Typically I would suggest turbostat, but it is kernel version specific and a quick search suggests Skylake was not added until 4.1. Assume your CentOS 7 is running an old 3.x kernel?
Power is not difficult to calculate via the RAPL energy counters. Userland access was added in kernel 3.13 via /sys/class/powercap/intel-rapl/intel-rapl:0/. The file "energy_uj" exposes the CPU energy usage in microjoules. (Unsure how it is exposed per socket, but assume it is via multiple paths/files.) Take a couple of samples (with a known delay in between) and convert to watts.
The "msr-tools" package provides rdmsr as an alternative approach (requires root). The latter requires reading MSR PKG_ENERGY_STATUS scaled by MSR RAPL_POWER_UNIT (for the energy unit) and then divided by elapsed time for watts. The longer/more-accurate your sample-to-sample time, the less jitter and higher accuracy but with more averaging.
