[Click] HELP:ToDevice element too slow, what's the problem???????

[shule ney]

I may find the solution, so how to adjust the CPU portion between the
click's kernel thread and the original Linux, I want kernel click to be
scheduled more frequently than linux, to the maximum.  Thank you guys.


2011/9/29 shule ney <neyshule at gmail.com>

> Hi all:
> I got a weird problem when I'm using udpgen.click, below is my
> udpgen.click:
>
> // UDPGen($device, $rate, $limit, $seth, $sip, $sport, $deth, $dip, $dport);
> //
> //	$device		name of device to generate traffic on
> //	$rate		rate to generate traffic (packets/s)
>
> //	$limit		total number of packets to send
> //      $size		bytes per packet
> //	$seth		source eth addr
> //	$sip		source ip addr
> //	$sport		source port
> //      $deth		destination eth addr
> //	$dip		destination ip addr
>
> //	$dport		destination port
>
> elementclass UDPGen {
>   $device, $rate, $limit, $size,
>   $seth, $sip, $sport, $deth, $dip, $dport |
>
>   source :: FastUDPSource($rate, $limit, $size, $seth, $sip, $sport,
>
>                                                 $deth, $dip, $dport);
>  * //**pd :: PollDevice($device) -> ToHost;* //commented out
>
>   source -> td :: ToDevice($device);
> }
>
> // create a UDPGen
>
> u :: UDPGen(eth1, 1800000, 8200000, 64,
> 	    00:e0:29:05:e2:d4, 2.0.0.2, 1234,
> 	    00:c0:95:e2:09:14, 1.0.0.2, 1234
>
> and when I start it, I got messages as below:
> *ToDevice eth1 is full, packet delayed*
> and when I check the calls in todevice,it shows:
> 1172 packets held
> 0 packets dropped
> 92828616 hard start xmit
> 1212233322 device busy returns
> 92827444 packets sent
> 1214691606 calls to run_task()
> 92828656 pulls
>
> The sending speed is only about 750Kpps, I remember before is around
> 1.7Mpps(I reformatted the disk and reinstall Linux). So what could be the
> problem??Thanks very much for your help, I'll appreciate it.
>
> Best
> shule
>