这是一个很有意思的debug 函数， 能够遍历block 住的任务，遍历的时候可以调用相应的debug_function 函数把任务的具体参数全部打印出来。

Opt =1 的意思是遍历的时候全部唤醒所有block 住的任务，opt=0 则不影响。-This is a very interesting debug function, can traverse the task of block live, when you can call the corresponding debug_function function to the specific parameters of the task all print out.

=1 Opt means that all of the time when the traversal of the block live in the task, opt=0 will not affect.