Taiob Ali explains what the CPU and memory measures are from the scheduler monitor ring buffer:
Here is a sample output of XML from sys.dm_os_ring_buffers where WHERE ring_buffer_type = N’RING_BUFFER_SCHEDULER_MONITOR’. What do those XML elements mean? In order to monitor CPU usages, you need to understand what each element means so you can use the values. I will explain each one in this blog post.
Read on for the list and what each means.