Frequency scaling — adjusting a CPU’s operating frequency to save power when the
workload demands are low — is common practice across systems supported by
Linux. It
is, however, viewed with some suspicion in data-center settings, where
power consumption is less of a concern and there is a strong emphasis on
getting the most performance out of the hardware. At the 2020 Power Management and Scheduling
in the Linux Kernel summit (OSPM), Giovanni Gherdovich worried that
frequency scaling may be about to go extinct in data centers; he made a
plea for improving its behavior for such workloads while there is still
time.

Source: LWN.net – [$] Saving frequency scaling in the data center