Re: Strange network behaviour

Mike
2007-12-05T11:22:08Z

You can download the requested trace at
http://www.eliteserver.biz/trace.tar.gz

the peaks were around 12:04:30

Mike

Avi Kivity schrieb:
> Mike wrote:
>
>> Avi Kivity schrieb:
>>
>>
>>> Mike wrote:
>>>
>>>
>>>
>>>> Now I noticed a strange behaviour.
>>>> I have a gameserver running in a guest os. No problems on performance
>>>> side, really fast.
>>>> The only thing, when I make a ping test after unspecific time periods I
>>>> get this: (this peaks are even there if the gameserver isn't running)
>>>>
>>>>
>>>> As you can see, no peaks.
>>>> Example of start command from a guest:
>>>> kvm -hda apache.img -hdb apache_storage.img -m 512 -boot c -net
>>>> nic,vlan=0,macaddr=00:16:3e:00:00:01,model=rtl8139 -net tap -nographic
>>>> -daemonize
>>>>
>>>> Here the pings from the guest started with the command line listed above:
>>>>
>>>> Reply from 195.24.77.171: bytes=32 time=37ms TTL=57
>>>> Reply from 195.24.77.171: bytes=32 time=37ms TTL=57
>>>> Reply from 195.24.77.171: bytes=32 time=97ms TTL=57
>>>> Reply from 195.24.77.171: bytes=32 time=60ms TTL=57
>>>> Reply from 195.24.77.171: bytes=32 time=186ms TTL=57
>>>> Reply from 195.24.77.171: bytes=32 time=363ms TTL=57
>>>> Reply from 195.24.77.171: bytes=32 time=368ms TTL=57
>>>> Reply from 195.24.77.171: bytes=32 time=972ms TTL=57
>>>> Reply from 195.24.77.171: bytes=32 time=673ms TTL=57
>>>> Reply from 195.24.77.171: bytes=32 time=1133ms TTL=57
>>>> Reply from 195.24.77.171: bytes=32 time=1198ms TTL=57
>>>> Reply from 195.24.77.171: bytes=32 time=1881ms TTL=57
>>>> Reply from 195.24.77.171: bytes=32 time=2341ms TTL=57
>>>> Reply from 195.24.77.171: bytes=32 time=2401ms TTL=57
>>>>
>>>>
>>>>
>>>>
>>> What guest are you running?
>>>
>>> 'kvm' isn't the name of the binary generated by make. Are you sure it
>>> is actually the binary from kvm-55?
>>>
>>>
>>>
>>>
>> I'm running debian etch with kernel Linux 2.6.18-5-486 #1 Tue Oct 2
>> 23:38:54 UTC 2007 i686 GNU/Linux
>> as guest. All the guests are running this distr.
>> My kvm is pointing to /usr/local/bin/qemu-system-x86_64
>> 2007-12-04 15:29 /usr/local/bin/qemu-system-x86_64
>>
>>
>
> Ok. How long does it take for the latency to appear? If it isn't too
> long, please run kvm with
>
> strace -fF -ttT -o /tmp/trace kvm ...
>
> Note the time that latency appears so we can correlate with the logs.
> Be aware the logs can be quite large, so make sure you have some disk
> space ready.