[Click] Queue Capacity and RatedUnqueue

[Giovanni Giardinelli]

Hi Eddie, you wrote on 19/06/2004 6.18.50:


The reason for which I use the RatedUnque element is that, in a DiffServ
environment, I want to control the EF traffic, and at the same time I want to ensure
that this kind of traffic will be served at the RATE parameter fixed in the configuration 
of the RatedUnqueue element.
Moreover, also if I send at a rate much more low than 200,000 packets per second,  
I still observe this behavior.
Could be for the limits of my router in processing 64 bytes packets? 

Giovanni

>Giovanni,
>
>Do you still get drops with a simple "Unqueue" (not RatedUnqueue)?
>
>The rate on that RatedUnqueue is pretty slow: 200,000 packets per second.  It's 
>not surprising that your traffic generators can generate more load than that.
>
>Eddie
>
>
>
>Giovanni Giardinelli wrote:
>> Hi Eddie,
>> 
>> I use three ethernet Gbit
>> 
>> In order to generate packets, I use  the element FastUDPSource.
>> 
>> tester's configuration is the following:  
>> 
>> src2::FastUDPSource (204800,8192000,64,00:30:48:28:ba:28,192.168.10.145,
>> 1234,00:30:48:28:ba:ae,192.168.10.209,1234) 
>> -> SetIPDSCP(46)
>> -> ToDevice(eth2);
>> 
>> src3::FastUDPSource (20000,800000,64,00:30:48:28:ba:29,192.168.10.225,
>> 1234,00:30:48:28:ba:af,192.168.10.209,1234) 
>> -> SetIPDSCP(0)
>> -> ToDevice(eth3);
>> 
>> FromDevice(eth0) 
>> -> c0 :: Classifier(12/0806 20/0001,-);
>> 
>> c0[0] 
>> -> ar0 :: ARPResponder(192.168.10.209 00:07:e9:1f:b2:50)
>> -> SimpleQueue
>> -> ToDevice(eth0);
>> 
>> c0[1]
>> -> cf0:: Counter() 
>> -> Discard();
>> 
>> 
>> The principal part of the configuration of the Router is the following:  
>> 
>> c0 :: Classifier(12/0806 20/0001,
>>                   12/0806 20/0002,
>>                   12/0800,
>>                   -);
>> 
>> c2 :: Classifier(12/0806 20/0001,
>>                   12/0806 20/0002,
>>                   12/0800,
>>                   -);
>> 
>> c3 :: Classifier(12/0806 20/0001,
>>                   12/0806 20/0002,
>>                   12/0800,
>>                   -);
>> 
>> src0 :: PollDevice(eth0)
>> -> [0]c0;
>> src2 :: PollDevice(eth2) 
>> -> [0]c2;
>> src3 :: PollDevice(eth3) 
>> -> [0]c3;
>> 
>> .............
>> .............
>> .............
>> 
>> c2[2] 
>>       -> Paint(3) 
>>       -> Strip(14)
>>       -> CheckIPHeader(1.255.255.255)
>>       -> ipc2 :: IPClassifier(ip dscp 46, ip dscp 0); 
>> 
>> c3[2] 
>>       -> Paint(4) 
>>       -> Strip(14)
>>       -> CheckIPHeader(1.255.255.255)
>>       -> ipc3 :: IPClassifier(ip dscp 46, ip dscp 0);
>> 
>> qef :: SimpleQueue(32000);
>> 
>> ipc2[0] 
>> -> qef; 
>> 
>> qef
>> -> RatedUnqueue(204800) 
>> -> rt;
>> 
>> ...........
>> ...........
>> ...........
>> 
>> PokeHandlers( wait 5,
>>   read qef.length,
>>   read qef.droppes
>>   loop
>>   )
>> 
>> 
>> The qef.lenght=32000
>> 
>> the qef.droppes increases in continuation
>> 
>> 
>> 
>> Thanks
>> 
>> Giovanni
>> 
>> 
>> 
>> ----- Original Message ----- 
>> From: "Eddie Kohler" <kohler at CS.UCLA.EDU>
>> To: "Giovanni Giardinelli" <giovanni.giardinelli at tin.it>
>> Cc: <click at amsterdam.lcs.mit.edu>
>> Sent: Friday, June 18, 2004 11:04 PM
>> Subject: Re: [Click] Queue Capacity and RatedUnqueue
>> 
>> 
>> 
>>>Giovanni
>>>
>>>Please send a more complete configuration.  What are you using to 
>>>generate packets?
>>>
>>>
>>>Eddie
>>>
>>>On Jun 18, 2004, at 2:06 PM, Giovanni Giardinelli wrote:
>>>
>>>
>>>>Hi all,
>>>>I'm doing some tests for a simple router architecture which have to 
>>>>perform differentiated service between two kind of flows.
>>>>When I use a Queue element and a RatedUnqueue element in this way:
>>>>SimpleQueue(32000) -> RatedUnqueue(X), where X is a certain rate 
>>>>value, even if the tester emission rate is <=X, the queue
>>>>always overflow, causing a lot of packets to be dropped. I use 64 
>>>>bytes packets.
>>>>I have two question:
>>>>1) Why the click in my machine not allow me to fix a CAPACITY 
>>>>parameter value for the queue greater than 32000 packets?
>>>>2) Why the RatedUnqueue element seems to not work correctly?
>>>>
>>>>_______________________________________________
>>>>click mailing list
>>>>click at amsterdam.lcs.mit.edu
>>>>https://amsterdam.lcs.mit.edu/mailman/listinfo/click
>>>
>