cur_metric.objective = optimizer.param_groups[0]["obj_k_1"][0].data.clone() IndexError: list index out of range

[SP-FA]

I'm getting the following error when I run python dreamplace/placer.py test/ispd2005/adaptec1.json on the circuit_trainin branch:

========================================================
                       DREAMPlace
            Yibo Lin (http://yibolin.com)
   David Z. Pan (http://users.ece.utexas.edu/~dpan)
========================================================
[INFO   ] DREAMPlace - parameters = {'aux_input': '/home/yzc/git_repo/DREAMPlace/install/benchmarks/ispd2005/adaptec1/adaptec1.aux', 'lef_input': '', 'def_input': '', 'verilog_input': '', 'gpu': 1, 'num_bins_x': 512, 'num_bins_y': 512, 'global_place_stages': [{'num_bins_x': 512, 'num_bins_y': 512, 'iteration': 1000, 'learning_rate': 0.01, 'wirelength': 'weighted_average', 'optimizer': 'nesterov', 'Llambda_density_weight_iteration': 1, 'Lsub_iteration': 1}], 'target_density': 1.0, 'density_weight': 8e-05, 'random_seed': 1000, 'result_dir': 'results', 'scale_factor': 1.0, 'shift_factor': [0.0, 0.0], 'ignore_net_degree': 100, 'gp_noise_ratio': 0.025, 'enable_fillers': 1, 'global_place_flag': 1, 'legalize_flag': 1, 'detailed_place_flag': 1, 'stop_overflow': 0.07, 'dtype': 'float32', 'detailed_place_engine': '', 'detailed_place_command': '', 'plot_flag': 0, 'RePlAce_ref_hpwl': 350000, 'RePlAce_LOWER_PCOF': 0.95, 'RePlAce_UPPER_PCOF': 1.05, 'gamma': 4.0, 'RePlAce_skip_energy_flag': 0, 'random_center_init_flag': 1, 'sort_nets_by_degree': 0, 'num_threads': 8, 'dump_global_place_solution_flag': 0, 'dump_legalize_solution_flag': 0, 'routability_opt_flag': 0, 'route_num_bins_x': 512, 'route_num_bins_y': 512, 'node_area_adjust_overflow': 0.15, 'max_num_area_adjust': 3, 'adjust_nctugr_area_flag': 0, 'adjust_rudy_area_flag': 1, 'adjust_pin_area_flag': 1, 'area_adjust_stop_ratio': 0.01, 'route_area_adjust_stop_ratio': 0.01, 'pin_area_adjust_stop_ratio': 0.05, 'unit_horizontal_capacity': 1.5625, 'unit_vertical_capacity': 1.45, 'unit_pin_capacity': 0.058, 'max_route_opt_adjust_rate': 2.0, 'route_opt_adjust_exponent': 2.0, 'pin_stretch_ratio': 1.414213562, 'max_pin_opt_adjust_rate': 1.5, 'deterministic_flag': 0, 'circuit_training_mode': 0}
[WARNING] DEF input file not specified, cannot output DEF file; set to DEFSIMPLE
[INFO   ] lef_input = 
[INFO   ] def_input = 
[INFO   ] verilog_input = 
[INFO   ] bookshelf_aux_input = /home/yzc/git_repo/DREAMPlace/install/benchmarks/ispd2005/adaptec1/adaptec1.aux
[INFO   ] bookshelf_pl_input = 
[INFO   ] def_size_input = 
[INFO   ] def_output = -out.def
[INFO   ] rpt_output = 
[INFO   ] target_util = 0
[INFO   ] max_displace = 0
[INFO   ] bin size = (10, 10) #rows
[INFO   ] sbin size = (5, 5) #rows
[INFO   ] bin_space_threshold = 0.2
[INFO   ] abu = 2,10 5,5 10,2 20,1 
[INFO   ] def_ignore_cells = 
[INFO   ] macro_obs_aware_layers = 
[INFO   ] enable_place = true
[INFO   ] enable_legalize = true
[INFO   ] evaluate_overlap = false
[INFO   ] move_multi_row_cell = true
[INFO   ] align_power_line = true
[INFO   ] cluster_cell = false
[INFO   ] sort_nets_by_degree = false
[INFO   ] file_format = BOOKSHELF
[INFO   ] max_iters = 6
[WARNING] no DEF file specified
[WARNING] no Verilog file specified
[INFO   ] reading /home/yzc/git_repo/DREAMPlace/install/benchmarks/ispd2005/adaptec1/adaptec1.aux
[WARNING] no additional Bookshelf .pl file specified
[WARNING] 20285 nets with 24352 pins from same nodes
[WARNING] 4210 nets should be ignored due to not enough pins
[INFO   ] sort nodes in the order of movable and fixed
[INFO   ] Group cells for fence regions
[INFO   ] Construct 0 groups
[INFO   ] Fence region groups done
[DEBUG  ] num_terminals 543, numFixed 543, numPlaceBlockages 0, num_terminal_NIs 0
