[Click] Re: Re: packet loss

[Shilpi Agarwal]

Hi,

I think first thing you should do is to try a very simple configuration..

like:

PollDevice(eth1)
->Counter
->Idle
->ToDevice(eth2);

PollDevice(eth2)
->Counter
->IDle
->ToDevice(eth1);

And see if you get the same loss. Have u made sure that there is no extra 
traffic in the system. What is the hardware of your machine?

Shilpi



Quoting zhengchuanbo <zhengcb at netpower.com.cn>:

> hi,
> 	
> 	my click configuration is as follows. i tried FromDevice and 
PollDevice, 
> and Idle which is metioned on the mailing list.
> 	my experimental setup is simple. i use smartbit6000B,with 
smartapplication.
> 64Byte packets are sent to one NIC, and smartbits count the number of packets
> 
> received from the other NIC. i tried both uni-direction and bi-direction. in
> both
> conditions it always lost several packets,until the rate is reduced to
> 15kpps.
> 	
> 
> //FromDevice(eth2) -> c0 :: Classifier(12/0806 20/0001,
> PollDevice(eth2) -> c0 :: Classifier(12/0806 20/0001,
>                                      12/0806 20/0002,
>                                      12/0800,
>                                      -);
> FromDevice(eth3) -> c1 :: Classifier(12/0806 20/0001,
>                                      12/0806 20/0002,
>                                      12/0800,
>                                      -);
> 
> out :: Queue(1024) -> ToDevice(eth3);
> //out :: Queue(2048) -> ToDevice(eth3,80);
> out2 :: Queue(1024) -> ToDevice(eth2);
> 
> // ARP request need to be answered, obviously
> c0[0]
>     -> Print(ok-arprequest)
>     -> ARPResponder(7.0.0.1 00:C0:95:E1:FC:D6)
>     -> out;
> c1[0]
>     -> Print(ok-arprequest)
>     -> ARPResponder(7.0.0.1 00:C0:95:E1:FC:D6)
>     -> out;
> 
> // ARP responses are handed to Linux
> c0[1]
>     -> Print(ok-tohost)
>     -> ToHost();
> c1[1]
>     -> Print(ok-tohost)
>     -> ToHost();
> 	
> 
> // Non-IP packets are dropped
> c0[3]
>     //-> Print(ok-noip)
>     -> out;
> c1[3]
> //    -> Print(ok-noip)
>     -> out2;
> 
> // Other IP packets. Split on UDP, TCP and rest
> c0[2]
>     -> Idle ->out;
> c1[2]
>     -> out2;
> 
> 
> 
> >Hi,
> >
> >I still have not figured out the solution and my problem is more strange..i
> have
> >two machines which are a bit different in hardware ..on one of those
> machines it
> >works and on other one does not. And my loss is due to receive buffer
> overruns
> >as indicated by ifconfig.I made sure that there as no traffic from other
> source
> >or on other interfaces by shutting done otehr interfaces but i just can not
> get
> >rid of that loss.
> >It will be really helpful if we could figure out the solution for that.
> >
> >What configuration are you using and what is your experimental setup..??
> >
> >Thanks
> >Shilpi
> >
> >
> >
> >
> >Quoting zhengchuanbo <zhengcb at netpower.com.cn>:
> >
> >> hi,Agarwal,
> >> 	
> >> 	i just found you mail on click mailing list. i met the same problem as
> >> yours.
> >> 	the NIC i used is PRO/1000,and i can't get all the packets when testing
> with
> >> smartbits.
> >> the system always lost several packets, until the rate is reduced to
> about
> >> 15k pps.
> >> 	have you found the reason? 
> >> 
> >> 	
> >> jack zheng	
> >> E-mail: zhengcb at netpower.com.cn 
> >> Http://www.netpower.com.cn
> >> 
> >> 
> >> 
> >> 
> >
> >
> >Shilpi Agarwal
> >Graduate Student
> >Dept of Electrical Engineering
> >University of Wisconsin 
> >Madison-53706
> >phone:608-233-3714
> 
> = = = = = = = = = = = = = = = = = = = =
> 			
> jack zheng
> zhengcb at netpower.com.cn
> http://www.netpower.com.cn
> 
> 
> 
> 


Shilpi Agarwal
Graduate Student
Dept of Electrical Engineering
University of Wisconsin 
Madison-53706
phone:608-233-3714