[wellylug] Latency

[jumbophut]

On 6/18/05, Rob Giltrap wrote:
> I want to do some testing on how network latency affects a Linux
> application I have.
> 
> Anyone have any easy ways to be able to add in some addtional latency in
> a controlled manner?
> 

This looks promising:
<http://www.cs.princeton.edu/~nakao/libipq.htm>

I've never used it, but how it _might_ work is:

1) Replace the ACCEPT target in the rules in your iptables
INPUT/OUTPUT chains with the QUEUE target

2) Use the sample code in the man page, adding in a useless loop which
runs enough times to inject the number of milliseconds you want (in
the block following 'case IPQM_PACKET:').

Somebody's probably done it -- or something very similar -- before. 
Google is your friend.

-- 
Tony (echo 'spend!,pocket awide' | sed 'y/acdeikospntw!, /l at omcgtjuba.phi/')