Consistent hierarchical timing model with crosstalk consideration

1. A method for hierarchical static timing analysis comprising:

performing one or more iterations in static timing analysis on a lower-level block;

storing intermediate data of the static timing analysis of the lower-level block for an iteration, including simplified representations of aggressor effects, the simplification based on an plurality aggressor types; and

loading and utilizing the stored intermediate data in performing static timing analysis on an upper-level block.

2. The method of claim 1 , wherein the intermediate data of the lower-level block analysis for the iteration is stored to a data storage device.

3. The method of claim 1 , further comprising:

marking and representing aggressors in a circuit;

evaluating a victim net impacted by one or more aggressors;

classifying the one or more aggressors into one of a plurality of aggressor types; and

simplifying the aggressor representation based on the determined aggressor type.

4. A method for hierarchical static timing analysis comprising:

performing one or more iterations in static timing analysis on a lower-level block;

storing intermediate data of the static timing analysis of the lower-level block for an iteration, wherein the intermediate data comprises marking data and a representation of the aggressors in the lower-level block;

loading and utilizing the stored intermediate data in performing static timing analysis on an upper-level block.

5. The method of claim 4 , wherein the intermediate data of the lower-level block analysis for the iteration is stored to a data storage device.

6. The method of claim 5 , wherein the intermediate data of the lower-level block analysis for the iteration is loaded from the data storage device to perform the static timing analysis on the upper-level block.

7. The method of claim 4 , wherein the intermediate data of the lower-level block analysis for the iteration is utilized in the upper-level iteration.

8. A method of marking and modeling aggressors in a circuit, the method comprising:

evaluating a victim net in the circuit impacted by one or more aggressors, including marking and representing aggressors in a circuit;

classifying the one or more aggressors into types; and

simplifying aggressor representation based on the determined type, wherein the simplified aggressor representation is derived from an iteration of a block level static timing analysis on a lower level block.

9. The method of claim 8 , wherein the plurality of aggressor types comprise: low level, medium level, and high level aggressors.

10. The method of claim 9 , wherein a medium level aggressor of a victim is abstracted by a lumped macro-model.

11. The method of claim 10 , wherein the lumped macro-model comprises of a Thevenin driver model and lumped aggressor net resistance, ground and coupling capacitance values.

12. The method of claim 9 , wherein a high level aggressor of a victim is abstracted by a reduced complexity model.

13. The method of claim 12 , wherein, drivers of the aggressor is reduced to represent only the worst case switching scenario.

14. The method of claim 12 , wherein, receivers of the aggressor are reduced to pin capacitors.

15. The method of claim 9 , wherein a low level aggressor of a victim is abstracted by a delta delay and slew.

16. The method of claim 8 , further comprising:

storing the simplified aggressor representation; and

using the simplified aggressor representation in an iteration of the static timing analysis in an upper level upper-level block.

17. A system to enable hierarchical static timing analysis, comprising a computer system including a processor, memory and hard disk, the system comprising:

the processor to perform iterative static timing analysis on a lower-level block;

a data storage device to store intermediate data of the static timing analysis of the lower-level block for each iteration, including simplified representations of aggressor effects, the simplification based on an plurality aggressor types;

a volatile memory to store a retrieved intermediate data from the analysis of the lower-level block on a per iteration basis; and

the processor to utilize the intermediate data of the iteration in the volatile memory to perform static timing analysis on an upper-level block.

18. The system of claim 17 , wherein the intermediate data a simplified representation of aggressors, the simplification based on a plurality aggressor types.

19. An article of manufacture comprising a machine-accessible non-transitory medium including data that, when accessed by a machine, cause the machine to perform operations comprising:

performing one or more iterations in static timing analysis on a lower-level block, the lower level block;

storing intermediate data of the static timing analysis of the lower-level block for an iteration, including simplified representations of aggressor effects, the simplification based on an plurality aggressor types; and

loading and utilizing the stored intermediate data in performing static timing analysis on an upper-level block.

20. The article of manufacture of claim 19 , wherein the simplified representations of aggressor effects are generated by:

marking and representing aggressors in a circuit;

evaluating a victim net impacted by one or more aggressors;

classifying the one or more aggressors into one of a plurality of aggressor types;

simplifying the aggressor representation based on the determined aggressor type.

21. The article of manufacture of claim 20 , wherein the data causing the machine to perform mark one or more aggressors comprises data that, when accessed by the machine, cause the machine to perform operations comprising:

evaluating a victim net impacted by one or more aggressors;

classifying the one or more aggressors into types;

simplifying aggressor representation based on the determined type.