sysfs missing CPU thermal_throttle information

**Background Information:** I'm running Ubuntu 24.04.1 LTS (Noble Numbat, kernel 6.8.0-51-generic) on an AMD Ryzen 9 7950X3D, and I'm investigating some odd behavior where the CPU governor/driver will ***lower*** the CPU frequency when under full load. Using the performance governor and the amd-pstate driver, here's what I'm seeing: | Load | 15 min Load Avg | CPU Temp | CPU Frequency | | | ---- | :-------------- | -------- | ---------------: | -------- | | Idle | 1.12 | 40.8 C | 5,759,000,000 Hz | 5.76 GHz | | Full | 33.02 | 58.5 C | 4,827,047,000 Hz | 4.83 GHz | I'm fairly confident that 58.5C isn't hot enough to cause thermal throttling on the CPU, but I'd like to be sure so that I know how to direct my investigation: - If it's thermal throttling, I'll get a better cooling system. - If it's not thermal throttling, I'll keep looking into configuration options [This post](https://unix.stackexchange.com/questions/477088/cpu-thermal-throttle-counters?newreg=280449e8db7b4d9395891d3e0fe2fa4a) suggests that I should be able to see throttling information in /sys/devices/system/cpu/cpu*/thermal_throttle/, however the thermal_throttle directory is missing:

/sys/devices/system/cpu/cpu0 $ file *
acpi_cppc:        directory
cache:            directory
cpufreq:          symbolic link to ../cpufreq/policy0
cpuidle:          directory
crash_notes:      regular file, no read permission
crash_notes_size: regular file, no read permission
driver:           symbolic link to ../../../../bus/cpu/drivers/processor
firmware_node:    symbolic link to ../../../LNXSYSTM:00/LNXSYBUS:00/ACPI0010:00/ACPI0007:00
hotplug:          directory
microcode:        directory
node0:            symbolic link to ../../node/node0
power:            directory
subsystem:        symbolic link to ../../../../bus/cpu
topology:         directory
uevent:           ASCII text, with very long lines (1212)

**The Question:** Why is this missing from sysfs, and how can I get the CPU throttling information?