mirror of https://github.com/dswd/vpncloud.git
Updated measurements done with current kernel and
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Dennis Schwerdel
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performance.md
128
performance.md
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@ -3,14 +3,19 @@ Performance Tests
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### Test setup
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Two nodes with:
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* 2x Intel(R) Xeon(R) CPU L5420
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* 16 GiB Ram
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* Intel Corporation 80003ES2LAN Gigabit Ethernet Controller (Kernel driver e1000e)
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* Debian Linux 7.0 (Kernel 2.6.32-26-pve)
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* Connected by Cisco Catalyst 4506 switch
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Sender node:
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* Intel(R) Core(TM) i5-2540M CPU @ 2.60GHz
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* 8 GiB Ram
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* Intel 82579LM Gigabit Network
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* Ubuntu 14.04 (Kernel 3.13.0-65-generic)
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VpnCloud version: `VpnCloud v0.1.0 (without crypto support, protocol version 1)`
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Receiver node:
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* Intel(R) Core(TM) i5-3450 CPU @ 3.10GHz
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* 16 GiB Ram
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* Realtek RTL8111/8168/8411 Gigabit Network
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* Ubuntu 14.04 (Kernel 3.13.0-63-generic)
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VpnCloud version: `VpnCloud v0.1.0 (with crypto support, protocol version 1)`
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### Test 1: Unencrypted throughput
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@ -40,11 +45,11 @@ $> iperf -c 10.2.1.2 -t 60
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```
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**Results:**
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* Throughput without VpnCloud: 938 Mbits/sec
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* Throughput via VpnCloud (MTU=1400): 461 Mbits/sec
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* CPU usage for VpnCloud (MTU=1400): maxed out at ~105% of one core
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* Throughput via VpnCloud (MTU=16384): 949 Mbits/sec (no idea why this is higher)
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* CPU usage for VpnCloud (MTU=16384): ~68% of one core
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* Throughput without VpnCloud: 926 Mbits/sec
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* Throughput via VpnCloud (MTU=1400): 885 Mbits/sec
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* CPU usage for VpnCloud (MTU=1400): ~85%/ ~95% of one core (sender, receiver)
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* Throughput via VpnCloud (MTU=16384): 947 Mbits/sec
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* CPU usage for VpnCloud (MTU=16384): ~40%/ ~45% of one core (sender, receiver)
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### Test 2: Unencrypted ping
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@ -63,29 +68,106 @@ $> ./vpncloud -t tap -l NODE2:3210 -c NODE1:3210 \
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Each test is first run without VpnCloud:
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```
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$> ping NODE2 -c 1000 -i 0.01 -s SIZE -U -q
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$> ping NODE2 -c 10000 -i 0.001 -s SIZE -U -q
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```
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and then with VpnCloud:
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```
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$> ping 10.2.1.2 -c 1000 -i 0.01 -s SIZE -U -q
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$> ping 10.2.1.2 -c 10000 -i 0.001 -s SIZE -U -q
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```
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For all the test, the best result out of 5 is selected.
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SIZE: 50 bytes
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* Without VpnCloud: Ø= 200 µs, stddev= 28 µs
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* With VpnCloud: Ø= 318 µs, stddev= 26 µs
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* Without VpnCloud: Ø= 164 µs
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* With VpnCloud: Ø= 433 µs
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SIZE: 500 bytes
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* Without VpnCloud: Ø= 235 µs, stddev= 29 µs
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* With VpnCloud: Ø= 351 µs, stddev= 26 µs
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* Without VpnCloud: Ø= 330 µs
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* With VpnCloud: Ø= 446 µs
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SIZE: 1400 bytes
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* Without VpnCloud: Ø= 303 µs, stddev= 32 µs
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* With VpnCloud: Ø= 421 µs, stddev= 31 µs
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SIZE: 1000 bytes
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* Without VpnCloud: Ø= 356 µs
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* With VpnCloud: Ø= 473 µs
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### Test 3: Encrypted throughput
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Node 1:
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```
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$> ./vpncloud -t tap -l NODE1:3210 -c NODE2:3210 \
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--ifup 'ifconfig $IFNAME 10.2.1.1/24 mtu MTU up' --shared-key test &
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```
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Node 2:
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```
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$> ./vpncloud -t tap -l NODE2:3210 -c NODE1:3210 \
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--ifup 'ifconfig $IFNAME 10.2.1.2/24 mtu MTU up' --shared-key test &
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$> iperf -s &
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$> top
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```
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First, the test is run **without VpnCloud**:
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```
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$> iperf -c NODE2 -t 60
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```
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and then **via VpnCloud**:
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```
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$> iperf -c 10.2.1.2 -t 60
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```
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**Results:**
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* Throughput without VpnCloud: 926 Mbits/sec
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* Throughput via VpnCloud (MTU=1400): 633 Mbits/sec
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* CPU usage for VpnCloud (MTU=1400): 100% of one core on both sides
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* Throughput via VpnCloud (MTU=16384): 918 Mbits/sec
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* CPU usage for VpnCloud (MTU=16384): ~90% of one core on both sides
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### Test 4: Encrypted ping
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Node 1:
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```
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$> ./vpncloud -t tap -l NODE1:3210 -c NODE2:3210 \
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--ifup 'ifconfig $IFNAME 10.2.1.1/24 mtu 1400 up' --shared-key test &
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```
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Node 2:
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```
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$> ./vpncloud -t tap -l NODE2:3210 -c NODE1:3210 \
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--ifup 'ifconfig $IFNAME 10.2.1.2/24 mtu 1400 up' --shared-key test &
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```
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Each test is first run without VpnCloud:
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```
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$> ping NODE2 -c 10000 -i 0.001 -s SIZE -U -q
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```
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and then with VpnCloud:
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```
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$> ping 10.2.1.2 -c 10000 -i 0.001 -s SIZE -U -q
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```
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For all the test, the best result out of 5 is selected.
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SIZE: 50 bytes
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* Without VpnCloud: Ø= 164 µs
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* With VpnCloud: Ø= 456 µs
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SIZE: 500 bytes
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* Without VpnCloud: Ø= 330 µs
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* With VpnCloud: Ø= 492 µs
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SIZE: 1000 bytes
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* Without VpnCloud: Ø= 356 µs
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* With VpnCloud: Ø= 543 µs
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### Conclusion
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* VpnCloud achieves about 460 MBit/s with default MTU settings.
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* At increased MTU, VpnCloud is able to saturate a Gigabit link.
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* VpnCloud achieves about 885 MBit/s with default MTU settings.
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* In encrypted mode, VpnCloud reaches aboud 663 MBit/s with default MTU settings.
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* At increased MTU, VpnCloud is able to saturate a Gigabit link even when encrypting.
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* VpnCloud adds about 120µs to the round trip times, i.e. 60µs latency increase.
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* Encryption adds an additional latency between 10µs and 35µs depending on the packet size.
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