Thank you very much.

I have a further question.

The idle thread creates another two threads--sigma0_thread and boot_thread (in Kernel_thread::init_workload in kernel_thread-std.cpp file ).

I am curious about what their priority is and when they finish.

In addition in my test, I only have a single thread doing memory map and unmap.

But I find it is always preempted by another two threads. I do not know what they are.

Could you give me some hints?

Thank you again.

Yuxin

On Thu, Sep 25, 2014 at 5:46 PM, Adam Lackorzynski <adam@os.inf.tu-dresden.de> wrote:

Hi,

On Wed Sep 24, 2014 at 16:25:31 -0400, Yuxin Ren wrote:
> I want to know what kernel idle thread does.
> Does it just execute "halt" instruction or anything else?

Mostly it is calling a halt instruction but it can also do remote work.

> Where is code for the idle thread?

Please look for 'for (;;) idle_op()' in kernel_thread.cpp and
app_cpu_thread.cpp.

Adam
--
Adam adam@os.inf.tu-dresden.de
Lackorzynski http://os.inf.tu-dresden.de/~adam/

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