-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Alok Singh wrote: > Thanks for all the suggestions. My only issue is, and a simple one, that > if I want to send a packet out of the device in the network thread > context, then I've problems. We have our implementation of message > queues, mutexes, and other stuff that all use POSIX calls. So the code > crashes, since I'm trying to make posix calls (while putting the packet > in the message queue, and using mutexes), in the context of native cyg > thread context. To overcome this problem, I'm queuing the packet coming > out of the network stack, and then another posix thread de-queues the > packet, and sends it out. This is working fine except that performance > is not that good, and some fine tuning is required. In the limited > testing I did while sending the packet out in the context of network > thread, the performance is better, and suits my purpose.
Sorry, but this description doesn't make a lot of sense (to me at least). There should be no difference doing network I/O from a POSIX thread and a native eCos thread. Everything should boil down to socket I/O, which is the API exported by the network stacks. Perhaps you can explain in more detail, or provide some code snippets. What do you mean by "send a packet out of the device in the network thread context?" > > There is no issue with BSD stack. It runs perfectly fine. > > regards, > Alok > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Nick > Garnett > Sent: Tuesday, May 29, 2007 10:56 PM > To: Alok Singh > Cc: [email protected] > Subject: Re: [ECOS] Net BSD network stack posix tasks - > > "Alok Singh" <[EMAIL PROTECTED]> writes: > >> Hi, >> I don't understand licensing issues much. I've a question. Am I > allowed >> to convert network stack threads to posix threads instead of native > cyg >> threads? I've compatibility issues making ecos network stack work > with >> my application (Posix based.) Though there are ways to overcome this >> issue, but they affect the performance of the system. > > (I'm not sure why this has anything to do with licensing.) > > The network threads are internal to the stack. POSIX threads are for > running application code. The network threads will never run > application code and so don't need to be POSIX threads. The network > threads work perfectly well alongside POSIX applications without > needing to be POSIX threads themselves. > > I don't know what problems you are having, but your suggestion is > almost certainly the wrong solution. It sounds to me like you are > trying to do something that eCos doesn't support. Tell us what the > problem is and maybe someone can offer a better solution. > > - -- - ------------------------------------------------------------ Gary Thomas | Consulting for the MLB Associates | Embedded world - ------------------------------------------------------------ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org iD8DBQFGXWckmaKbSsQGV8ARAr3GAKCCnOVJk6HLJcYN9wLLJSVzJLAOlgCgqeUN +tgYjbY2PUR/MndJIzNO3GM= =K/bm -----END PGP SIGNATURE----- -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
