There is a EPYC-7742 dual chip machine running on Ubuntu 20.04 in my office, it performs well at the beginning. However, when all 128 cores are fully running, the CPU temperature rises so quick that it soon reaches 70 degree C. (`sensors` command)
Then if all 128 cores are running, some of them will be locked at 400 MHz, which significantly affected the performance. (`cat /proc/cpuinfo | grep "cpu MHz" | cut -f2 -d: | uniq -c` command)
I guess this is due to high temperature protection of CPU, if so, is there any possibility to turn on the temperature limit from 70 degree C to about 90 degree C?
