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Re: [OpenNode-users] KVM Missing timer interrupts?
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From: <ope...@li...> - 2010-06-07 10:53:34
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Hi again,
Any idea on what to try? Could you reproduce this problem on your system?
Thank you
Julián J. Menéndez
On Thu, Jun 3, 2010 at 21:05, Julian J. M. <jul...@gm...> wrote:
> Hello,
>
> I've already rebooted with the new kernel, but i'm afraid the problem
> persists... The guest machine, seems to hang (I have the clock and the
> task manager open), and as soon as I generate network traffic, it
> speeds up until "apparent time" reaches "real time"...kind of weird.
>
> Test scenario:
>
> Host:
> Centos 5.4
> ovzkernel-2.6.18-194.3.1.el5.028stab069.6
> kmod-kvm-83-164.asys.8
> kvm-83-164.asys.8
>
> Guest:
> Windows XP SP3 guest, up to date.
> Network driver: e1000.
> 1 vCPU
> 1024Mb RAM
>
> Procedure:
> 1) Start the guest
> 2) Connect via RDP
> 3) Open the clock applet and the task manager
> 4) Wait a couple of minutes, until there is some time drift
> 5) From the HN, ping -f ip.of.guest and see the clock speed up _fast_
> until it reaches the current time.
>
> As I said, it seems as if the guest wasn't receiving timer interrupts
> at the rate needed (or at all). It's very noticable when it's idle and
> has no network traffic (only RDP traffic is forwarded to the guest).
>
> Hope that helps. Thank you.
> Julian J. M.
>
> On Thu, Jun 3, 2010 at 13:05, <ope...@li...> wrote:
>> Im hoping that after reboot when kvm and kernel versions match your
>> problem will go away perhaps - please let us know afterwards.
>>
>> ----------------------------------------------
>> Andres Toomsalu, an...@ac...
>>
>>
>>
>>
>> ope...@li... wrote:
>>> I mean that (because I first installed manually the kvm and kmod-kvm
>>> packages) i'm using kmod-kvm-83-164.asys.8, with ovhkernel ending in
>>> .5, (instead of .6). I know it was a mistake ;), more info below.
>>>
>>> While I'm waiting for reboot, I downloaded the XP VM to a local
>>> vanilla Centos5.4 server, and it doesn't show the slow clock problem.
>>> I'm hoping that the kernel upgrade resolves the issue.
>>>
>>>
>>>
>>> # uname -r
>>> 2.6.18-194.3.1.el5.028stab069.5
>>>
>>> Latest ovz kernel installed is
>>> ovzkernel-2.6.18-194.3.1.el5.028stab069.6 (but need to reboot to use
>>> it)
>>>
>>> # rpm -ql kmod-kvm
>>> /lib/modules/2.6.18-194.3.1.el5.028stab069.6/extra/kmod-kvm
>>> /lib/modules/2.6.18-194.3.1.el5.028stab069.6/extra/kmod-kvm/ksm.ko
>>> /lib/modules/2.6.18-194.3.1.el5.028stab069.6/extra/kmod-kvm/kvm-amd.ko
>>> /lib/modules/2.6.18-194.3.1.el5.028stab069.6/extra/kmod-kvm/kvm-intel.ko
>>> /lib/modules/2.6.18-194.3.1.el5.028stab069.6/extra/kmod-kvm/kvm.ko
>>>
>>> # modprobe -l | grep kvm
>>> /lib/modules/2.6.18-194.3.1.el5.028stab069.5/weak-updates/kmod-kvm/ksm.ko
>>> /lib/modules/2.6.18-194.3.1.el5.028stab069.5/weak-updates/kmod-kvm/kvm.ko
>>> /lib/modules/2.6.18-194.3.1.el5.028stab069.5/weak-updates/kmod-kvm/kvm-amd.ko
>>> /lib/modules/2.6.18-194.3.1.el5.028stab069.5/weak-updates/kmod-kvm/kvm-intel.ko
>>>
>>>
>>> Thanks for your help,
>>> Julián.
>>>
>>>
>>> On Thu, Jun 3, 2010 at 12:43, <ope...@li...> wrote:
>>>
>>>> What do you mean by:
>>>> "kvm is up to date, although not build specifically for the running
>>>> kernel" ?
