Re: [dpdk-dev] random pkt generator PMD

[Panu Matilainen <pmatilai@redhat.com>]

On 06/15/2016 02:10 PM, Yerden Zhumabekov wrote:
>
>
> On 15.06.2016 16:43, Dumitrescu, Cristian wrote:
>>
>>> -----Original Message-----
>>> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Yerden
>>> Zhumabekov
>>> Sent: Wednesday, June 15, 2016 10:44 AM
>>> To: dev@dpdk.org
>>> Subject: [dpdk-dev] random pkt generator PMD
>>>
>>> Hello everybody,
>>>
>>> DPDK already got a number of PMDs for various eth devices, it even has
>>> PMD emulations for backends such as pcap, sw rings etc.
>>>
>>> I've been thinking about the idea of having PMD which would generate
>>> mbufs on the fly in some randomized fashion. This would serve goals
>>> like, for example:
>>>
>>> 1) running tests for applications with network processing capabilities
>>> without additional software packet generators;
>>> 2) making performance measurements with no hw inteference;
>>> 3) ability to run without root privileges, --no-pci, --no-huge, for CI
>>> build, so on.
>>>
>>> Maybe there's no such need, and these goals may be achieved by other
>>> means and this idea is flawed? Any thoughts?
>> How about a Perl/Python script to generate a PCAP file with random
>> packets and then feed the PCAP file to the PCAP PMD?
>>
>> Random can mean different requirements for different
>> users/application, I think it is difficult to fit this  under a simple
>> generic API. Customizing the script for different requirements if a
>> far better option in my opinion.
>
> AFAIK, the thing about pcap pmd is that one needs to rewind pcap file
> once pcap pmd reaches its end. It requires additional (non-generic)
> handling in app code.

So add a loop-mode to pcap pmd?

	- Panu -