[Openvpn-devel] Packing small packets to a bigger packet

[<si...@p6...>]

Hi!

I see my openvpn handling a lot of small packets (around 100 bytes) at a
high rate. I have seen packing smaller packets into one bigger packet
suggested but the idea always rejected for various reasons.

Anyways, I made a little patch to do that (works agains 2.1rc4), and did
a couple of quick tests. I run 50 ping -i 0 -s 153 for 30 seconds,
observing CPU usage and made note of bytes transfered over the link. In
both cases, 18.7MB was pushed back and forth (pings, you know).

I looked at CPU usage with top, so it is a tad subjective measure, but
with multipacketing the cpu usage was mostly something like 10%-15%, but
without it more like 20% (I used UDP transport with TLS layer).

So it can probably give an advantage in some cases.

I submit the patch to your scrutiny

Siim Põder