>>>>
>>>> You must run correct version of opennode ovzkernel with specially build
>>>> kvm module for it - otherwise problems are quaranteed (we build kvm
>>>> module specially for every ovzkernel release).
>>>> So please enable opennode-test and do "yum update opennode" - as
>>>> opennode rpm has pre-set kernel and kvm module dependencys - so it
>>>> ensures that matching ovzkernel and opennode kvm module are both
>>>> installed. We provide ovzkernel through opennode repos - not loading it
>>>> directly from official openvz repo - this is intentional for delaying
>>>> kernel upgrades if we have not yet build kvm module for a new openvz kernel.
>>>>
>>>> Cheers,
>>>>
>>>> ----------------------------------------------
>>>> Andres Toomsalu, an...@ac...
>>>>
>>>>
>>>>
>>>>
>>>> ope...@li... wrote:
>>>>
>>>>> Hello Andres,
>>>>>
>>>>> I already use opennode-test, but it's true that I have to reboot to
>>>>> get latest ovzkernel (kvm is up to date, although not build
>>>>> specifically for the running kernel). I have 3 openvz ve's in
>>>>> production, so I'll have to wait until tonight to reboot the server.
>>>>>
>>>>> Thanks,
>>>>> Julián J. M.
>>>>>
>>>>> On Thu, Jun 3, 2010 at 11:38, <ope...@li...> wrote:
>>>>>
>>>>>
>>>>>> Hi Juilán,
>>>>>>
>>>>>> Please disable in /etc/yum.repos.d/opennode opennode repo and enable
>>>>>> opennode-test repo - then do yum update opennode and let it update to
>>>>>> newer ovzkernel and kvm module (and reboot system afterwords to load new
>>>>>> kernel) - see if it fixes your problems. But keep in mind that there can
>>>>>> be other problems with opennode-test repo package versions - so avoid it
>>>>>> doing on production servers.
>>>>>>
>>>>>> All the best,
>>>>>>
>>>>>> ----------------------------------------------
>>>>>> Andres Toomsalu, an...@ac...
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> ope...@li... wrote:
>>>>>>
>>>>>>
>>>>>>> Hello,
>>>>>>>
>>>>>>> I have a working OpenVZ installation, and recently installed the kvm
>>>>>>> packages from opennode. I managed to install 2 VMs, one with WinXP and
>>>>>>> another with Win2003, both 32bits.
>>>>>>>
>>>>>>> The problem is that the guests slows down when there is no network
>>>>>>> traffic, and recovers when I, for example, ping flood the guest IP
>>>>>>> address.
>>>>>>>
>>>>>>> I don't know the cause, but it would seem that the guest is not
>>>>>>> getting timer interrupts, and can only keep up when there is another
>>>>>>> source of interrupts (network traffic).
>>>>>>>
>>>>>>> Hardware Node:
>>>>>>>
>>>>>>> # cat /proc/cpuinfo
>>>>>>> processor : 0
>>>>>>> vendor_id : GenuineIntel
>>>>>>> cpu family : 6
>>>>>>> model : 23
>>>>>>> model name : Intel(R) Xeon(R) CPU E5405 @ 2.00GHz
>>>>>>> stepping : 10
>>>>>>> cpu MHz : 2000.028
>>>>>>> cache size : 6144 KB
>>>>>>> physical id : 0
>>>>>>> siblings : 4
>>>>>>> core id : 0
>>>>>>> cpu cores : 4
>>>>>>> apicid : 0
>>>>>>> fpu : yes
>>>>>>> fpu_exception : yes
>>>>>>> cpuid level : 13
>>>>>>> wp : yes
>>>>>>> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
>>>>>>> pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm
>>>>>>> constant_tsc pni monitor ds_cpl vmx tm2 ssse3 cx16 xtpr sse4_1 lahf_lm
>>>>>>> bogomips : 4000.05
>>>>>>> clflush size : 64
>>>>>>> cache_alignment : 64
>>>>>>> address sizes : 38 bits physical, 48 bits virtual
>>>>>>> power management:
>>>>>>>
>>>>>>> (There are 8 cores in total.)
