How does Kernighan Lin algorithm work?
The algorithm maintains and improves a partition, in each pass using a greedy algorithm to pair up vertices of A with vertices of B, so that moving the paired vertices from one side of the partition to the other will improve the partition.
What is partition VLSI?
Efficient designing of any complex system necessitates decomposition of the same into a set of smaller subsystems. Subsequently, each subsystem can bedesigned independently and simultaneously to speed up the design process. The process of decomposition is called partitioning .
Why partitioning is important in VLSI?
Partitioning has been applied to solve the various aspects of VLSI design problems [5, 36]: Physical packaging Partitioning decomposes the system in order to satisfy the physical packaging constraints. The partitioning con- forms to a physical hierarchy ranging from cabinets, cases, boards, chips, to modular blocks.
How do you partition a graph?
There are two ways to partition a graph, by taking out edges, and by taking out vertices. Graph partitioning algorithms use either edge or vertex separators in their execution, depending on the particular algorithm.
What is cluster in VLSI?
Abstract: Circuit partitioning plays a fundamental role in hierarchical layout systems. Identifying the strongly connected subcircuits, the clusters, of the logic can significantly reduce the delay of the circuit and the total interconnection length.
What is floorplanning in VLSI?
Floorplanning involves determining the locations, shape, size of modules in a chip and as such it estimates the chip area, delay and the wiring congestion, thereby providing a ground work for layout.
What is K way partitioning?
The multilevel k-way partitioning algorithm reduces the size of the graph by collapsing vertices and edges (coarsening phase), finds a k-way partition of the smaller graph, and then it constructs a k-way partition for the original graph by projecting and refining the partition to successively finer graphs (uncoarsening …
What is STA in VLSI?
Static Timing Analysis (STA) is one of the techniques to verify design in terms of timing. This kind of analysis doesn’t depend on any data or logic inputs, applied at the input pins. The input to an STA tool is the routed netlist, clock definitions (or clock frequency) and external environment definitions.
What is Keepout margin in VLSI?
Keep-out margin: it is a region around the boundary of fixed cells in a block in which no other cells are placed. The width of the keep-out margin on each side of the fixed cell can be the same or different.
What is max flow and min cut?
The max-flow min-cut theorem states that the maximum flow through any network from a given source to a given sink is exactly equal to the minimum sum of a cut. This theorem can be verified using the Ford-Fulkerson algorithm. This algorithm finds the maximum flow of a network or graph.
What is cut and Mincut?
In graph theory, a minimum cut or min-cut of a graph is a cut (a partition of the vertices of a graph into two disjoint subsets) that is minimal in some metric.