[Click] print out queue size in my own element
Roman Chertov
rchertov at cs.ucsb.edu
Tue Feb 3 13:31:14 EST 2009
Eric,
You can use click_chatter() to print queue size; however, this will
result in poor performance at high packet rates and will flood your
syslog. The other approach would be to use a read handler to read the
queue size every so often.
Roman
Eric Sohn wrote:
> Hello,
>
> I would like to figure out how to print out the queue size.
> I implemented Queue(200) element in interface and want to print out the queue size during routing process using PrintQueueSize().
>
> Followings are my click configuration.
> Please let me know how I can get queue size of the interface.
> Thank you
>
> Eric
>
>
> // Shared IPv4 input path and routing table
>
> ip4 :: Strip(14)
> -> CheckIPHeader(INTERFACES 10.1.4.3/24 10.1.1.2/24 10.1.5.3/24)
> -> IPC :: IPClassifier(src 10.1.3.2/24 and dst 10.1.1.3/24, icmp, -);
> IPC[0]
> -> PrintQueueSize()
> -> rt4 :: LinearIPLookup(10.1.4.3/32 3, 10.1.1.2/32 3, 10.1.5.3/32 3);
> IPC[1]
> -> rt4 ;
> IPC[2]
> -> rt4 ;
>
>
> // ARP responses are copied to each ARPQuerier and the host.
>
> arpt :: Tee(4);
>
>
> // Input and output paths for eth2
>
> FromDevice(eth2) -> c0 :: Classifier(
> 12/0800, // [0] IPv4 packet
> 12/0806 20/0001, // [1] ARP request
> 12/0806 20/0002, // [2] ARP reply
> 12/86dd 20/3aff 54/87, // [3] IPv6 ICMP ND solicitation
> 12/86dd 20/3aff 54/88, // [4] IPv6 ICMP ND advertisment
> 12/86dd, // [5] IPv6 packet
> -) // [6] Unsupported protocol;
> out0 :: Queue(200) -> to_device0 :: ToDevice(eth2);
>
> // IPv4
> c0[0] -> Paint(1) -> ip4;
> c0[1] -> ARPResponder(10.1.4.3 0:4:23:b7:3f:96) -> out0;
> arpq0 :: ARPQuerier(10.1.4.3, 0:4:23:b7:3f:96) -> out0;
> c0[2] -> arpt;
> arpt[0] -> [1] arpq0;
>
> // Discard IPv6
> c0[5] -> Discard;
> c0[3] -> Discard;
> c0[4] -> Discard;
>
> // Unknown protocol
> c0[6] -> Print("eth2 unknown protocol") -> Discard;
>
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