>>>>>>>
>>>>>>> #uname -a
>>>>>>> Linux ns21xxxx.ovh.net 2.6.18-194.3.1.el5.028stab069.5 #1 SMP Tue May
>>>>>>> 18 17:48:31 MSD 2010 x86_64 x86_64 x86_64 GNU/Linux
>>>>>>>
>>>>>>> # rpm -qa | grep kvm
>>>>>>> etherboot-zroms-kvm-5.4.4-13.el5.centos
>>>>>>> kmod-kvm-83-164.asys.8
>>>>>>> kvm-83-164.asys.8
>>>>>>> kvm-qemu-img-83-164.asys.8
>>>>>>> kvm-tools-83-105.asys.22.4
>>>>>>>
>>>>>>> Guest xml config:
>>>>>>> <domain type='kvm'>
>>>>>>> <name>WinXP</name>
>>>>>>> <uuid>7f119fd1-bbf3-64f6-17d5-e5263b6a1502</uuid>
>>>>>>> <memory>1048576</memory>
>>>>>>> <currentMemory>1048576</currentMemory>
>>>>>>> <vcpu>1</vcpu>
>>>>>>> <os>
>>>>>>> <type arch='x86_64' machine='pc'>hvm</type>
>>>>>>> <boot dev='hd'/>
>>>>>>> </os>
>>>>>>> <features>
>>>>>>> <acpi/>
>>>>>>> <pae/>
>>>>>>> </features>
>>>>>>> <clock offset='localtime'/>
>>>>>>> <on_poweroff>destroy</on_poweroff>
>>>>>>> <on_reboot>restart</on_reboot>
>>>>>>> <on_crash>restart</on_crash>
>>>>>>> <devices>
>>>>>>> <emulator>/usr/libexec/qemu-kvm</emulator>
>>>>>>> [...] The rest is trivial, ide HD (raw image), ide cdrom, and e1000 network.
>>>>>>>
>>>>>>> I initially installed XP with 2 vCPU. Changed it to 1 after reading
>>>>>>> some posts regarding clock drifts... Didn't fix it, anyway.
>>>>>>>
>>>>>>>
>>>>>>> This is the cmd line:
>>>>>>> /usr/libexec/qemu-kvm -S -M pc -m 1024 -smp 1 -name WinXP -uuid
>>>>>>> 7f119fd1-bbf3-64f6-17d5-e5263b6a1502 -no-kvm-pit-reinjection -monitor
>>>>>>> pty -pidfile /var/run/libvirt/qemu//WinXP.pid -localtime -boot c
>>>>>>> -drive file=/home/KVM/WinXPVM.img,if=ide,index=0,boot=on,format=raw
>>>>>>> -drive file=/home/KVM/NetKVM-and-viostor.iso,if=ide,media=cdrom,index=2,format=raw
>>>>>>> -net nic,macaddr=52:54:00:6a:d4:af,vlan=0,model=e1000 -net
>>>>>>> tap,fd=15,script=,vlan=0,ifname=vnet0 -serial pty -parallel none -usb
>>>>>>> -vnc 127.0.0.1:0
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Any idea on why it is happening?
>>>>>>>
>>>>>>> Thanks in advance,
>>>>>>> Juilán J. M.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>> ------------------------------------------------------------------------------
>>>>>> ThinkGeek and WIRED's GeekDad team up for the Ultimate
>>>>>> GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the
>>>>>> lucky parental unit. See the prize list and enter to win:
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>>>>>> _______________________________________________
>>>>>> OpenNode-users mailing list
>>>>>> Ope...@li...
>>>>>> https://lists.sourceforge.net/lists/listinfo/opennode-users
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>> ------------------------------------------------------------------------------
>>>> ThinkGeek and WIRED's GeekDad team up for the Ultimate
>>>> GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the
>>>> lucky parental unit. See the prize list and enter to win:
>>>> http://p.sf.net/sfu/thinkgeek-promo
>>>> _______________________________________________
>>>> OpenNode-users mailing list
>>>> Ope...@li...
>>>> https://lists.sourceforge.net/lists/listinfo/opennode-users
>>>>
>>>>
>>>
>>>
>>>
>>>
>>
>> ------------------------------------------------------------------------------
>> ThinkGeek and WIRED's GeekDad team up for the Ultimate
>> GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the
>> lucky parental unit. See the prize list and enter to win:
>> http://p.sf.net/sfu/thinkgeek-promo
>> _______________________________________________
>> OpenNode-users mailing list
>> Ope...@li...
>> https://lists.sourceforge.net/lists/listinfo/opennode-users
>>
>
>
>
> --
> http://www.julianmenendez.es
>
--
http://www.julianmenendez.es
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