This is generally accounted for within the physical implementation tools and lumped into the leaf-to-leaf skew margin number generated internally by the clock tree synthesis tools. Examples are given ...
InCirT’s APLL12GGF22 is the ring-oscillator based analogue-PLL which provides ultra-low jitter (600fs rms jitter at 12.5GHz) and low-power consumption (5.3mW at 12.5GHz) operating from 6GHz ... InCirT ...