> Possible solutions: leave that context before socket(), set
> rtskb_cache_size on rtnet.ko loading, or already open the raw socket
> during application startup in non-RT context.
Creating the socket in soft_real_time solved that situation, but now i
have a different problem with the UDP socket.
The application should respond by the same ethernet interface it receive
the request. For that I use the value of struct sockaddr_ll.sll_ifindex
But the value I get from that field is 335544330. I'm reading from an
UDP socket.
Is this a known issue, a bug or something i'm doing wrong?
Thank you for your help!
Marcelo
Seg, 2007-01-15 às 18:11 +0100, Jan Kiszka escreveu:
> Marcelo Coelho wrote:
> > Hi!
> >
> >
> > I'm developing an application that uses rtai-3.4 (closure version) and
> > rtnet 0.9.8 (I've also tested rtnet 0.9.8), that uses two sockets of
> > different type: first, when the application is started, an UDP socket is
> > opened. Then, when a request of a certain type is received, an RAW
> > socket is opened just to send a reply.
> >
> > When my application tries to open the RAW socket, I get an error:
> > "RTnet: rtskb allocation from real-time cache failed."
> >
> > The error number that my application gets when opening the RAW socket is
> > -12 ("Out of memory").
> >
> >
> > Can't I open two sockets of different type in the same application?
>
> You can.
>
> > Where can I change the memory allocation size?
> >
>
> That memory for socket creation comes from the real-time skb cache (see
> README.pools) - which is empty by default. RTnet tries to use this pool
> instead of plain Linux allocations likely because you create the socket
> in hard-RT context.
>
> Possible solutions: leave that context before socket(), set
> rtskb_cache_size on rtnet.ko loading, or already open the raw socket
> during application startup in non-RT context.
>
> Jan
>
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