On Wed, 18 Feb 2015 19:38:01 +0100, Nicholas Mc Guire said: > On Wed, 18 Feb 2015, Greg KH wrote:
> interesting - would you have a reference to some talk/paper/data/... ?
Test for yourself :)
config PROFILE_ANNOTATED_BRANCHES
bool "Trace likely/unlikely profiler"
select TRACE_BRANCH_PROFILING
help
This tracer profiles all likely and unlikely macros
in the kernel. It will display the results in:
/sys/kernel/debug/tracing/trace_stat/branch_annotated
Note: this will add a significant overhead; only turn this
on if you need to profile the system's use of these macros.
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