The new option for function tracing aims to save space on the ring buffer and to make it more readable in the case when a single function is called number of times consecutively:
while (cond) do_func(); Instead of having an identical records for each call of the function we will record only the first call, followed by an event showing the number of repeats. Yordan Karadzhov (VMware) (5): tracing: Define new ftrace event "func_repeats" tracing: Add "last_func_repeats" to struct trace_array tracing: Add method for recording "func_repeats" events tracing: Unify the logic for function tracing options tracing: Add "func_no_repeats" option for function tracing kernel/trace/trace.c | 22 ++++ kernel/trace/trace.h | 24 ++++ kernel/trace/trace_entries.h | 16 +++ kernel/trace/trace_functions.c | 219 +++++++++++++++++++++++++++++---- kernel/trace/trace_output.c | 44 +++++++ 5 files changed, 298 insertions(+), 27 deletions(-) -- 2.25.1