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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