experiments/elasticdnn/bert_base/online/pos/model.py

from typing import List
from data.dataloader import build_dataloader
# from methods.elasticdnn.api.online_model import ElasticDNN_OnlineModel
from methods.elasticdnn.api.online_model_v2 import ElasticDNN_OnlineModel

import torch
import sys
from torch import nn
from methods.elasticdnn.api.model import ElasticDNN_OfflineSegFMModel, ElasticDNN_OfflineSegMDModel
from methods.elasticdnn.api.algs.md_pretraining_wo_fbs import ElasticDNN_MDPretrainingWoFBSAlg
from methods.elasticdnn.model.base import ElasticDNNUtil
from methods.elasticdnn.pipeline.offline.fm_to_md.base import FM_to_MD_Util
from methods.elasticdnn.pipeline.offline.fm_to_md.vit import FM_to_MD_ViT_Util
from methods.elasticdnn.pipeline.offline.fm_lora.base import FMLoRA_Util
from methods.elasticdnn.pipeline.offline.fm_lora.vit import FMLoRA_ViT_Util
from methods.elasticdnn.model.bert import ElasticBertUtil
from utils.common.file import ensure_dir
from utils.dl.common.model import LayerActivation, get_module, get_parameter
from utils.common.exp import save_models_dict_for_init, get_res_save_dir
from data import build_scenario
from utils.dl.common.loss import CrossEntropyLossSoft
import torch.nn.functional as F
from utils.dl.common.env import create_tbwriter
import os
from utils.common.log import logger
from utils.common.data_record import write_json
# from methods.shot.shot import OnlineShotModel
from methods.feat_align.main import OnlineFeatAlignModel, FeatAlignAlg
import tqdm
from methods.feat_align.mmd import mmd_rbf

class ElasticDNN_POSOnlineModel(ElasticDNN_OnlineModel):
    def get_accuracy(self, test_loader, *args, **kwargs):
        acc = 0
        sample_num = 0
        
        self.to_eval_mode()
        
        with torch.no_grad():
            pbar = tqdm.tqdm(enumerate(test_loader), total=len(test_loader), dynamic_ncols=True, leave=False)
            for batch_index, (x, y) in pbar:
                for k, v in x.items():
                    if isinstance(v, torch.Tensor):
                        x[k] = v.to(self.device)
                # print(x)
                y = y.to(self.device)
                output = self.infer(x)
                
                # torch.Size([16, 512, 43]) torch.Size([16, 512])
                
                for oi, yi, xi in zip(output, y, x['input_ids']):
                    # oi: 512, 43; yi: 512
                    seq_len = xi.nonzero().size(0)
                    
                    # print(output.size(), y.size())
                    
                    pred = F.softmax(oi, dim=-1).argmax(dim=-1)
                    correct = torch.eq(pred[1: seq_len], yi[1: seq_len]).sum().item()
                    
                    # print(output.size(), y.size())
                    
                    acc += correct
                    sample_num += seq_len
                
                    # pbar.set_description(f'seq_len: {seq_len}, cur_seq_acc: {(correct / seq_len):.4f}')

        acc /= sample_num
        return acc
    
    def get_elastic_dnn_util(self) -> ElasticDNNUtil:
        return ElasticBertUtil()
    
    def get_fm_matched_param_of_md_param(self, md_param_name):
        # only between qkv.weight, norm.weight/bias
        self_param_name = md_param_name
        fm = self.models_dict['fm']
        if any([k in self_param_name for k in ['fbs', 'ab', 'embeddings']]):
            return None
        
        p = get_parameter(self.models_dict['md'], self_param_name)
        if p.dim() == 0:
            return None
        elif p.dim() == 1 and 'LayerNorm' in self_param_name and 'weight' in self_param_name:
            return get_parameter(fm, self_param_name)
        
        # 1. xx.qkv.to_qkv.yy to xx.qkv.qkv.aa and xx.qkv.abs.zz
        if ('query' in self_param_name or 'key' in self_param_name or \
            'value' in self_param_name) and ('weight' in self_param_name):
            
            ss = self_param_name.split('.')
            
            fm_qkv_name = '.'.join(ss[0: -1]) + '.fc'
            fm_qkv = get_module(fm, fm_qkv_name)
            
            fm_abs_name = '.'.join(ss[0: -1]) + '.ab'
            fm_abs = get_module(fm, fm_abs_name)
            
            # NOTE: unrecoverable operation! multiply LoRA parameters to allow it being updated in update_fm_param()
            # TODO: if fm will be used for inference, _mul_lora_weight will not be applied!
            if not hasattr(fm_abs, '_mul_lora_weight'):
                logger.debug(f'set _mul_lora_weight in {fm_abs_name}')
                setattr(fm_abs, '_mul_lora_weight', 
                        nn.Parameter(fm_abs[1].weight @ fm_abs[0].weight))
            
            return torch.cat([
                fm_qkv.weight.data, # task-agnositc params
                fm_abs._mul_lora_weight.data # task-specific params (LoRA)
            ], dim=0)
            
        # elif 'to_qkv.bias' in self_param_name:
        #     ss = self_param_name.split('.')
            
        #     fm_qkv_name = '.'.join(ss[0: -2]) + '.qkv.bias'
        #     return get_parameter(fm, fm_qkv_name)
            
        elif 'dense' in self_param_name and 'weight' in self_param_name:
            fm_param_name = self_param_name.replace('.linear', '')
            return get_parameter(fm, fm_param_name)

