Improve cpusensor performance

The cpusensor service is still making some redundant accesses for
reading hwmon attributes on every scanning. Actually, threshold
update is needed only when CPU package's Tcontrol target is
changed so this commit make it do that only when Tcontrol value
is changed.

Tested:
  Compare cpu resource consumption of cpusensor service using top.
  It should eat less cpu resources than before.

Change-Id: Ieb582996fc5c9c07abbfc7ac0d1b37f593269d00
Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
3 files changed
tree: 3333072072f9431eb0d0532ebe0061e1cfe516cf
  1. cmake/
  2. include/
  3. service_files/
  4. src/
  5. tests/
  6. .clang-format
  7. .gitignore
  8. cmake-format.json
  9. CMakeLists.txt
  10. Jenkinsfile
  11. LICENSE
  12. MAINTAINERS
  13. README.md
README.md

dbus-sensors

dbus-sensors is a collection of sensor applications that provide the xyz.openbmc_project.Sensor collection of interfaces. They read sensor values from hwmon, d-bus, or direct driver access to provide readings. Some advance non-sensor features such as fan presence, pwm control, and automatic cpu detection (x86) are also supported.

key features

  • runtime re-configurable from d-bus (entity-manager or the like)

  • isolated: each sensor type is isolated into its own daemon, so a bug in one sensor is unlikely to affect another, and single sensor modifications are possible

  • async single-threaded: uses sdbusplus/asio bindings

  • multiple data inputs: hwmon, d-bus, direct driver access