[Netkit.users] First official release of Netkit-NG

[Julien Iguchi-Cartigny]

On 06/13/2014 02:16 PM, Saverio Proto wrote:
> I found the problem.
> 
> http://tldp.org/LDP/solrhe/Securing-Optimizing-Linux-RH-Edition-v1.3/chap6sec73.html
> 
> my home partition is NOT mounted with noatime
> 
> I just tried
> 
> chattr +A netkit-fs-i386-F7.0
> 
> saverio at nockid:~/netkit-ng/fs$ lsattr netkit-fs-i386-F7.0
> -------A-----e- netkit-fs-i386-F7.0
> saverio at nockid:~/netkit-ng/fs$
> 
> 
> I started a machine with -W (Cow mode) and it is very fast now.
> 
> I will make more detailed tests later, but this looks like to be the problem.

Ok I'm waiting your feedback then I will write a new test in check
configuration to avoid it again.

Thanks again for your precious help.

Julien

> Saverio
> 
> 
> 
> 2014-06-13 14:03 GMT+02:00 Saverio Proto <zioproto at gmail.com>:
>> I mean jbd2 is taking IO time on the host machine.
>>
>> Saverio
>>
>>
>> 2014-06-13 13:10 GMT+02:00 Julien Iguchi-Cartigny
>> <julien.iguchi-cartigny at lifl.fr>:
>>> On 06/13/2014 01:07 PM, Saverio Proto wrote:
>>>> Using iotop I see that the process that consumes all the IO time when
>>>> the UML machines are very slow is:
>>>>
>>>> jbd2/sdb1-8
>>>
>>> jbd2 is now used (it is a fs system). I will try to build new images
>>> this WE without it.
>>>
>>> Thanks for your feedback.
>>>
>>> J.
>>>
>>>
>>>> I have this process using 99.99% IO time
>>>>
>>>> This is when the UML kernel needs to perform a disk write operation
>>>>
>>>> Saverio
>>>>
>>>>
>>>> 2014-06-13 13:01 GMT+02:00 Saverio Proto <zioproto at gmail.com>:
>>>>>> Could you precise if it's the I/O or the CPU use which seems slow ?
>>>>>
>>>>> Hello,
>>>>> it is I/O problem. CPU is running low.
>>>>>
>>>>>> Could you describe your test computer architecture  (32/64 bits ?
>>>>>> distribution ?) ?
>>>>>
>>>>> saverio at nockid:~$ cat /etc/issue
>>>>> Ubuntu 12.04.4 LTS \n \l
>>>>>
>>>>> saverio at nockid:~$ uname -a
>>>>> Linux nockid 3.2.0-58-generic #88-Ubuntu SMP Tue Dec 3 17:37:58 UTC
>>>>> 2013 x86_64 x86_64 x86_64 GNU/Linux
>>>>> saverio at nockid:~$ cat /proc/cpuinfo | head
>>>>> processor    : 0
>>>>> vendor_id    : GenuineIntel
>>>>> cpu family    : 6
>>>>> model        : 42
>>>>> model name    : Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz
>>>>> stepping    : 7
>>>>> microcode    : 0x17
>>>>> cpu MHz        : 2400.000
>>>>> cache size    : 8192 KB
>>>>> physical id    : 0
>>>>> saverio at nockid:~$
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>>>
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