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 2. Types, Operators, and Expressions 8. Type and Constant Definitions 34. Statically Defined Tracing for User Applications  | 
      
	 Other BuffersPrincipal buffers exist in every DTrace enabling. Beyond principal buffers, some DTrace consumers may have additional in-kernel data buffers: an aggregation buffer, discussed in Chapter 9, Aggregations, and one or more speculative buffers, discussed in Chapter 13, Speculative Tracing.  | 
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