On Mon, Aug 5, 2013 at 10:27 AM, Jan Kiszka <jan.kis...@siemens.com> wrote:
> On 2013-08-05 10:08, Sebastian Hölzer wrote:
> > Hi
> >
> > I'm trying to configure a Realtime Master-Slave Network.
> > I am using linux 2.6.32.11, rtai 3.9.1, rtnet 0.9.13 on two similar
> > machines.
> >
> > If I type in "rtnet start" i get the following output
> > "rt_e1000e: Failed to initialize MSI-X interrupts. Falling back to MSI
> > interrupts."
> > on both the Master and the Slave.
> >
> > If i try to Ping the Slave i get the folling output
> > "ioctl: No route to host"
> > I can however ping the localhost without a problem.
> >
> > If i try to ping the master or the localhost from the slave the machine
> > prints
> > "ioctl: No buffer space available"
> >
> > If i type dmesg on the master it says
> > "TDMA: Failed to transmit sync frame!" multiple times while the output on
> > the slave seems to be ok.
> >
> > Please provide suggestions on how i can further narrow down the Problem.
>
> You are likely facing interrupt problems. The NIC is not getting any IRQ
> through, thus will quickly run out of TX buffers.
>
> Does the e1000e driver of Linux fall back to MSI as well? What does RTAI
> report about registered RT IRQs, is the NIC listed? You may try to force
> the NIC to use legacy INTx (module parameter IntMode=0), but that may
> also create IRQ conflicts with Linux devices.
>
> Jan
>
Thanks for your help!
Yes the e1000e driver also falls back to MSI and the NIC is listed.
I'm not sure what RTAI reports about registered RT IRQs.
Can you give me a hint on how to find out about the registered RT IRQs?
Is there a command to list all registered RT IRQs? or is this also listed
in dmesg?
How do I try to force the NIC to use legacy Interrupts?
I guess i have to load the driver modules like this. modprobe rt_e1000e
IntMode=0
Is this right?
Is this the right way to configure rtnet.conf if want to use the RTnet
script?
# RT-NIC driver
RT_DRIVER="rt_e1000e"
RT_DRIVER_OPTIONS="IntMode=0"
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