[Lxc-users] LXC and iperf: Why the difference between flows?

[Daniel Lezcano]

On 08/03/2010 07:53 PM, Nirmal Guhan wrote:
> On Tue, Aug 3, 2010 at 10:24 AM, Osvaldo Filho<arquivostcf at gmail.com>  wrote:
>    
>> Why have this difference?
>>
>> Client on container
>> [  3] local 192.168.6.10 port 58172 connected with 192.168.6.1 port 5001
>> [ ID] Interval       Transfer     Bandwidth
>> [  3]  0.0-60.0 sec  13.3 GBytes  1.90 Gbits/sec
>>
>> Client  on Host
>> [  3] local 192.168.6.1 port 46711 connected with 192.168.6.10 port 5001
>> [ ID] Interval       Transfer     Bandwidth
>> [  3]  0.0-60.5 sec  1.79 MBytes    248 Kbits/sec
>>      

Can you give a bit more informations please ?
eg. Is 192.168.1.1 another host on the network or the host running the 
container ?

> What is the TCP window size ? Can you share the iperf command as well
> ? I tried in Fedora 12 with 2.6.32.1090.fc12.i686 and seems to be ok.
>    

Right, MTU size maybe one issue:

https://lists.linux-foundation.org/pipermail/containers/2009-March/016355.html

TSO and SG maybe another:

http://www.mail-archive.com/lxc-users@lists.sourceforge.net/msg00386.html