Traversing Runqueu - CFS

Hi,

    Looking for a way to traverse the runqueue, so that I could get the contents of the runqueue. Initial reading tells that sched.h has ched_entity structure, which holds some of the data for it, like the 

struct rb_node        run_node;

Also read that redblack tree is used to hold the elements with "vruntime" as the index of it. 

Could anyone give a way forward to doing this. 
 		 	   		  
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