[ovs-discuss] Extremely slow tcp/udp connection ovs 2.6.1 , 4.4.0-87 Ubuntu 14.04

[kevin parrikar]

Hello All,
I am running OVS 2.6.1 on Ubuntu 14.04 kernel 4.4.0-87-generic with
Openstack Mitaka release with OVS firewall driver(contrack )


MTU is set to 9000 on both the physical nics and icmp is success with ping
-Mdo -s 8000 flag
how ever tcp and udp streams are too slow.

TCP

iperf -c 192.168.111.202
------------------------------------------------------------
Client connecting to 192.168.111.202, TCP port 5001
TCP window size: 92.6 KByte (default)
------------------------------------------------------------
[  3] local 192.168.111.199 port 44228 connected with 192.168.111.202 port
5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-927.7 sec   175 KBytes  1.54 Kbits/sec

UDP

iperf -s -u
------------------------------------------------------------
Server listening on UDP port 5001
Receiving 1470 byte datagrams
UDP buffer size:  122 KByte (default)
------------------------------------------------------------
[  3] local 192.168.111.202 port 5001 connected with 192.168.111.199 port
45028
[ ID] Interval       Transfer     Bandwidth        Jitter   Lost/Total
Datagrams
[  3]  0.0-10.0 sec  1.25 MBytes  1.05 Mbits/sec   0.086 ms    0/  893 (0%)

Any idea where could be the issue.

Regards,
Kevin
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