linux-kernel - [RFC PATCH 0/5] Add "func_no

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Message-Id: <20210304090141.207309-1-y.karadz@gmail.com>
Date:   Thu,  4 Mar 2021 11:01:36 +0200
From:   "Yordan Karadzhov (VMware)" <y.karadz@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     tglx@...utronix.de, peterz@...radead.org, rostedt@...dmis.org,
        "Yordan Karadzhov (VMware)" <y.karadz@...il.com>
Subject: [RFC PATCH 0/5] Add "func_no_repete" tracing option

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