Re: [RFC PATCH wpan-next 1/2] ieee802154: hwsim: add replacement for fakelb

[Alexander Aring <aring@mojatatu.com>]

Hi,

On Thu, May 17, 2018 at 04:29:34PM -0400, Alexander Aring wrote:
> Hi,
> 
> On Mon, May 14, 2018 at 05:40:26PM +0200, Stefan Schmidt wrote:
> > Hello.
> > 
> > 
> > On 05/14/2018 04:29 PM, Alexander Aring wrote:
> > > Hi,
> > >
> > > On Fri, Apr 27, 2018 at 05:21:53PM -0400, Alexander Aring wrote:
> > >> This patch adds a new virtual driver mac802154_hwsim which is based on
> > >> the fakelb driver.
> > >> The fakelb driver will get deprecated and hopefully removed someday.
> > >> The main reason for doing this step is to rename the driver to
> > >> mac802154_hwsim to have a similar naming scheme as mac80211_hwsim,
> > >> which is more popular in the 802.11 wireless word and the idea is the
> > >> same behind this driver.
> > >>
> > >> The new features of this driver are to have knowledge about connected
> > >> edges, which can be changed during runtime. This offers a testing
> > >> environment for routing protocols e.g. RPL.
> > >> The default behaviour is still as fakelb: two radios connected to each
> > >> other. New added radios during runtime will not be connected to other
> > >> wpan_hwsim instances.
> > >>
> > >> The netlink api is not namespace aware on purpose, only the registered
> > >> wpan_phy's can be moved to namespaces. The physical layer according to
> > >> wiresless "air" communication can be handled across namespaces.
> > >>
> > >> Furthermore the edges can be weighted with the LQI value according IEEE
> > >> 802.15.4 which offers additional handling to mark bad or good connection
> > >> indicators to other connected virtual phys.
> > >>
> > >> Signed-off-by: Alexander Aring <aring@mojatatu.com>
> > > somebody (don't cc him, I think he don't want to be public) reported
> > > about issues with hwsim privetly. I will check on it and enable more
> > > kernel debugging stuff in kernel hacking feature to see all
> > > locking/stack issues.
> > 
> > The positive side is that it got some more testing and you got some problems reported. :-)
> > 
> 
> My test case is:
> 
> while true;do wpan-hwsim edge del 0 1; sleep 1; wpan-hwsim edge add 0 1;sleep 1;done
> 

forget the sleep here, better without so add/del edge so fast as
possible while traffic send.

traffic send can be replaced by iperf or netperf.

- Alex