[DEBUG  ] fixed area overlap: 4.91641e+07 fixed area total: 6.4094e+07, space area = 6.50265e+07
[INFO   ] DREAMPlace - set shift_factor = (459, 459), as original row bbox = (459, 459, 11151, 11139)
[INFO   ] DREAMPlace - set scale_factor = 1, as site_width = 1
[INFO   ] DREAMPlace - shift coordinate system by (459, 459), scale coordinate system by 1
[INFO   ] DREAMPlace - 
================================= Benchmark Statistics =================================
#nodes = 211447, #terminals = 543, # terminal_NIs = 0, #movable = 210904, #nets = 221142
die area = (0, 0, 10692, 10680) 1.14191e+08
row height = 12, site width = 1
num_bins = 512x512, bin sizes = 1.74023x1.73828
#pins = 919701, #movable_pins = 905028
total_movable_node_area = 3.72863e+07, total_fixed_node_area = 4.91641e+07, total_space_area = 6.50265e+07
utilization = 0.573402, target_density = 1
use placeable_area = 6.50265e+07 to compute fillers
total_filler_node_area = 2.77402e+07, #fillers = 160067, filler sizes = 14.442x12
========================================================================================
[INFO   ] DREAMPlace - reading benchmark takes 2.88953 seconds
[INFO   ] DREAMPlace - reading database takes 2.89 seconds
[INFO   ] DREAMPlace - move cells to the center of layout with random noise
[WARNING] DREAMPlace - net weights are all the same, ignored
[INFO   ] DREAMPlace - non-linear placement initialization takes 0.19 seconds
[INFO   ] DREAMPlace - 512x512 bins #bins 512x512, bin sizes 1.74023x1.73828, max_num_bins = 6, padding = 0
[INFO   ] dreamplace.ops.electric_potential.electric_potential - regard 0 cells as movable macros in global placement
[WARNING] DREAMPlace - quadratic density penalty is disabled, density weight update is forced to be based on HPWL
[INFO   ] DREAMPlace - use nesterov optimizer
[INFO   ] DREAMPlace - add 2.5% noise
[INFO   ] dreamplace.ops.electric_potential.electric_potential - fixed density map: average 187.546, max 435.602, bin area 435.602
[INFO   ] DREAMPlace - nesterov initialization takes 0.0860898 seconds
[INFO   ] DREAMPlace - density_weight = 7.495676E-12
[INFO   ] DREAMPlace - optimizer step 0.042 ms
Traceback (most recent call last):
  File "/home/yzc/git_repo/DREAMPlace-circuit_training/install/dreamplace/Placer.py", line 174, in <module>
    place(params)
  File "/home/yzc/git_repo/DREAMPlace-circuit_training/install/dreamplace/Placer.py", line 47, in place
    metrics = placer(params, placedb)
  File "/home/yzc/git_repo/DREAMPlace-circuit_training/install/dreamplace/NonLinearPlace.py", line 449, in __call__
    one_descent_step(
  File "/home/yzc/git_repo/DREAMPlace-circuit_training/install/dreamplace/NonLinearPlace.py", line 316, in one_descent_step
    cur_metric.objective = optimizer.param_groups[0]["obj_k_1"][0].data.clone()
IndexError: list index out of range

But it can running successfully on the master branch.

I add the parameter set_to_none=False at NonLinearPlace.py L277 and then it can finish without issues. I want to know if this is the correct method of correction. Is it？

My environment is: Ubuntu 22.0.4 Python 3.9.18 PyTorch 2.0.1

[zhuhanqing]

Hi, this error is because pytorch 2.0 will set set_to_none=True by default, while it is not desired in our code. You should add set_to_none=False or replace the optimizer.zero_grad() to the following to keep compatibility for different pytorch versions.

# For backward compatibility
                    # PyTorch 1.7 introduced zero_grad(set_to_none=False)
                    # PyTorch 2.0 changed set_to_none=True
                    if "set_to_none" in inspect.signature(optimizer.zero_grad).parameters: 
                        optimizer.zero_grad(set_to_none=False)
                    else:
                        optimizer.zero_grad()