Developer Reference for Intel® oneAPI Math Kernel Library - C
Returns the frequency value in GHz based on constant-rate Time Stamp Counter.
returns the CPU frequency value (in GHz) based on constant-rate Time Stamp Counter (TSC). Use of the constant-rate TSC ensures that each clock tick is constant even if the CPU frequency changes. Therefore, the returned frequency is constant.
Obtaining the frequency may take some time when
is called for the first time. The same holds for functions