On 11/5/05, Oliver Korpilla <Oliver.Korpilla@xxxxxx> wrote: > If there weren't performance and overhead differences > between a protected memory approach and doing it in > kernel space, why are nearly all realtime OS > without that distinction? In my humble opinion this is because they're too simplistic. > Same goes for the micro-kernel approach with > micro-kernel, server tasks and user space - doesn't even Linus itself argue > (the Tanenbaum "argument") that the additional context switches pose too much overhead. > Oliver Korpilla Overhead/high-performance (iow speed), and real-time perfomance are different things. You seem to use them synonymously. Even putting aside the real-time aspect, I recommend you to read "User-level device drivers: achieved performance" from www.nicta.com.au/uploads/documents/PA005043_NICTA.pdf Thanks, Bahadir -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
