msr-safe support

• libmsr
• RAPL
• DVFS
• powercap

Whitelist

/dev/cpu/msr_whitelist (from v1.5.0 msr_allowlist)

Get model type

$ cpuinfo -s

$FAMILY_$xMODEL$MODEL

msr_safe support:

• DVFS under intel_pstate requires WRITE access to the following files

• /sys/devices/system/cpu/intel_pstate/no_turbo
• /sys/devices/system/cpu/cpu*/cpufreq/scaling_max_freq

• msr-based performance counters
• implement batch support
• using msr_safe without libmsr

1. native
2. init + fini - open/close file descriptors
3. batch