craswell

I am curious about how core temperatures are measured. I am running Unraid 7.2.3 on a Ugreen DXP4800 plus (Intel® Pentium® Gold 8505 @ 4356 MHz). I am using the Dynamix System Temperature plugin. Last evening I rebuilt my Immich installation and loaded over 71000 photos and a few hundred short videos. Since then the Immich Machine Learning jobs have been hammering away processing all of the photos for OCR, facial recognition, transcoding, etc. I noticed that the CPU core have been running at full capacity since that time. I expect this to happen and it should take about 24-36 hours to complete the process. I noticed on the dashboard that the core temperature was getting very high. (> 90°C). So I thought I would pause the Immich processing for a bit to bring the temperature down. Within two seconds the temperature dropped back to the mid 40°C range. I did not expect it to drop that quickly. I waited a few minutes and restarted the Immich processes. Instantly, the reported temperature jumped to 100°C then settled after about 3 seconds to 90°C. I repeated this several times with similar results. The speed of these changes seems suspect to me, and it causes me question the accuracy of what I am seeing. Is this rapid temperature change normal? Do I have my plugin measuring the wrong thing? Am I just mis-interpreting things? The plugin uses driver "coretemp" and the processor setting is "coretemp - CPU Temp".