[Ilugc] freebsd interrupt handling
- From: girishvenkatachalam@xxxxxxxxx (Girish Venkatachalam)
- Date: Fri Sep 24 09:23:08 2010
On Fri, Sep 24, 2010 at 4:27 AM, Eknath Venkataramani
<eknath.iyer@xxxxxxxxx> wrote:
This is my homework question and I need a pointer to know what I must look
for.
How does FreeBSD 5.2.1 control the interrupt level?
For example, is it possible to block off network interrupts when servicing a
clock interrupt?
If so, how? ?How are interrupt threads managed
(created/destroyed/scheduled)?
In short I dunno.
The long answer is that you should look at the FreeBSD kernel code.
It is very big compared to OpenBSD and you will have to spend a long time.
Normally however the clock interrupt gets the highest priority.
Normally interrupts on x86 are managed by the 8051 PIC I think.
It happens at the hardware level. Most of the time interrupt lines are
shared and daisy chained.
-Girish
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