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|Oracle Solaris 11.1 Dynamic Tracing Guide Oracle Solaris 11.1 Information Library|
The principal buffer is present in every DTrace invocation and is the buffer to which tracing actions record their data by default. These actions include:
The principal buffers are always allocated on a per-CPU basis. This policy is not tunable, but tracing and buffer allocation can be restricted to a single CPU by using the cpu option.