ChipletPart

ChipletPart is an efficient framework designed for partitioning driven by chiplets technology. It aids in organizing and optimizing the design and layout of chiplets within a semiconductor module. An example of an SoC netlist is the Mempool testcase.

Overall Flow

The overall flow is shown below: .

Review Directions

The source codes to ChipletPart are in the directory graph_part
The testcases are uploaded in the directory test_data
The netlist generator file is implemented in the script generateSystemDefinition.py available in the directory test_case_gen To generate a testcase wih Z wafer scale, A tiles, B cores, C shared memories, D area scale and E power scale, we run the script: python3 systemSystemDefinition.py Z A B C D E
ChipletPart has depencies on METIS, PugiXML, Eigen, Boost, OpenMP and GKLib.
The run scripts are uploaded in the parent directory.

List of testcases

Benchmark	# Tiles	# IP Blocks	Area (mm²)	Area Scaling	Power Scaling
WS₁	1	48	1582 (45nm)	1600	1600
WS₂	2	96	3165 (45nm)	1600	1600
WS₃	4	192	6330 (45nm)	1600	1600
WS₄	8	384	12,660 (45nm)	1600	1600
MP	16	40	494 (45nm)	100	100
ADI₁	N/A	14	567 (16nm)	16	16
ADI₂	N/A	17	567 (16nm)	16	16
EPYC	N/A	32	148 (7nm)	1	1
GA100	N/A	180	548 (7nm)	1	1

Note: MP and WS benchmarks use tile terminology; the other benchmarks do not.

Some examples to run the test_case generator is below:

To generate the WS_1 netlist run python3 generateSystemDefinition ws-48 1 14 4 1600 1600
To generate the WS_2 netlist run python3 generateSystemDefinition.py ws-48 2 14 4 1600 1600
To generate the WS_3 netlist run python3 generateSystemDefinition.py ws-48 4 14 4 1600 1600
To generate the WS_4 netlist run python3generateSystemDefinition.py ws-48 8 14 4 1600 1600

Building ChipletPart

Follow these steps to build the ChipletPart from the source:

Prerequisites

Ensure you have CMake 3.10 or higher and a suitable (9.3.0 or higher) C++ compiler installed on your system.

Build Instructions

Create and Enter Build Directory:
```
mkdir build && cd build
```
Generate Makefiles: cmake ..
Compile the Project: make -j 40 # Adjust the number 40 according to the number of cores you wish to use for a faster build process
Run the run-script ./run_chiplet_test.sh ga100 --seed 1
Our cost model implementation is available in the cost_model directory.

ChipletPart operates in three modes: (1) homogeneous, (2) heterogeneous and (3) evaluation.

Homogeneous mode

In this mode ChipletPart works with a single technology node. To run in homogeneous mode do the following: ./run_chiplet_test.sh ga100 --seed 1 To change the technology node, modify the default tech variable in run_chiplet_test.sh, e.g., DEFAULT_TECH="7nm"

Sample output

Running standard partitioning for test case: adi_sku3_1x
Tech node: 7nm
[INFO] Random seed set to 1

------------------------------------------------------------
            ChipletPart Partitioner / Evaluator             
                        Version: 1.0                        
------------------------------------------------------------
Developed by: UC San Diego and UC Los Angeles               
------------------------------------------------------------

[INFO] Random seed set to 1
[INFO] Partitioning using XML input files

Reading Chiplet Files and Generating Hypergraph
Parameter                     Value                                             
--------------------------------------------------------------------------------
IO file                       /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/adi_sku3_1x/io_definitions.xml
Layer file                    /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/adi_sku3_1x/layer_definitions.xml
Wafer process file            /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/adi_sku3_1x/wafer_process_definitions.xml
Assembly process file         /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/adi_sku3_1x/assembly_process_definitions.xml
Test file                     /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/adi_sku3_1x/test_definitions.xml
Netlist file                  /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/adi_sku3_1x/block_level_netlist.xml
Blocks file                   /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/adi_sku3_1x/block_definitions.txt
Reach                         0.500000                                          
Separation                    0.250000                                          
Technology                    7nm           
[==================================================] 100%
[SUCCESS] Parallel floorplanning and refinement completed in 17 seconds

Best Partition Results
Metric                        Value                         
------------------------------------------------------------
Partition index               6                             
Number of parts               4                             
Cost                          50.790554                     
Feasibility                   Yes                           
Aspect Ratios                 [4.677498, 0.338730, 0.200000, 0.200000]

Top 3 Partition Results by Cost:
Rank      Partition Index     Parts     Cost                Feasible  
----------------------------------------------------------------------
1         6                   4         50.790554           Yes       
2         7                   4         51.204288           Yes       
3         3                   2         52.260674           Yes       

[SUCCESS] Best partition saved to /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/adi_sku3_1x/block_level_netlist.xml.cpart.4

Timing Summary
Stage                                   Time (seconds)      
------------------------------------------------------------
Parallel floorplanning and refinement   17                  
Total partitioning process              17.163105           

[SUCCESS] Partitioning completed successfully
Test completed successfully!

