[EMAIL PROTECTED] wrote:
Just to clarify this: lwIP's core is (intentionally) not thread-safe: It
should be small to be used without an OS. If you want to use it from
different threads, you cannot use the raw api, use the netconn or
sockets api instead (if anyone doesn't know what that is, read about it
at http://lwip.scribblewiki.com/). Thus lwIP _is_ thread safe if you
want it to.
That said, if I understand you correctly, you want to run 200 full
instances of lwIP in one process: that doesn't work (also,
intentionally): many parts in lwIP use global or static variables (the
whole stack is _not_ reentrant). After all, running lwIP in a process is
much like running it on its own device (a completely seperate address
space). Running 2 instances in 2 different threads in the same process
is like running it twice on the same device: you could make it work with
a high effort, but there's no use for that in normal life...
Simon
Hi Simon,
I knew there was one large company in the Northwest USA that doesn't
believe testing is part of normal life, but I wasn't aware that everyone
believed that. Be that as it may, many devices need multiple stacks
running, for example one for a network interface and a second for ppp on
a serial port. This can be done with Rabbits and PICs, so it should
qualify as a valid target. I believe you have taken much too narrow a
view of normal life.
But I also think you misread my description. I need 2000 full instances
running simultaneously. Only the prototype may be limited to 200. Each
instance must emulate one of several different devices and open a
permanent TCP connection with a transaction server using a unique IP
source address. This eliminates UML and VMWare as hosts, since they
cannot support anywhere near that many sessions. It is not possible to
set up that many devices in our facility, even if we emptied out the
entire warehouse to make room for them. Perhaps you can suggest some
other way to implement this test bench?
Thank you,
Bob McConnell
N2SPP
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