diff --git a/fine_tune.py b/fine_tune.py
index be61b3d16..1b62783a2 100644
--- a/fine_tune.py
+++ b/fine_tune.py
@@ -2,7 +2,6 @@
 # XXX dropped option: hypernetwork training
 
 import argparse
-import gc
 import math
 import os
 from multiprocessing import Value
@@ -11,6 +10,8 @@
 from tqdm import tqdm
 import torch
 
+from library.device_utils import clean_memory
+
 try:
     import intel_extension_for_pytorch as ipex
 
@@ -163,9 +164,7 @@ def fn_recursive_set_mem_eff(module: torch.nn.Module):
         with torch.no_grad():
             train_dataset_group.cache_latents(vae, args.vae_batch_size, args.cache_latents_to_disk, accelerator.is_main_process)
         vae.to("cpu")
-        if torch.cuda.is_available():
-            torch.cuda.empty_cache()
-        gc.collect()
+        clean_memory()
 
         accelerator.wait_for_everyone()
 
diff --git a/gen_img_diffusers.py b/gen_img_diffusers.py
index be43847a6..6d72a22e8 100644
--- a/gen_img_diffusers.py
+++ b/gen_img_diffusers.py
@@ -66,6 +66,8 @@
 import numpy as np
 import torch
 
+from library.device_utils import clean_memory
+
 try:
     import intel_extension_for_pytorch as ipex
 
@@ -893,8 +895,7 @@ def __call__(
                     init_latent_dist = self.vae.encode(init_image).latent_dist
                     init_latents = init_latent_dist.sample(generator=generator)
                 else:
-                    if torch.cuda.is_available():
-                        torch.cuda.empty_cache()
+                    clean_memory()
                     init_latents = []
                     for i in tqdm(range(0, min(batch_size, len(init_image)), vae_batch_size)):
                         init_latent_dist = self.vae.encode(
@@ -1052,8 +1053,7 @@ def __call__(
         if vae_batch_size >= batch_size:
             image = self.vae.decode(latents).sample
         else:
-            if torch.cuda.is_available():
-                torch.cuda.empty_cache()
+            clean_memory()
             images = []
             for i in tqdm(range(0, batch_size, vae_batch_size)):
                 images.append(
diff --git a/library/device_utils.py b/library/device_utils.py
new file mode 100644
index 000000000..49af622bb
--- /dev/null
+++ b/library/device_utils.py
@@ -0,0 +1,9 @@
+import gc
+
+import torch
+
+
+def clean_memory():
+    if torch.cuda.is_available():
+        torch.cuda.empty_cache()
+    gc.collect()
diff --git a/library/sdxl_train_util.py b/library/sdxl_train_util.py
index 5ad748d15..e49a42e50 100644
--- a/library/sdxl_train_util.py
+++ b/library/sdxl_train_util.py
@@ -1,5 +1,4 @@
 import argparse
-import gc
 import math
 import os
 from typing import Optional
@@ -9,6 +8,7 @@
 from transformers import CLIPTokenizer
 from library import model_util, sdxl_model_util, train_util, sdxl_original_unet
 from library.sdxl_lpw_stable_diffusion import SdxlStableDiffusionLongPromptWeightingPipeline
+from library.device_utils import clean_memory
 
 TOKENIZER1_PATH = "openai/clip-vit-large-patch14"
 TOKENIZER2_PATH = "laion/CLIP-ViT-bigG-14-laion2B-39B-b160k"
@@ -47,8 +47,7 @@ def load_target_model(args, accelerator, model_version: str, weight_dtype):
                 unet.to(accelerator.device)
                 vae.to(accelerator.device)
 
-            gc.collect()
-            torch.cuda.empty_cache()
+            clean_memory()
         accelerator.wait_for_everyone()
 
     return load_stable_diffusion_format, text_encoder1, text_encoder2, vae, unet, logit_scale, ckpt_info
diff --git a/library/train_util.py b/library/train_util.py
index fae429edf..2b924846e 100644
--- a/library/train_util.py
+++ b/library/train_util.py
@@ -20,7 +20,6 @@
     Union,
 )
 from accelerate import Accelerator, InitProcessGroupKwargs, DistributedDataParallelKwargs
-import gc
 import glob
 import math
 import os
@@ -68,6 +67,7 @@
 # from library.attention_processors import FlashAttnProcessor
 # from library.hypernetwork import replace_attentions_for_hypernetwork
 from library.original_unet import UNet2DConditionModel
+from library.device_utils import clean_memory
 
 # Tokenizer: checkpointから読み込むのではなくあらかじめ提供されているものを使う
 TOKENIZER_PATH = "openai/clip-vit-large-patch14"
@@ -2267,8 +2267,7 @@ def cache_batch_latents(
                 info.latents_flipped = flipped_latent
 
