[Click] Click performance

[Robert Morris]

Sheetal,

How fast can you send packets over the Orinoco cards without Click,
using the ordinary IP stack?

What packet size are you using?

If your wireless link runs at 1 megabit/second, you would only be able
to send 89 1400-byte packets per second.

It is also true that some 802.11 cards have very inefficient bus
interfaces (i.e. no DMA), though the limits we've seen are a few
hundred packets per second, not < 100.

Robert

> From: Sheetalkumar Doshi <Sheetalkumar.Doshi at colorado.edu>
> Date: Fri,  2 Apr 2004 10:36:10 -0700
> To: kohler at cs.ucla.edu
> Subject: [Click] Click performance
>
> Hi Eddie
>
> I'm a student at CU Boulder and I'm working on optimizing the DSR(
> Dynamic
> Source routing) protocol which runs on the click modular router. I'm
> running
> click at the userlevel and the click router runs on a 100Mhz 486 based
> Soerkis
> board. I'm using the Orinoco Wireless ethernet cards for the wireless
> ad-hoc
> routing.
>
> The problem is that I'm facing a huge drop in performance of the click
> router.
> I recall that you guys had obtained packet processing speed of around
> 435000
> packets per second on a P3 700Mhz. I can't even get to around 100
> packets per
> second on the board.  If I remove some queues from the click config
> file, I get
> marginally higher speeds. Do you know if any issues like slow boards,
> wireless
> ethernet card drivers, queues eating up processor time etc that could
> exist?
>
> I would really appreciate your thoughts about this problem.
>
>
> Thanks and Regards
>
> Sheetal
>
> --
> Sheetalkumar Doshi
> PhD Student/Research Assistant
> Dept. Of Electrical and Computer Engineering
> University of Colorado at Boulder
> http://ucsub.colorado.edu/~doshi
>
>
>
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