        # elif 'mlp.fc2' in self_param_name and 'weight' in self_param_name:
        #     fm_param_name = self_param_name
        #     return get_parameter(fm, fm_param_name)
        
        else:
            # return get_parameter(fm, self_param_name)
            return None
        
    def update_fm_param(self, md_param_name, cal_new_fm_param_by_md_param):
        if not ('query' in md_param_name or 'key' in md_param_name or 'value' in md_param_name):
            matched_fm_param_ref = self.get_fm_matched_param_of_md_param(md_param_name)
            matched_fm_param_ref.copy_(cal_new_fm_param_by_md_param)
        else:
            new_fm_attn_weight, new_fm_lora_weight = torch.chunk(cal_new_fm_param_by_md_param, 2, 0)
            
            ss = md_param_name.split('.')
            fm = self.models_dict['fm']
            
            # update task-agnostic parameters
            fm_qkv_name = '.'.join(ss[0: -1]) + '.fc'
            fm_qkv = get_module(fm, fm_qkv_name)
            fm_qkv.weight.data.copy_(new_fm_attn_weight)
            
            # update task-specific parameters
            fm_abs_name = '.'.join(ss[0: -1]) + '.ab'
            fm_abs = get_module(fm, fm_abs_name)
            fm_abs._mul_lora_weight.data.copy_(new_fm_lora_weight) # TODO: this will not be applied in inference!
        
    def get_md_matched_param_of_fm_param(self, fm_param_name):
        return super().get_md_matched_param_of_fm_param(fm_param_name)
    
    def get_md_matched_param_of_sd_param(self, sd_param_name):
        # raise NotImplementedError

        # only between qkv.weight, norm.weight/bias
        self_param_name = sd_param_name
        md = self.models_dict['md']
        if any([k in self_param_name for k in ['fbs', 'ab', 'embeddings']]):
            return None
        
        p = get_parameter(self.models_dict['sd'], self_param_name)
        if p.dim() == 0:
            return None
        elif p.dim() == 1 and 'LayerNorm' in self_param_name and 'weight' in self_param_name:
            return get_parameter(md, self_param_name)
        
        # 1. xx.qkv.to_qkv.yy to xx.qkv.qkv.aa and xx.qkv.abs.zz
        if ('query' in self_param_name or 'key' in self_param_name or \
            'value' in self_param_name) and ('weight' in self_param_name):
            
        
            return get_parameter(md, self_param_name) # NOTE: no fbs in qkv!
            
        # elif 'to_qkv.bias' in self_param_name:
        #     ss = self_param_name.split('.')
            
        #     fm_qkv_name = '.'.join(ss[0: -2]) + '.qkv.bias'
        #     return get_parameter(fm, fm_qkv_name)
            
        elif 'intermediate.dense.0.weight' in self_param_name:
            fm_param_name = '.'.join(self_param_name.split('.')[0: -2]) + '.linear.weight'
            return get_parameter(md, fm_param_name)

        elif 'output.dense' in self_param_name and 'weight' in self_param_name:
            fm_param_name = self_param_name
            return get_parameter(md, fm_param_name)
        
        else:
            # return get_parameter(fm, self_param_name)
            return None
    
    def get_task_head_params(self):
        head = get_module(self.models_dict['sd'], 'classifier')
        return list(head.parameters())
    
class POSOnlineFeatAlignModel(OnlineFeatAlignModel):
    def get_trained_params(self):
        qkv_and_norm_params = [p for n, p in self.models_dict['main'].named_parameters() if 'query' in n or 'key' in n or 'value' in n or 'dense' in n or 'LayerNorm' in n]
        return qkv_and_norm_params
    
    def get_feature_hook(self):
        return LayerActivation(get_module(self.models_dict['main'], 'classifier'), False, self.device)
    
    def forward_to_get_task_loss(self, x, y):
        self.to_train_mode()
        o = self.infer(x)
        return F.cross_entropy(o.view(-1, o.size(-1)), y.view(-1))
    
    def get_mmd_loss(self, f1, f2):
        # print(f1.size())
        # return mmd_rbf(f1.mean(1).flatten(1), f2.mean(1).flatten(1))
        return mmd_rbf(f1.flatten(1), f2.flatten(1))
    
    def infer(self, x, *args, **kwargs):
        return self.models_dict['main'](**x)
    
    def get_accuracy(self, test_loader, *args, **kwargs):
        acc = 0
        sample_num = 0
        
        self.to_eval_mode()
        
        with torch.no_grad():
            pbar = tqdm.tqdm(enumerate(test_loader), total=len(test_loader), dynamic_ncols=True, leave=False)
            for batch_index, (x, y) in pbar:
                for k, v in x.items():
                    if isinstance(v, torch.Tensor):
                        x[k] = v.to(self.device)
                # print(x)
                y = y.to(self.device)
                output = self.infer(x)
                
                # torch.Size([16, 512, 43]) torch.Size([16, 512])
                
                for oi, yi, xi in zip(output, y, x['input_ids']):
                    # oi: 512, 43; yi: 512
                    seq_len = xi.nonzero().size(0)
                    
                    # print(output.size(), y.size())
                    
                    pred = F.softmax(oi, dim=-1).argmax(dim=-1)
                    correct = torch.eq(pred[1: seq_len], yi[1: seq_len]).sum().item()
                    
                    # print(output.size(), y.size())
                    
                    acc += correct
                    sample_num += seq_len
                
                    # pbar.set_description(f'seq_len: {seq_len}, cur_seq_acc: {(correct / seq_len):.4f}')

        acc /= sample_num
        return acc