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ECOS max number of threads

Hello, We are using ECOS for our embedded system. We currently use 250 threads in the system. We would like to use more than 256, but we think 256 is the maximum for ECOS. Is there any way to increase this to at least 1024?

Steve

Reply to
Steve
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Can you tell us what you use 250 threads for?

Reply to
David Brown

I presume you mean eCos?

Um, why do you think that? I don't see anything in the source code that looks like a limit. I don't see anything in the ecos.ecc file that looks like it controls the number of threads. The thread structures are allocated in user code, and kept on linked lists by the kernel, so I don't even see why there would be a limit.

The eCos mailing list is probably the best place to ask.

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Reply to
Grant Edwards

We think there is a limit of 256 threads because ECOS does not seem to execute the threads over 256 and the system slows down to a crawl. It is possible that the ECOS Stack is a problem with so many open sockets.

Steve

Reply to
Steve
[It's spelled "eCos".]

There may be, but I couldn't find it in the documentation, configuration, or source code.

By "stack" you mean the TCP/IP network stack? Which one are you using?

IIRC, there _is_ a hard limit on the number of open file descriptors (hence open sockets) and on the maximum number of "pending network events" or somesuch.

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Grant Edwards                   grante             Yow!  Make me look like
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Reply to
Grant Edwards

Ok it's eCos. Yes I mean TCPIP Stack. I notice quite a few select failures when the threads get over 256. I have the socket/file/pending count set to

4096 and 40 megs of net memory. I don't see any socket failures just select receive failures. We use free bsd tcpip.

Steve

Reply to
Steve

Thanks. :)

I don't _know_ of any intentional limit anywhere on the number of threads. Try the eCos mailing list.

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Grant Edwards                   grante             Yow!  HELLO KITTY gang
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Reply to
Grant Edwards

Just a quick stab, but did you confirm FD_SETSIZE to be what you need ?

Reply to
Dan S.

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