readme: ### Reproducibility
  ```bash
  # 1. install nncf
  # checkout nncf 9c2845eeb38b4ab1b6d4ca19e31a1886e5bdf17c
  # patch b/nncf/torch/sparsity/magnitude/algo.py
   
      def sparsify_params(self):
          from collections import OrderedDict
          sparse_sd = OrderedDict()
          with torch.no_grad():    
              for sparse_info in self.sparsified_module_info:
                  for n, m in self.model.named_modules():
                      if m == sparse_info.module:
                          sparse_sd[n+'.weight'] = m.weight*sparse_info.operand.binary_mask
  
          model_sd = self.model.state_dict()
          for k, v in sparse_sd.items():
              assert k in model_sd, "key not exists!"
              model_sd[k] = sparse_sd[k]
          self.model.load_state_dict(model_sd)
  
  
  # 2. transformers fork
  git clone https://github.com/vuiseng9/transformers
  cd transformers && git checkout gen-hybrid-sparse
  
  # 3. follow 
  # transformers/examples/pytorch/question-answering/gen-hybrid-sparse/vscode-launch.json
  ```
  
  ### Key Content
  ```
  gen_hybrid_sparse
  ├── 90pc_sparse-02_head-0512_ffnn
  │   ├── 90pc_sparse-02_head-0512_ffnn-8bit.onnx
  │   ├── ir
  │   │   ├── 90pc_sparse-02_head-0512_ffnn-8bit.bin
  │   │   ├── 90pc_sparse-02_head-0512_ffnn-8bit.mapping
  │   │   ├── 90pc_sparse-02_head-0512_ffnn-8bit.xml
  ├── 90pc_sparse-04_head-1024_ffnn
  │   ├── 90pc_sparse-04_head-1024_ffnn-8bit.onnx
  │   ├── ir
  │   │   ├── 90pc_sparse-04_head-1024_ffnn-8bit.bin
  │   │   ├── 90pc_sparse-04_head-1024_ffnn-8bit.mapping
  │   │   ├── 90pc_sparse-04_head-1024_ffnn-8bit.xml
  ├── 90pc_sparse-06_head-1536_ffnn
  │   ├── 90pc_sparse-06_head-1536_ffnn-8bit.onnx
  │   ├── ir
  │   │   ├── 90pc_sparse-06_head-1536_ffnn-8bit.bin
  │   │   ├── 90pc_sparse-06_head-1536_ffnn-8bit.mapping
  │   │   ├── 90pc_sparse-06_head-1536_ffnn-8bit.xml
  ├── 90pc_sparse-08_head-2048_ffnn
  │   ├── 90pc_sparse-08_head-2048_ffnn-8bit.onnx
  │   ├── ir
  │   │   ├── 90pc_sparse-08_head-2048_ffnn-8bit.bin
  │   │   ├── 90pc_sparse-08_head-2048_ffnn-8bit.mapping
  │   │   ├── 90pc_sparse-08_head-2048_ffnn-8bit.xml
  └── 90pc_unstructured_sparse
      ├── 90pc_unstructured_sparse-8bit.onnx
      └── ir
          ├── 90pc_unstructured_sparse-8bit.bin
          ├── 90pc_unstructured_sparse-8bit.mapping
          ├── 90pc_unstructured_sparse-8bit.xml
  ```
  
  