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CONFIG_TRACE_BRANCH_PROFILING: Trace likely/unlikely profiler

General informations

The Linux kernel configuration item CONFIG_TRACE_BRANCH_PROFILING has multiple definitions:

found in kernel/trace/Kconfig

The configuration item CONFIG_TRACE_BRANCH_PROFILING:

Help text

(none)

Trace likely/unlikely profiler found in kernel/trace/Kconfig

The configuration item CONFIG_TRACE_BRANCH_PROFILING:

Help text

This tracer profiles all the the likely and unlikely macros in the kernel. It will display the results in:

/debugfs/tracing/profile_annotated_branch

Note: this will add a significant overhead, only turn this on if you need to profile the system's use of these macros.

Say N if unsure.

Hardware

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