Hi, all:
I have one question about timer interrupt (i386 architecture).
As we known, the timer emit HZ times interrputs per second,
and in i386. The interrupt handler will call scheduler_tick()
each time (on i386 at least, both enable or disable APIC).
On my Celeron machine(IOW, only one CPU, not SMP/SMT), I defined
a global int variable 'tick_count' in kernel/sched.c, and add one line
of code like follow in scheduler_tick():
++tick_count;
but I found it is not same with content of the /proc/interrupts,
and the differennt between them is not little.
I can not understand why that is.
Any useful idea.
-liyu / NOW~
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