[Click] safe vs srcr

[John Bicket]

Vaibhave Agarwal [vaibhave at cs.utah.edu] wrote:
>hi
>
>I was using gen_conf_safe.pl to generate safe.click, and was using that 
>to configure my wireless network and send one hop path packets.
>
>But the strange thing which i noticed was that when I use safe, 
>i get the ping latency of around "3 ms" between 2 nodes.
>
>But when I use srcr (roofnet.click), I get the latency around "1.3 ms".
>
>Also, both of these latencies are higher than the default latency 
>(without click) of around 1 ms.
>
>So my questions are:
>
>1) Why does safe has a higher latency than srcr?

Probably because srcr uses rate control but safe uses a static bitrate (1 mbps).

>
>2) Why both srcr and safe latency are higher than the default latency of 
>   1 ms ? Does click incurs an extra overhead ?

If you are running click at userlevel, the packet is copied to and
from userspace twice on both sides of the connection.  You shouldn't
really see much of a difference unless you're running this on slow
machines.

>
>
>thanks
>vaibhave
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