Speed Tests

[nonroker]

Hi,

I just did some speed tests with iperf to a server overseas.

With UDP I get 258kbits/sec
With TCP I get 129kbits/sec

I ran the tests 3 times each and it always comes down to those numbers...

I'm on the 256k package.
Are we being shafted here by the new bandwidth management system?

 

[Brolloks]

Question is: Is the new bandwidth management system working? How are they managing it?

 

[regardtv]

From the looks of things the new bwm is very much still in process ....

 

[nonroker]

My previous test results started to make me wonder.
So I setup the iperf server to run on my side, and connected to it from the other side. (The previous results was only sending speed ie. Uploads)

To my surprise I got 229 kbits/sec to my pc in UDP mode, but only got ACKs on 78% of the packets sent.
In TCP mode I got a shocking 38 kbits/sec!!! Even after I switched off Nagle's Algorithm (This is where TCP backs off when it gets packet loss)

My next test is now to setup a udp tunnel to the box overseas and check the results of these tests running across that tunnel.

 

[TheRoDent]

UDP cannot easily be bandwidth "managed" since there is no window, or acknowledgement process for bandwidth tools to interfere with. That's probably why you're getting the full speed on UDP.


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[nonroker]

Ok, here are the results....

I set up a UDP openvpn tunnel to the box and ran the test again.

This time I'm getting 80 kbits/sec on TCP to my box, and 220 kbits/sec from my box to the other box.

That's quite a big jump, still nowhere near 256k.
The openvpn overhead chows some of the bandwidth though...

One advantage of the openvpn tunnel is the optional lzo compression which gives a nice speed boost for web browsing (tested at 416 kbits/sec using iperf) []