It looks like Ring Oscillator is what we need and it is coming soon!

from Wiki:

• A ring oscillator is often used to demonstrate a new hardware technology, analogous to the way a hello world programis often used to demonstrate a new software technology.[7][8]
• Manywafersinclude a ring oscillator as part of the scribe line test structures. They are used duringwafer testingto measure the effects of manufacturing process variations.[9]
• Ring oscillators can also be used to measure the effects of voltage and temperature on a chip.[10]