[Lxc-users] Dreadful network performance, only to host from container

[Daniel Lezcano]

On 05/27/2010 10:21 AM, Toby Corkindale wrote:
> On 27/05/10 18:06, atp wrote:
> As requested:
>
>
>    
>> ifconfig br0 from the host
>>      
> br0       Link encap:Ethernet  HWaddr 00:1e:37:4d:8c:d8
>             inet addr:192.168.1.206  Bcast:192.168.1.255  Mask:255.255.255.0
>             inet6 addr: fe80::21e:37ff:fe4d:8cd8/64 Scope:Link
>             UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>             RX packets:3867723 errors:0 dropped:0 overruns:0 frame:0
>             TX packets:1849343 errors:0 dropped:0 overruns:0 carrier:0
>             collisions:0 txqueuelen:0
>             RX bytes:3451303555 (3.4 GB)  TX bytes:382610461 (382.6 MB)
>    

Can you give the routes of the host please ?

>> ifconfig eth0 from the container
>>      
> eth0      Link encap:Ethernet  HWaddr 36:d1:4f:d9:51:59
>             inet addr:192.168.1.88  Bcast:192.168.1.255  Mask:255.255.255.0
>             inet6 addr: fe80::34d1:4fff:fed9:5159/64 Scope:Link
>             UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>             RX packets:1416 errors:0 dropped:0 overruns:0 frame:0
>             TX packets:495 errors:0 dropped:0 overruns:0 carrier:0
>             collisions:0 txqueuelen:1000
>             RX bytes:1020033 (1.0 MB)  TX bytes:37512 (37.5 KB)
>
>
>
>    
>> and the version of lxc you're using.
>>      
> It's close to the git head, master branch.
> Last commit was 0093bb8ced5784468daf8e66783e6be3782e8fea on May 18th.
> (The version that originally shipped with ubuntu was giving me errors
> about not being able to pivot_root)
>
>    
>> Do you have anything special with
>> the /etc/sysctl.conf?
>>      
> I think these came with the system, are they likely to be problematic?
>
> net.ipv4.conf.default.rp_filter=1
> net.ipv4.conf.all.rp_filter=1
> net.ipv4.tcp_syncookies=1
> vm.mmap_min_addr = 65536
> fs.inotify.max_user_watches = 524288
> kernel.shmmax = 38821888
>
>
>
>    
>> On a completely blank container with no tuning, I get with scp;
>>
>> host->container squashfs.img 100% 639MB 33.6MB/s 00:19
>> container->host squashfs.img 100% 639MB 29.0MB/s 00:22
>>
>> Both tests inside the container. The limiting resource here is cpu for the
>> encryption.
>>      
> mm, yeah, I'd be waiting all week to copy an equivalently sized file
> like that. Although if i copy it to another host on the network, then
> back again, it's all fine :/
>
>    
>> I'm on kernel 2.6.34/fc12 for this.
>>      
> I'm on 2.6.32-22/ubuntu 10.04
>
>
> thanks,
> Toby
>
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