[Click] Click performance

[Douglas S. J. De Couto]

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On 4 Apr 2004, at 22:44, Eddie Kohler wrote:

> Doug lovely, will you send to Click mailing list also please??
> XOXO
>
> On Apr 4, 2004, at 6:56 PM, Douglas S. J. De Couto wrote:
>
>> the attached script calculates various 802.11b maximum throughputs at 
>> different bitrates.  it doesn't handle `short preambles' and other 
>> 802.11b optimizations, but at least gives an idea of how to go about 
>> these calculations.
>>
>> <tput.16258DEFANGED-pl>
>>
>>
>> On 4 Apr 2004, at 21:49, Robert Morris wrote:
>>
>>> 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
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> click mailing list
>>>> click at amsterdam.lcs.mit.edu
>>>> https://amsterdam.lcs.mit.edu/mailman/listinfo/click
>>>
>>> _______________________________________________
>>> click mailing list
>>> click at amsterdam.lcs.mit.edu
>>> https://amsterdam.lcs.mit.edu/mailman/listinfo/click
>>>
>> --
>> Douglas S. J. De Couto    <decouto at csail.mit.edu>
>
>
--
Douglas S. J. De Couto    <decouto at csail.mit.edu>