Multipath TCP for FreeBSD v0.4

[Nigel Williams]

Hi Nils,

On 11/07/14 20:24, Nils Beyer wrote:
> Hi Nigel,
>
> Nigel Williams wrote:
>> A new v0.4 patch is available at [1]. [...]
>
> Thanks a lot for publishing the latest patch. Already tried it on two phyiscal
> machines with directly connected NICs.
>

Great, thanks for testing it out.

> "iperf" looks nice:
> ===============================================================================
> #iperf -c 10.255.255.11 -i 1
> ------------------------------------------------------------
> Client connecting to 10.255.255.11, TCP port 5001
> TCP window size: 32.5 KByte (default)
> ------------------------------------------------------------
> [  3] local 10.255.255.10 port 40171 connected with 10.255.255.11 port 5001
> [ ID] Interval       Transfer     Bandwidth
> [  3]  0.0- 1.0 sec   167 MBytes  1.40 Gbits/sec
> [  3]  1.0- 2.0 sec   171 MBytes  1.43 Gbits/sec
> [  3]  2.0- 3.0 sec   171 MBytes  1.44 Gbits/sec
> [  3]  3.0- 4.0 sec   171 MBytes  1.44 Gbits/sec
> [  3]  4.0- 5.0 sec   171 MBytes  1.44 Gbits/sec
> [  3]  5.0- 6.0 sec   169 MBytes  1.41 Gbits/sec
> [  3]  6.0- 7.0 sec   168 MBytes  1.41 Gbits/sec
> [  3]  7.0- 8.0 sec   169 MBytes  1.41 Gbits/sec
> [  3]  8.0- 9.0 sec   168 MBytes  1.41 Gbits/sec
> [  3]  9.0-10.0 sec   171 MBytes  1.43 Gbits/sec
> [  3]  0.0-10.0 sec  1.66 GBytes  1.42 Gbits/sec
> ===============================================================================
>
> TCP networking is rather unstable after some "iperf" executions. So that new
> SSH connections aren't possible anymore.
>
> Everything more complex than "iperf" - like NFS and FTP usage - leads to a
> kernel panic (page fault).
>
> Do you want any crash dumps? If yes, where do you want them to be uploaded?
>

Yes, that would be helpful (I'll send you a link to a drop box). If you 
were able to email me the core text files that might also help.

>
> FWIW: I haven't set up any special routings or PF rules at all:
> ===============================================================================
> MPTCP1
> ------
> ifconfig_em1="10.255.255.10/8 -tso"
> ifconfig_em0="192.168.1.1/24 -tso"
> ifconfig_em2="192.168.2.1/24 -tso"
>
>
> MPTCP2
> ------
> ifconfig_em1="10.255.255.11/8 -tso"
> ifconfig_em0="192.168.1.2/24 -tso"
> ifconfig_em2="192.168.2.2/24 -tso"
> ===============================================================================
>
>

Okay, I'll set up something similar. Did you configure any other TCP 
sysctls?

cheers,
nigel

>
> Thanks for all your work and regards,
> Nils
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