Low Rate

[nedark]

I achieved to run a multipath tunnel for a OpenVPN connection.
However the rate is lower than expected. I'm using two paths. In any of the paths I got ~3 mbps without using mptunnel. However when using mptunnel I only get ~1 mbps.
Is this expected or something must be wrong?
Regards

[greensea]

Could you check your CPU usage? mptunnel is currently not optimized, so it may can't handle too many packets.
If you found CPU usage for mptunnel is 100%, that may be the problem. I can optimize the code later.

[zoobab]

Is it multithreaded or it stops at one core?

[greensea]

@zoobab It is multithreaded. What do you mean `stops at one core'?

[zoobab]

Good to know it is multithreaded. Otherwise, have you tested the performance between 2 machines with 2 network cards each? Could you do gigabit performance?

[greensea]

I don't have such network environment so I can't do it. But I guess it can
not handle gigabit network throughput unless you have a powerful CPU
2016年2月20日 下午10:18，"Benjamin Henrion" notifications@github.com写道：

Good to know it is multithreaded. Otherwise, have you tested the
performance between 2 machines with 2 network cards each? Could you do
gigabit performance?

—
Reply to this email directly or view it on GitHub
#3 (comment).

[zoobab]

If you don't have the hardware, just try with docker containers. Or with 2 laptops with gigabit ethernet in between...

[greensea]

I do the bench on my laptop, result below:

CPU: AMD Athlon(tm) II P320 Dual-Core

There are two process, each process attach to one CPU core. On the test, each process consume 50% CPU core time.

Traffic from mpclient to mpserver, 3 tunnels.

With encryption disabled I got 200Mbps rate, with encryption enabled, I got ~3Mbps rate.

Thant means I have to optimize the encryption function... I'll do it later

[zoobab]

For the encryption, I recommend using elliptic curve (nacl, tweetnacl) as they are very lightweight CPU-wise. I have tested for ex curvetun as a replacement for openvpn, and it beats it by far on performance.