On Jan 9, 2009, at 7:21 PM, Peter Teoh wrote:
hm...i like this problem.....someone got the same problem too:
http://lkml.indiana.edu/hypermail/linux/kernel/0009.3/0906.html
does your problem look similar?
Not really, but that page is now bookmarked (very interesting!)
I guess I should have dug deeper. What I find is that delays greater
than one system tick are easy as long as all the possible blocks and
preemptions are considered. Going shorter that one tick (1ms) is
basically impossible without using some form of HW timer and
interrupts. Using what I had been using (spinning on the clock counter
register in the CPU) works well enough and does allow a window for
preemption by other threads/interrupts.
Thanks!
-Bruce
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