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CONFIG_PROFILE_ALL_BRANCHES: Profile all if conditionals

General informations

The Linux kernel configuration item CONFIG_PROFILE_ALL_BRANCHES:

Help text

This tracer profiles all branch conditions. Every if () taken in the kernel is recorded whether it hit or miss. The results will be displayed in:

/sys/kernel/debug/tracing/trace_stat/branch_all

This option also enables the likely/unlikely profiler.

This configuration, when enabled, will impose a great overhead on the system. This should only be enabled when the system is to be analyzed in much detail.

Hardware

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