OpenBSD Hardware Sensors — Environmental Monitoring and Fan Control
MetadataShow full item record
This thesis discusses the motivation, origin, history, design guidelines, API, the device drivers and userland utilities of the hardware sensors framework available in OpenBSD. The framework spans multiple utilities in the base system and the ports tree, is utilised by over 75 drivers, and is considered to be a distinctive and ready-to-use feature that sets OpenBSD apart from many other operating systems, and in its root is inseparable from the OpenBSD experience. The present framework, however, is missing the functionality that would allow the user to interface with the fan-controlling part of the hardware monitors. We therefore discuss the topic of fan control and introduce sysctl-based interfacing with the fan-controlling capabilities of microprocessor system hardware monitors. The discussed prototype implementation reduces the noise and power-consumption characteristics in fans of personal computers, especially of those PCs that are designed from off-the-shelf components. We further argue that our prototype is easier, more intuitive and robust compared to solutions available elsewhere.
Cite this version of the work
Constantine Aleksandrovich Murenin (2010). OpenBSD Hardware Sensors — Environmental Monitoring and Fan Control. UWSpace. http://hdl.handle.net/10012/5234
Showing items related by title, author, creator and subject.
Foveated Sampling Architectures for CMOS Image Sensors Saffih, Fayçal (University of Waterloo, 2005)Electronic imaging technologies are faced with the challenge of power consumption when transmitting large amounts of image data from the acquisition imager to the display or processing devices. This is especially a concern ...
A multifunctional sensor system for brake system applications Hernandez Aguirre, Rogelio (University of Waterloo, 2015-09-28)The objective of this thesis is to develop a multifunctional MEMS (Micro Electro Mechanical System) sensor system for the simultaneous measurement of pressure and temperature inside a hydraulic system, more specifically a ...
Distributed Target Engagement in Large-scale Mobile Sensor Networks Hosseini Semnani, Samaneh (University of Waterloo, 2015-04-29)Sensor networks comprise an emerging field of study that is expected to touch many aspects of our life. Research in this area was originally motivated by military applications. Afterward sensor networks have demonstrated ...