TMON - A Monitoring and Testing Tool for Linux kernel thermal subsystem
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Why TMON?
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==========
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Increasingly, Linux is running on thermally constrained devices. The simple
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thermal relationship between processor and fan has become past for modern
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computers.
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As hardware vendors cope with the thermal constraints on their products, more
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and more sensors are added, new cooling capabilities are introduced. The
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complexity of the thermal relationship can grow exponentially among cooling
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devices, zones, sensors, and trip points. They can also change dynamically.
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To expose such relationship to the userspace, Linux generic thermal layer
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introduced sysfs entry at /sys/class/thermal with a matrix of symbolic
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links, trip point bindings, and device instances. To traverse such
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matrix by hand is not a trivial task. Testing is also difficult in that
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thermal conditions are often exception cases that hard to reach in
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normal operations.
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TMON is conceived as a tool to help visualize, tune, and test the
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complex thermal subsystem.
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Files
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=====
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tmon.c : main function for set up and configurations.
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tui.c : handles ncurses based user interface
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sysfs.c : access to the generic thermal sysfs
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pid.c : a proportional-integral-derivative (PID) controller
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that can be used for thermal relationship training.
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Requirements
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============
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Depends on ncurses
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Build
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=========
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$ make
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$ sudo ./tmon -h
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Usage: tmon [OPTION...]
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-c, --control cooling device in control
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-d, --daemon run as daemon, no TUI
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-l, --log log data to /var/tmp/tmon.log
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-h, --help show this help message
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-t, --time-interval set time interval for sampling
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-v, --version show version
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-g, --debug debug message in syslog
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1. For monitoring only:
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$ sudo ./tmon
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