Turbo Boost

This is one of @brendangregg's Model Specific Register (MSR) tools ported to FreeBSD. To see the original tools, check out here.

Prereqs

This tool depends on x86info package to get the CPU family, and Set CPU MHZ(Estimated current CPU frequency).

It also uses cpucontrol(8) to read the msr values.

Tested on FreeBSD 12.0-CURRENT.

# sudo pkg install x86info
# kldload cpuctl

Contents

• showboost: show the real CPU clock rate to understand the current level of turbo boost.

Screenshots

Measure the actual clock rate for CPU 0:

# ./showboost
Base CPU MHz : 3000
Set CPU MHz  : 3000
Turbo MHz(s) : 3400 3500
Turbo Ratios : 113% 116%
CPU 0 summary every 1 seconds...

TIME       C0_MCYC      C0_ACYC        UTIL  RATIO    MHz
21:41:43   3021819807   3521745975     100%   116%   3496
21:41:44   3021682653   3521564103     100%   116%   3496
21:41:45   3021389796   3521576679     100%   116%   3496
21:41:46   3021685725   3521635645     100%   116%   3496
21:41:47   3021297135   3521362183     100%   116%   3496
[...]