>> Hi,
>> I have a question regarding short sleeps (under 10 millisec).
1. Busy wait : It is like the story about Abed (in "Yalkut Hakzavim") - Abed
could throw a grenade to 80 meters. Once he needed to throw to 50 meters
he stepped back 30 ...
2. You can't do idle wait less then 10mSec. The clock in PC is set to that
value
(probably can be manipulate, but it will result so many things so better
not). It
mean interrupt at 100Hz. Accurate clock is not good enough - you need an
"alarm clock"; a timer, that will give you an interrupt as you choose.
You can
by such PCI cards, just check if it supported.
Now, once you have an interrupt at you choice, you can either execute
your
needs at ISR level, or, using the select (man 2 select) with a pipe
descriptor
to which the ISR write. Note that here you need preemption and R.T.
priority
like Eran wrote.
Feel free to contact me for more details.
Iftach
(Orna - I want royalties).
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