The pulse width checks are some rule checks on the signal waveforms when they reach the hardware primitives after propagation through the device. They usually correspond to functional limits dictated by the circuitry inside the primitive. For example, the minimum period check on a DSP clock pin ensures that the clock driving a DSP instance does not run at higher frequency than what is tolerated by the internal DSP.
The pulse width checks do not affect synthesis or implementation. Their analysis must be performed once before the bitstream generation like any other design rule check provided by the Vivado Design Suite.
When a pulse width violation occurs, it is due to an inappropriate clock
definition (pulse width and period checks) or an inappropriate clock topology that
induces too much skew (max_skew check). You must review
the AMD FPGA data sheet of the target device to understand the
operation range of the primitive where the violation occurs. In the case of a skew
violation, you must simplify the clock tree or place the clock resources closer to the
violating pins.