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<p class="MsoNormal">Hi All,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We use EntityManager and dbus-sensors to scan for installed hardware and sensors. Phosphor-pid-control is used to control fans by creating passive sensors that monitors the dbus-sensors objects.<o:p></o:p></p>
<p class="MsoNormal">We are looking at adding the ability to detect missing sensors due to some hardware failures and boost fans based on the zone config.<o:p></o:p></p>
<p class="MsoNormal">The challenges are<o:p></o:p></p>
<ol style="margin-top:0in" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Correctly identify sensors that expected to be present, but are not discovered.
<o:p></o:p></li></ol>
<p class="MsoListParagraph">For example, not all CPUs are populated on a baseboard, so simply adding a “required” sensor for CPUs will not work.<o:p></o:p></p>
<p class="MsoListParagraph">A “required” sensor need to be tied into a present detection, which may or may not be supported by hardware.<o:p></o:p></p>
<ol style="margin-top:0in" start="2" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo1">Notify phosphor-pid-control of missing sensor and/or “stale” sensor at run time<o:p></o:p></li></ol>
<p class="MsoNormal" style="margin-left:.5in">This can be accomplished by dbus-sensors creating the missing sensor object and set it to failed state.<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:.5in">Fan control also needs to detect any sensor that stops updating its value and treat that as a failed sensor.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am reaching out to the community to see if anyone has already addressed this issue or has some design that can be leveraged to solve the above issue.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal">Zhikui<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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