Re: [RTnet-developers] Problem in SOCK_RAW

[Jorge A. <j-a...@cr...>]

Em Ter=C3=A7a, 19 de Setembro de 2006 16:50, escreveu:
> Jorge Almeida wrote:
> > Hello to all,
> >=20
> > I'm testing the SOCK_RAW functionality in the rtnet framework for long =
periods of time and a problem is happening.
> > I will try to describe it:
> >=20
> > I'm making tests sending 1.000.000 (one milion messages), with an inter=
val of 5 ms each.
> > After some time, more than 100.000 messages, the host were the test is =
running has a strange behaviour, the program does not return but the bash d=
ies. I must make the login phase again to enter the host.
> > The messages stop of being sent (I'm monitoring the network with ethere=
al).
> >=20
> > In the /proc i find some data about the file descriptor used by the soc=
ket (/proc/rtai/rtdm/open_fildes)
> > Index   Locked   Device
> > 0         0            PACKET_RAW
> >=20
> > I think this is OK because the socket was never closed.
>=20
> Because the sender somehow died I think. But why does the console also
> die? That's not a typical program error. Anything on the kernel console?

In attach follows the messages file for one session where the problem happe=
ns

>=20
> >=20
> > But the behaviour is strange.
> > My guess is that this problem is due to some kind of semaphore or any s=
ynchronization mechanism.
>=20
> The guess is based on which information?
Because it only happens in a very high number of messages and not in a smal=
l number. Maybe a variable that overflows or anything like that.
>=20
> >=20
> >=20
> > Any clues for wath is happening?
>=20
> Nope.
>=20
> If there are no signs anywhere, I would first try to run your scenario
> over a similar time using some vanilla RTnet version with normal packet
> sockets. Have you tried this before? Just to exclude that there are
> major stability issues.

I've tested with SOCK_DGRAM two times, one OK the other the same problem. I=
'm doing some more tests with SOCK_DGRAM.

>=20
> BTW, you are on RTAI? What version, patch, gcc?
I'm using RTAI 3.4 test1, with gcc-4.1.0, with patch HAL IPIPE-NOTHREADS 1.=
3-08

I'm gonna try with rtai 3.4 now.
>=20
> Jan
>=20
>=20

=2D-=20
Jorge Almeida
j-a...@cr...

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