add verbosity option for resize_lora.py

add --verbose flag to print additional statistics during resize_lora function
correct some parameter references in resize_lora_model function

networks/resize_lora.py

@@ -38,9 +38,10 @@ def save_to_file(file_name, model, state_dict, dtype, metadata):
     torch.save(model, file_name)
 
 
-def resize_lora_model(lora_sd, new_rank, save_dtype, device):
+def resize_lora_model(lora_sd, new_rank, save_dtype, device, verbose):
   network_alpha = None
   network_dim = None
+  verbose_str = "\n"
 
   CLAMP_QUANTILE = 0.99
 
@@ -96,6 +97,12 @@ def resize_lora_model(lora_sd, new_rank, save_dtype, device):
 
         U, S, Vh = torch.linalg.svd(full_weight_matrix)
 
+        if verbose:
+          s_sum = torch.sum(torch.abs(S))
+          s_rank = torch.sum(torch.abs(S[:new_rank]))
+          verbose_str+=f"{block_down_name:76} | "
+          verbose_str+=f"sum(S) retained: {(s_rank)/s_sum:.1%}%, max(S) to max(S_dropped) ratio: {S[0]/S[new_rank]:0.1f}\n"
+
         U = U[:, :new_rank]
         S = S[:new_rank]
         U = U @ torch.diag(S)
@@ -113,7 +120,7 @@ def resize_lora_model(lora_sd, new_rank, save_dtype, device):
           U = U.unsqueeze(2).unsqueeze(3)
           Vh = Vh.unsqueeze(2).unsqueeze(3)
 
-        if args.device:
+        if device:
           U = U.to(org_device)
           Vh = Vh.to(org_device)
 
@@ -127,6 +134,8 @@ def resize_lora_model(lora_sd, new_rank, save_dtype, device):
         lora_up_weight = None
         weights_loaded = False
 
+  if verbose:
+    print(verbose_str)
   print("resizing complete")
   return o_lora_sd, network_dim, new_alpha
 
@@ -151,7 +160,7 @@ def resize(args):
   lora_sd, metadata = load_state_dict(args.model, merge_dtype)
 
   print("resizing rank...")
-  state_dict, old_dim, new_alpha = resize_lora_model(lora_sd, args.new_rank, save_dtype, args.device)
+  state_dict, old_dim, new_alpha = resize_lora_model(lora_sd, args.new_rank, save_dtype, args.device, args.verbose)
 
   # update metadata
   if metadata is None:
@@ -182,6 +191,8 @@ if __name__ == '__main__':
   parser.add_argument("--model", type=str, default=None,
                       help="LoRA model to resize at to new rank: ckpt or safetensors file / 読み込むLoRAモデル、ckptまたはsafetensors")
   parser.add_argument("--device", type=str, default=None, help="device to use, cuda for GPU / 計算を行うデバイス、cuda でGPUを使う")
+  parser.add_argument("--verbose", action="store_true", 
+                      help="Display verbose resizing information")
 
   args = parser.parse_args()
   resize(args)