Heterogeneous mode

ChipletPart can handle multiple technology nodes -- in this case it will run the genetic algorithm. ./run_chiplet_test.sh ga100 --genetic --tech-nodes 7nm,10nm,45nm --seed 1

Sample output

./run_chiplet_test.sh ga100 --genetic --tech-nodes 7nm,10nm,45nm --seed 1

Running genetic tech partitioning for test case: adi_sku3_1x
Tech nodes: 7nm,10nm,45nm
Generations: 50, Population size: 50
/home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/build/bin/chipletPart /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/adi_sku3_1x/io_definitions.xml /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/adi_sku3_1x/layer_definitions.xml /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/adi_sku3_1x/wafer_process_definitions.xml /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/adi_sku3_1x/assembly_process_definitions.xml /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/adi_sku3_1x/test_definitions.xml /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/adi_sku3_1x/block_level_netlist.xml /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/adi_sku3_1x/block_definitions.txt 0.50 0.25 --genetic-tech-part --tech-nodes 7nm,10nm,45nm --generations 50 --population 50 --seed 1
[INFO] Random seed set to 1

------------------------------------------------------------
            ChipletPart Partitioner / Evaluator             
                        Version: 1.0                        
------------------------------------------------------------
Developed by: UC San Diego and UC Los Angeles               
------------------------------------------------------------

[INFO] Random seed set to 1
[INFO] Converting netlist XML to hypergraph...
[INFO] Created hypergraph with 11 vertices and 20 hyperedges
[INFO] Number of IP blocks in chiplet graph: 11
[INFO] Number of nets in chiplet graph: 20
[INFO] Wrote vertex mapping to output.map

Running Enhanced Genetic Algorithm for Co-optimization
Parameter                     Value                                             
--------------------------------------------------------------------------------
IO file                       /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/adi_sku3_1x/io_definitions.xml
Layer file                    /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/adi_sku3_1x/layer_definitions.xml
Wafer process file            /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/adi_sku3_1x/wafer_process_definitions.xml
Assembly process file         /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/adi_sku3_1x/assembly_process_definitions.xml
Test file                     /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/adi_sku3_1x/test_definitions.xml
Netlist file                  /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/adi_sku3_1x/block_level_netlist.xml
Blocks file                   /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/adi_sku3_1x/block_definitions.txt
Reach                         0.500000                                          
Separation                    0.250000                                          
Population Size               50                                                
Number of Generations         50                                                
Mutation Rate                 0.200000                                          
Crossover Rate                0.650000                                          
Min Partitions                1                                                 
Max Partitions                8                                                 
Output Prefix                 genetic_tech_part                                 
Random Seed                   1                                                 

[INFO] Creating GeneticTechPartitioner with hypergraph containing 11 vertices and 20 hyperedges

Genetic Tech Partitioner Initialized
Parameter                     Value               
--------------------------------------------------
Hypergraph Vertices           11                  
Hypergraph Hyperedges         20                  
Available Technologies        3                   
Random Seed                   1                   
Generations                   50                  
Population Size               50                  
Mutation Rate                 0.200000            
Crossover Rate                0.650000            
Min Partitions                1                   
Max Partitions                8                   

[INFO] Running genetic algorithm...
Genetic Algorithm Results
Metric                        Value               
--------------------------------------------------
Best Cost                     43.749119           
Number of Partitions          6                   
Valid Solution                Yes                 
Execution Time (ms)           21384               

Technology Assignment
Partition                     Technology          
--------------------------------------------------
0                             7nm                 
1                             7nm                 
2                             7nm                 
3                             10nm                
4                             10nm                
5                             7nm                 


Genetic Algorithm Results
Metric                        Value                                             
--------------------------------------------------------------------------------
Best Cost                     43.749119                                         
Number of Partitions          6                                                 
Valid Solution                Yes                                               
Execution Time (seconds)      21

Evaluation mode

ChipletPart can also evaluate a given partition solution. It will first floorplan it and then evaluate it with its cost model. ./run_evaluator.sh ga100 -- you can mention the partition file with the script variable HYPERGRAPH_PART.

Sample output

./run_evaluator.sh ga100 --seed 1

Running evaluator with the following parameters:
Partition file:        /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/ga100/manual.part
IO file:               /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/ga100/io_definitions.xml
Layer file:            /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/ga100/layer_definitions.xml
Wafer process file:    /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/ga100/wafer_process_definitions.xml
Assembly process file: /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/ga100/assembly_process_definitions.xml
Test file:             /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/ga100/test_definitions.xml
Netlist file:          /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/ga100/block_level_netlist.xml
Blocks file:           /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/ga100/block_definitions.txt
Reach:                 0.50
Separation:            0.25
Technology:            7nm

Executing evaluation...