     # FIXME this slows down caching a lot, specify this as an option
-    if torch.cuda.is_available():
-        torch.cuda.empty_cache()
+    clean_memory()
 
 
 def cache_batch_text_encoder_outputs(
@@ -3994,8 +3993,7 @@ def load_target_model(args, weight_dtype, accelerator, unet_use_linear_projectio
                 unet.to(accelerator.device)
                 vae.to(accelerator.device)
 
-            gc.collect()
-            torch.cuda.empty_cache()
+            clean_memory()
         accelerator.wait_for_everyone()
 
     return text_encoder, vae, unet, load_stable_diffusion_format
@@ -4804,7 +4802,7 @@ def sample_images_common(
 
     # clear pipeline and cache to reduce vram usage
     del pipeline
-    torch.cuda.empty_cache()
+    clean_memory()
 
     torch.set_rng_state(rng_state)
     if cuda_rng_state is not None:
diff --git a/library/utils.py b/library/utils.py
index 7d801a676..c96fcb144 100644
--- a/library/utils.py
+++ b/library/utils.py
@@ -1,6 +1,5 @@
 import threading
-from typing import *
 
 
 def fire_in_thread(f, *args, **kwargs):
-    threading.Thread(target=f, args=args, kwargs=kwargs).start()
\ No newline at end of file
+    threading.Thread(target=f, args=args, kwargs=kwargs).start()
diff --git a/requirements.txt b/requirements.txt
index 8517d95ac..65c22258f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,15 +3,15 @@ transformers==4.36.2
 diffusers[torch]==0.25.0
 ftfy==6.1.1
 # albumentations==1.3.0
-opencv-python==4.7.0.68
+opencv-python>=4.7.0.68
 einops==0.6.1
 pytorch-lightning==1.9.0
 # bitsandbytes==0.39.1
 tensorboard==2.10.1
-safetensors==0.3.1
+safetensors>=0.3.1
 # gradio==3.16.2
-altair==4.2.2
-easygui==0.98.3
+#altair==4.2.2
+#easygui==0.98.3
 toml==0.10.2
 voluptuous==0.13.1
 huggingface-hub==0.20.1
diff --git a/sdxl_gen_img.py b/sdxl_gen_img.py
index ab5399842..6b15a4a8c 100755
--- a/sdxl_gen_img.py
+++ b/sdxl_gen_img.py
@@ -18,6 +18,8 @@
 import numpy as np
 import torch
 
+from library.device_utils import clean_memory
+
 try:
     import intel_extension_for_pytorch as ipex
 
@@ -645,8 +647,7 @@ def __call__(
                     init_latent_dist = self.vae.encode(init_image.to(self.vae.dtype)).latent_dist
                     init_latents = init_latent_dist.sample(generator=generator)
                 else:
-                    if torch.cuda.is_available():
-                        torch.cuda.empty_cache()
+                    clean_memory()
                     init_latents = []
                     for i in tqdm(range(0, min(batch_size, len(init_image)), vae_batch_size)):
                         init_latent_dist = self.vae.encode(
@@ -785,8 +786,7 @@ def __call__(
         if vae_batch_size >= batch_size:
             image = self.vae.decode(latents.to(self.vae.dtype)).sample
         else:
-            if torch.cuda.is_available():
-                torch.cuda.empty_cache()
+            clean_memory()
             images = []
             for i in tqdm(range(0, batch_size, vae_batch_size)):
                 images.append(
@@ -801,8 +801,7 @@ def __call__(
         # we always cast to float32 as this does not cause significant overhead and is compatible with bfloa16
         image = image.cpu().permute(0, 2, 3, 1).float().numpy()
 
-        if torch.cuda.is_available():
-            torch.cuda.empty_cache()
+        clean_memory()
 
         if output_type == "pil":
             # image = self.numpy_to_pil(image)
diff --git a/sdxl_train.py b/sdxl_train.py
index b4ce2770e..817c15831 100644
--- a/sdxl_train.py
+++ b/sdxl_train.py
@@ -1,7 +1,6 @@
 # training with captions
 
 import argparse
-import gc
 import math
 import os
 from multiprocessing import Value
@@ -11,6 +10,8 @@
 from tqdm import tqdm
 import torch
 
+from library.device_utils import clean_memory
+
 try:
     import intel_extension_for_pytorch as ipex
 
@@ -257,9 +258,7 @@ def fn_recursive_set_mem_eff(module: torch.nn.Module):
         with torch.no_grad():
             train_dataset_group.cache_latents(vae, args.vae_batch_size, args.cache_latents_to_disk, accelerator.is_main_process)
         vae.to("cpu")
-        if torch.cuda.is_available():
-            torch.cuda.empty_cache()
-        gc.collect()
+        clean_memory()
 
         accelerator.wait_for_everyone()
 
