Latency

Clock Latency

•  Latency is the combination of both source latency and network latency 
• Clock Latency = source latency + Network latency

source latency:

Time taken by the signal to propagate from the clock source to clock definition point

Network latency: 

Time is taken by the signal to propagate from clock definition point to register clock pin

How to give the latency target by command 

• set_clock_latency 0.2 -rise [get_clocks clock] 
• set_clock_latency 0.1 -fall [get_clocks clock]

If we don't specify the  -source switch tool automatically it consider as a network latency

• set_clock_latency  -source 0.300 -early [get_clocks clock]
• set_clock_latency  -source 0.400 -late [get_clocks clock]