------------------------------------------------------------
         ChipletPart Partitioner / Evaluator             
                     Version: 1.0                        
------------------------------------------------------------
Developed by: UC San Diego and UC Los Angeles               
------------------------------------------------------------

[INFO] Evaluating partition
[INFO] Reading chiplet files and generating hypergraph representation
[INFO] Partition file: /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/ga100/manual.part
[INFO] IO file: /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/ga100/io_definitions.xml
[INFO] Layer file: /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/ga100/layer_definitions.xml
[INFO] Wafer process file: /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/ga100/wafer_process_definitions.xml
[INFO] Assembly process file: /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/ga100/assembly_process_definitions.xml
[INFO] Test file: /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/ga100/test_definitions.xml
[INFO] Netlist file: /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/ga100/block_level_netlist.xml
[INFO] Blocks file: /home/fetzfs_projects/TritonPart/bodhi/branch_chiplet/branch_JETCAS/ChipletPart/test_data/ga100/block_definitions.txt
[INFO] Reach: 0.5
[INFO] Separation: 0.25
[INFO] Tech: 7nm
[INFO] Converting netlist XML to hypergraph...
[INFO] Created hypergraph with 180 vertices and 400 hyperedges
[INFO] Number of IP blocks in chiplet graph: 180
[INFO] Number of nets in chiplet graph: 400
[INFO] Number of partitions: 2
[INFO] Creating ChipletRefiner with cost model files to test initialization
[SUCCESS] Cost model was successfully initialized in the ChipletRefiner constructor
Cost: 34.6704, Power: 0
[INFO] Cost of partition is 34.670376
[INFO] Number of partitions is 2
[INFO] Floorplan feasibility is 1
Evaluation completed successfully

Usage Directions

Usage: ./run_chiplet_test.sh <test_case_name> [options]

Options:
--reach <value>       Specify reach value (default: 0.50)
--separation <value>  Specify separation value (default: 0.25)
--tech <node>         Specify tech node for standard partitioning (default: 7nm)
--seed <value>        Specify random seed (default: 42)
--genetic             Use genetic tech partitioning algorithm
--tech-nodes <nodes>  Specify comma-separated list of tech nodes for genetic partitioning
                      Example: --tech-nodes 7nm,10nm,14nm,28nm
--generations <num>   Specify number of generations for genetic algorithm (default: 50)
--population <num>    Specify population size for genetic algorithm (default: 50)
--help                Display this help message

Examples:
./run_chiplet_test.sh design1 --tech 5nm
./run_chiplet_test.sh design2 --genetic --tech-nodes 7nm,10nm,14nm --seed 123

Name		Name	Last commit message	Last commit date
Latest commit History 14 Commits
GKlib		GKlib
METIS		METIS
cost_model		cost_model
floorplet-part		floorplet-part
include		include
lib		lib
src		src
test_case_gen		test_case_gen
test_data		test_data
CMakeLists.txt		CMakeLists.txt
ChipletPart_flow_new.png		ChipletPart_flow_new.png
LICENSE		LICENSE
README.md		README.md
README_canonical_ga.md		README_canonical_ga.md
README_compositional.md		README_compositional.md
chipletpart_overall_framework.png		chipletpart_overall_framework.png
chipletpart_overall_v5.png		chipletpart_overall_v5.png
compositional_example.sh		compositional_example.sh
compositional_partitioner.sh		compositional_partitioner.sh
compositional_utils.py		compositional_utils.py
convert_floorplet_partition.sh		convert_floorplet_partition.sh
find_best_floorplet.sh		find_best_floorplet.sh
gen_plots.py		gen_plots.py
gen_plots_updated.py		gen_plots_updated.py
gen_sensitivity.py		gen_sensitivity.py
generate_genetic_jobs.sh		generate_genetic_jobs.sh
generate_jobs.sh		generate_jobs.sh
run_canonical_ga.sh		run_canonical_ga.sh
run_canonical_ga_parallel.sh		run_canonical_ga_parallel.sh
run_case_studies.sh		run_case_studies.sh
run_chiplet_part.sh		run_chiplet_part.sh
run_chiplet_test.sh		run_chiplet_test.sh
run_core_partition_parallel.sh		run_core_partition_parallel.sh
run_evaluator.sh		run_evaluator.sh
run_evaluator_floorplet.sh		run_evaluator_floorplet.sh
run_tech_enum_all.sh		run_tech_enum_all.sh
run_tech_enum_parallel.sh		run_tech_enum_parallel.sh
setup_test_cases.sh		setup_test_cases.sh
setup_test_data.sh		setup_test_data.sh
submit_job.sh		submit_job.sh
test_canonical_ga.sh		test_canonical_ga.sh
xml_to_hypergraph.py		xml_to_hypergraph.py

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ChipletPart

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