linux-kernel - [PATCH 0/3] PM / devfreq: Add devfreq_frequency tracepoint to track frequency change

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Message-Id: <20201008075403.26181-1-cw00.choi@samsung.com>
Date:   Thu,  8 Oct 2020 16:54:00 +0900
From:   Chanwoo Choi <cw00.choi@...sung.com>
To:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     mka@...omium.org, rostedt@...dmis.org, mingo@...hat.com,
        cw00.choi@...sung.com, chanwoo@...nel.org,
        myungjoo.ham@...sung.com, kyungmin.park@...sung.com
Subject: [PATCH 0/3] PM / devfreq: Add devfreq_frequency tracepoint to track
 frequency change

Add devfreq_tracepoint to track the correct timing of frequency change
with following information:
- device name
- current frequency
- previous frequency
- load when change frequency
- tracepoint path : /sys/kernel/debug/tracing/events/devfreq_frequency

And add devfreq_update_target() function to unify the frequency change code
on both devfreq core and devfreq passive governor because there are redundant
duplicate code. Lastly, Use fixed indentation size to improve readability
for 'devfreq_monitor' tracepoint.

Matthias already sent the patch[1]. Make patch3 by editing patch[1].
[1]https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg2108015.html

Chanwoo Choi (2):
  trace: events: devfreq: Use fixed indentation size to improve readability
  PM / devfreq: Unify frequency change to devfreq_update_target func

Matthias Kaehlcke (1):
  PM / devfreq: Add tracepoint for frequency changes

 drivers/devfreq/devfreq.c          | 37 +++++++++++++++++++++-----
 drivers/devfreq/governor.h         |  1 +
 drivers/devfreq/governor_passive.c | 42 +++++++-----------------------
 include/trace/events/devfreq.h     | 30 ++++++++++++++++++++-
 4 files changed, 70 insertions(+), 40 deletions(-)

-- 
2.17.1