On Thu, 11 May 2000, Jacek M. Holeczek wrote:
> Unfortunately, looking at the shmem HOWTO I have found that the maximum
> size of shmem segment is limited to 4MB (older machines to 1MB). Do I
> understand right that even if I have 215MB RAM I cannot have 100MB shared
> memory segment ? If yes, is there any way to overcome this limitation ?
Use mbuff.o and you will be limited only by the amount of free memory you can
get.
> This reminds me another question - what is the maximum time that I can
> spend in an interrupt (1ms , 10ms, 100ms), so that the system does not
> become instable ? On principle I expect a structure of about 4s when I
My guess is that anything over 10 ms may interfere with the timer.
> need to collect events as fast as possible (I mean there can be interrupt
> after interrupt coming) followed by some 4s of quiet (I can send the
> collected data in that time via ethernet).
If you leave just a little time between interrupts for Linux kernel, all
should be OK. I would not recommend busy-loop over 100 ms without scheduling
Linux processes, but if you do not use it interactively it might even work
:-)
Serdecznie pozdrawiam,
--
Tomek
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