Very slow network speed using Tinc

[Guus Sliepen]

On Tue, Oct 22, 2013 at 03:38:20PM +0200, Dariusz Bączkowski wrote:

> I use standard tinc settings and tests look like this:
> tinc version 1.0.19 (built Apr 22 2013 21:45:37, protocol 17)
> [  6] local 10.71.0.15 port 37975 connected with 10.71.0.1 port 5001
> [ ID] Interval       Transfer     Bandwidth
> [  6]  0.0-10.0 sec   268 MBytes   224 Mbits/sec
> [  5] local 10.71.0.15 port 5001 connected with 10.71.0.1 port 47211
> [  5]  0.0-10.0 sec   246 MBytes   206 Mbits/sec
> 
> Without tinc:
> [  6] local 10.81.0.15 port 39846 connected with 10.81.0.1 port 5001
> [ ID] Interval       Transfer     Bandwidth
> [  6]  0.0-10.0 sec  1.10 GBytes   943 Mbits/sec
> [  5] local 10.81.0.15 port 5001 connected with 10.81.0.1 port 48362
> [  5]  0.0-10.0 sec  1.10 GBytes   941 Mbits/sec
> 
> This is better then in your case but I also was expecting more. Servers are 
> connected directly without switch. I suspect that problem is with CPU power 
> because tincd saturates one core to 100% in such transfers (Intel(R) Xeon(R) 
> CPU E5-2620 0 @ 2.00GHz).

The E5-2620 has AES instructions, you could try setting Cipher = aes-128-cbc. I
don't think you'd get more than 300 Mbit/s though, a big part of the CPU power
is actually spent doing SHA1 HMACs.

-- 
Met vriendelijke groet / with kind regards,
     Guus Sliepen <guus at tinc-vpn.org>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 198 bytes
Desc: Digital signature
URL: <http://www.tinc-vpn.org/pipermail/tinc/attachments/20131022/0907f531/attachment.sig>