[Click] Using udpgen.click without polling device patch???

[shule ney]

Thanks for you reply Eddie, the problem is at first I used udpgen which can
sent 64B packet at about 1.3Mpps, but after I reinstall the linux on the
same machine, it can only achieve around 750Kpps which is not fast
enough(CPU=100%). I wonder where is the problem, the polling driver patch??
when I start udpgen I can see this "*ToDevice eth1 is full, packet delayed*
".

在 2011年9月28日 下午9:55，Eddie Kohler <kohler at cs.ucla.edu>写道：

> Hi Shule,
>
> 1. Use FromDevice instead of PollDevice. It will be slower, but might still
> be
> fast enough for you.
> 2. Yes, if you just leave the line in, I would expect 0 rate: the
> PollDevice
> does nothing.
>
> Eddie
>
>
> On 9/27/11 9:58 PM, shule ney wrote:
> > *HI all:*
> >    The udpgen.click is as below:
> >
> > // 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;*
> >    source ->  td :: ToDevice($device);
> > }
> >
> > // create a UDPGen
> >
> > u :: UDPGen(eth1, 82000, 820000, 1500,
> >           00:e0:29:05:e2:d4, 2.0.0.2, 1234,
> >           00:c0:95:e2:09:14, 1.0.0.2, 1234
> >
> > 1.So what does pd used for??? If I don't have polling device patch,
> > will it send much slower??
> >
> > 2.When I don't commented out this line， it also works, and the rate of
> > u is 0, is it common???
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>