[strongSwan] Strongswan 5.1.3: traffic processing spans to only one core in a multi-core environment

Shahreen Ahmed sahmed at adax.co.uk
Wed Jul 9 17:47:09 CEST 2014

Hi Martin,

In my setup I used AES-128 encryption with pre-shared key based 

On the following hashed mark point, can you please give me a bit more 
detail about how should we make the following into effect i,e enabling 
AES-NI or AES-GCM? Should we do it using ipsec.conf config files or we 
need something else?

AES-NI is quite powerful and should allow you to increase your
throughput. However, running AES in GCM mode is preferable, as using a
traditional HMAC integrity function could become the bottleneck



Shahreen Noor Ahmed
Network Support Department
Adax Europe Ltd
url: www.adax.com
e-mail: sahmed at adax.co.uk
Direct line: +44(0)118 952 2804

On 02/07/2014 10:56, Martin Willi wrote:
> Hi,
>> By stressing with traffic it seems I can achieve maximum 43% line rate
>> for larger Pkt size (1400b) and only 28% line rate for smaller packet
>> size (256b).
>> Looking at the top output it seems that only 1 core is occupied and
>> reaches to 100% of consumption.
> This is what to expect, and has been discussed a few times, for example
> at [1].
> Regards
> Martin
> [1]https://www.mail-archive.com/users@lists.strongswan.org/msg07386.html

More information about the Users mailing list