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Message-ID: <85812f46-8822-fbc4-0ac1-f9a714661462@gmail.com> Date: Sat, 29 Apr 2017 14:50:15 -0600 From: David Ahern <dsahern@...il.com> To: Алексей Болдырев <ne-vlezay80@...dex.ru>, netdev <netdev@...r.kernel.org> Subject: Re: Low speed MPLS to virtio-net On 4/26/17 1:15 PM, Алексей Болдырев wrote: > Started MPLS on the branch - Everything was fine. When I tried to run MPLS on a real network of virtual machines, there were problems with the speed: > root@...tainers:~# iperf3 -c 10.194.10.2 -B 10.194.10.1 -Z > Connecting to host 10.194.10.2, port 5201 > [ 4] local 10.194.10.1 port 49533 connected to 10.194.10.2 port 5201 > [ ID] Interval Transfer Bandwidth Retr Cwnd > [ 4] 0.00-1.00 sec 1018 KBytes 8.34 Mbits/sec 238 5.64 KBytes > [ 4] 1.00-2.00 sec 1.42 MBytes 11.9 Mbits/sec 373 1.41 KBytes > [ 4] 2.00-3.00 sec 1.43 MBytes 12.0 Mbits/sec 379 5.64 KBytes > [ 4] 3.00-4.00 sec 1.43 MBytes 12.0 Mbits/sec 376 5.64 KBytes > [ 4] 4.00-5.00 sec 1.41 MBytes 11.8 Mbits/sec 375 2.82 KBytes > [ 4] 5.00-6.00 sec 1.42 MBytes 11.9 Mbits/sec 376 2.82 KBytes > [ 4] 6.00-7.00 sec 1.42 MBytes 11.9 Mbits/sec 373 5.64 KBytes > [ 4] 7.00-8.00 sec 1.41 MBytes 11.8 Mbits/sec 372 5.64 KBytes > [ 4] 8.00-9.00 sec 1.42 MBytes 11.9 Mbits/sec 379 2.82 KBytes > [ 4] 9.00-10.00 sec 1.42 MBytes 11.9 Mbits/sec 373 5.64 KBytes > - - - - - - - - - - - - - - - - - - - - - - - - - > [ ID] Interval Transfer Bandwidth Retr > [ 4] 0.00-10.00 sec 13.8 MBytes 11.5 Mbits/sec 3614 sender > [ 4] 0.00-10.00 sec 13.6 MBytes 11.4 Mbits/sec receiver A picture of your network topology is more helpful than dumping network config commands. For this topology: 10.10.10.10 +-----+ +-----+ +-----+ | VM1 |-------| VM2 |-------| VM3 | +-----+ +-----+ +-----+ push 100 pop 100 I get 4+ Gbps using netperf from VM1 to VM3: $ netperf -c -C -H 10.10.10.10 -l 10 -t TCP_STREAM MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 10.10.10.10 () port 0 AF_INET Recv Send Send Utilization Service Demand Socket Socket Message Elapsed Send Recv Send Recv Size Size Size Time Throughput local remote local remote bytes bytes bytes secs. 10^6bits/s % S % S us/KB us/KB 87380 16384 16384 10.01 4377.58 37.69 60.78 1.411 2.275 So your bandwidth above is really low. I suggest you confirm a good bandwidth without MPLS to make sure the VM config is proper.
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