On Wed, Jun 15, 2016 at 04:03:59PM +0600, Yerden Zhumabekov wrote: > On 15.06.2016 15:49, Bruce Richardson wrote: > >On Wed, Jun 15, 2016 at 03:43:56PM +0600, Yerden Zhumabekov wrote: > >>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? > >Isn't some of this already covered by the NULL PMD? Perhaps it could be > >extended > >or enhanced to meet some more of your requirements? > > > >/Bruce > Right, but development of various features regarding L3/L4 etc requires more > subtle approach, like live packets, different protocol versions, fields > manipulation. In this case some packet mangling/randomizing capabilities > would be quite useful. Something similar to what is done in Pktgen, but more > lightweight approach, in a same app. > > I've almost made my mind :) so the next question: is there any guide on PMD > dev? I'm looking through rte_ether.h right now, but some doc would be very > nice.
Unfortunately not. My suggestion is to take one of the simple vdev's e.g. ring, pcap, null, and work off a copy of it. /Bruce