all..... probleme with clocksource

[Xen-users] hi all..... probleme with clocksource

Re: [Xen-users] hi all..... probleme with clocksource

Re: [Xen-users] hi all..... probleme with clocksource

Re: [Xen-users] hi all..... probleme with clocksource