| 9 | |
| 10 | |
| 11 | class FlopsEst(object): |
| 12 | def __init__(self, model, input_shape=(2, 3, 224, 224), device='cpu'): |
| 13 | self.block_num = len(model.blocks) |
| 14 | self.choice_num = len(model.blocks[0]) |
| 15 | self.flops_dict = {} |
| 16 | self.params_dict = {} |
| 17 | |
| 18 | if device == 'cpu': |
| 19 | model = model.cpu() |
| 20 | else: |
| 21 | model = model.cuda() |
| 22 | |
| 23 | self.params_fixed = 0 |
| 24 | self.flops_fixed = 0 |
| 25 | |
| 26 | input = torch.randn(input_shape) |
| 27 | |
| 28 | flops, params = get_model_complexity_info( |
| 29 | model.conv_stem, (3, 224, 224), as_strings=False, print_per_layer_stat=False) |
| 30 | self.params_fixed += params / 1e6 |
| 31 | self.flops_fixed += flops / 1e6 |
| 32 | |
| 33 | input = model.conv_stem(input) |
| 34 | |
| 35 | for block_id, block in enumerate(model.blocks): |
| 36 | self.flops_dict[block_id] = {} |
| 37 | self.params_dict[block_id] = {} |
| 38 | for module_id, module in enumerate(block): |
| 39 | self.flops_dict[block_id][module_id] = {} |
| 40 | self.params_dict[block_id][module_id] = {} |
| 41 | for choice_id, choice in enumerate(module): |
| 42 | flops, params = get_model_complexity_info(choice, tuple( |
| 43 | input.shape[1:]), as_strings=False, print_per_layer_stat=False) |
| 44 | # Flops(M) |
| 45 | self.flops_dict[block_id][module_id][choice_id] = flops / 1e6 |
| 46 | # Params(M) |
| 47 | self.params_dict[block_id][module_id][choice_id] = params / 1e6 |
| 48 | |
| 49 | input = choice(input) |
| 50 | |
| 51 | # conv_last |
| 52 | flops, params = get_model_complexity_info(model.global_pool, tuple( |
| 53 | input.shape[1:]), as_strings=False, print_per_layer_stat=False) |
| 54 | self.params_fixed += params / 1e6 |
| 55 | self.flops_fixed += flops / 1e6 |
| 56 | |
| 57 | input = model.global_pool(input) |
| 58 | |
| 59 | # globalpool |
| 60 | flops, params = get_model_complexity_info(model.conv_head, tuple( |
| 61 | input.shape[1:]), as_strings=False, print_per_layer_stat=False) |
| 62 | self.params_fixed += params / 1e6 |
| 63 | self.flops_fixed += flops / 1e6 |
| 64 | |
| 65 | # return params (M) |
| 66 | def get_params(self, arch): |
| 67 | params = 0 |
| 68 | for block_id, block in enumerate(arch): |