It is currently implemented very crudely, but the above slow-update image represents the latest known status of HAK's CPUs. The data is collected by simply examining /proc/acpi/thermal_zone/THM/temperature within a script that sleeps for 300s between samples.
In the image, node color represents temperature. The displayed range goes from 35 C (blue) to 75 C (red). Nodes for which new data has not been reported are shown as magenta... there are various reasons why that can happen, although a system crash is certainly one of the more obvious.
It is interesting to note that pairs of nodes share the same power supply in HAK, and each such pair has its cases joined in such a way that they function as a single duct for airflow. Thus, one would expect pairs to have about the same CPU temperatures. However, this is not always how it goes. In fact, the warmer nodes often seem to be upside-down Tbreds paired with cooler upright Bartons. The upright nodes are the ones with the power supplies (and hence their fans), so it might not really be a Tbred vs. Barton thing. Either way, this effect was not expected.
Of course, the whole machine gets warmer as either the air conditioning cycles off or the CPU computations become more intense. In particular, carefully-tuned 3Dnow! code (especially our code for use with Atlas) is known to cause a significant increase in both power drawn and heat generated.
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