RE: [RTnet-developers] Interrupt sharing realtime / non-realtime

[Zhang Y. <y.z...@st...>]

The most straightforward way:

Open your box, plug one NIC to another PCI slot. Keep on trying, until =
the
two use dfferent IRQ.

Yuchen

> -----Original Message-----
> From: rtn...@li...=20
> [mailto:rtn...@li...] On=20
> Behalf Of Klaus Keppler
> Sent: Thursday, August 04, 2005 11:20 AM
> To: rtn...@li...
> Subject: [RTnet-developers] Interrupt sharing realtime / non-realtime
>=20
> Hello,
>=20
> I'm actually porting drivers for RTnet (hope to tell you more=20
> in some days). But now I have a *real* problem...
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> In one of my development PCs are two NICs: one for "normal"
> ethernet operation, and one as the RTnet interface.
> (Different chipsets, different drivers)
> After several hours (days) of debugging I found out that my=20
> system hangs up when my new RTnet driver is enabled and a=20
> packet on the "normal" interface arrives. I looked into the=20
> PCI table and: yes, these two f*cking NICs share their=20
> interrupt request line (IRQ 10).
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> As I'm relative new to realtime development, I suppose that=20
> it's not possible to share an IRQ between realtime and=20
> non-realtime domains?
> Nevertheless I think that it's the job of Adeos to handle the=20
> interrupts, and when an IRQ 10 is raised, it should first be=20
> handled by RTAI and then (if remaining unhandled) by the=20
> "normal" linux... or not?
> However - I added debugging output to my new driver interrupt=20
> handler to see whenever an interrupt arrives; indeed only=20
> local interrupts of the new RTnet drivers are shown, but when=20
> my "killing" packet (from the normal NIC) arrives, the system=20
> hangs immediately.
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> Currently I'm using RTnet-0.8.3 and RTAI-3.2.
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> Any ideas?
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> Best regards,
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>     Klaus
>=20
> --
> Institut f=FCr Informatik
> Friedrich-Alexander-Universit=E4t Erlangen-N=FCrnberg =
http://www.cs.fau.de
>=20
>=20
>=20
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