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Solaris Dynamic Tracing Guide
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Principal Buffers

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:

exit()

printf()

trace()

ustack()

printa()

stack()

tracemem()

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.

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  Published under the terms fo the Public Documentation License Version 1.01. Design by Interspire