@@ -412,8 +411,7 @@ def fn_recursive_set_mem_eff(module: torch.nn.Module):
         # move Text Encoders for sampling images. Text Encoder doesn't work on CPU with fp16
         text_encoder1.to("cpu", dtype=torch.float32)
         text_encoder2.to("cpu", dtype=torch.float32)
-        if torch.cuda.is_available():
-            torch.cuda.empty_cache()
+        clean_memory()
     else:
         # make sure Text Encoders are on GPU
         text_encoder1.to(accelerator.device)
diff --git a/sdxl_train_control_net_lllite.py b/sdxl_train_control_net_lllite.py
index 4436dd3cd..e86443a40 100644
--- a/sdxl_train_control_net_lllite.py
+++ b/sdxl_train_control_net_lllite.py
@@ -2,7 +2,6 @@
 # training code for ControlNet-LLLite with passing cond_image to U-Net's forward
 
 import argparse
-import gc
 import json
 import math
 import os
@@ -14,6 +13,9 @@
 
 from tqdm import tqdm
 import torch
+
+from library.device_utils import clean_memory
+
 try:
     import intel_extension_for_pytorch as ipex
     if torch.xpu.is_available():
@@ -166,9 +168,7 @@ def train(args):
                 accelerator.is_main_process,
             )
         vae.to("cpu")
-        if torch.cuda.is_available():
-            torch.cuda.empty_cache()
-        gc.collect()
+        clean_memory()
 
         accelerator.wait_for_everyone()
 
@@ -293,8 +293,7 @@ def train(args):
         # move Text Encoders for sampling images. Text Encoder doesn't work on CPU with fp16
         text_encoder1.to("cpu", dtype=torch.float32)
         text_encoder2.to("cpu", dtype=torch.float32)
-        if torch.cuda.is_available():
-            torch.cuda.empty_cache()
+        clean_memory()
     else:
         # make sure Text Encoders are on GPU
         text_encoder1.to(accelerator.device)
diff --git a/sdxl_train_control_net_lllite_old.py b/sdxl_train_control_net_lllite_old.py
index 6ae5377ba..4629a7378 100644
--- a/sdxl_train_control_net_lllite_old.py
+++ b/sdxl_train_control_net_lllite_old.py
@@ -1,5 +1,4 @@
 import argparse
-import gc
 import json
 import math
 import os
@@ -11,6 +10,9 @@
 
 from tqdm import tqdm
 import torch
+
+from library.device_utils import clean_memory
+
 try:
     import intel_extension_for_pytorch as ipex
     if torch.xpu.is_available():
@@ -165,9 +167,7 @@ def train(args):
                 accelerator.is_main_process,
             )
         vae.to("cpu")
-        if torch.cuda.is_available():
-            torch.cuda.empty_cache()
-        gc.collect()
+        clean_memory()
 
         accelerator.wait_for_everyone()
 
@@ -266,8 +266,7 @@ def train(args):
         # move Text Encoders for sampling images. Text Encoder doesn't work on CPU with fp16
         text_encoder1.to("cpu", dtype=torch.float32)
         text_encoder2.to("cpu", dtype=torch.float32)
-        if torch.cuda.is_available():
-            torch.cuda.empty_cache()
+        clean_memory()
     else:
         # make sure Text Encoders are on GPU
         text_encoder1.to(accelerator.device)
diff --git a/sdxl_train_network.py b/sdxl_train_network.py
index d810ce7d4..822c1e153 100644
--- a/sdxl_train_network.py
+++ b/sdxl_train_network.py
@@ -1,6 +1,8 @@
 import argparse
 import torch
 
+from library.device_utils import clean_memory
+
 try:
     import intel_extension_for_pytorch as ipex
 
@@ -70,8 +72,7 @@ def cache_text_encoder_outputs_if_needed(
                 org_unet_device = unet.device
                 vae.to("cpu")
                 unet.to("cpu")
-                if torch.cuda.is_available():
-                    torch.cuda.empty_cache()
+                clean_memory()
 
             # When TE is not be trained, it will not be prepared so we need to use explicit autocast
             with accelerator.autocast():
@@ -86,8 +87,7 @@ def cache_text_encoder_outputs_if_needed(
 
             text_encoders[0].to("cpu", dtype=torch.float32)  # Text Encoder doesn't work with fp16 on CPU
             text_encoders[1].to("cpu", dtype=torch.float32)
-            if torch.cuda.is_available():
-                torch.cuda.empty_cache()
+            clean_memory()
 
             if not args.lowram:
                 print("move vae and unet back to original device")
diff --git a/train_controlnet.py b/train_controlnet.py
index cc0eaab7a..89310116b 100644
--- a/train_controlnet.py
+++ b/train_controlnet.py
@@ -1,5 +1,4 @@
 import argparse
-import gc
 import json
 import math
 import os
@@ -12,6 +11,8 @@
 from tqdm import tqdm
 import torch
 
+from library.device_utils import clean_memory
+
 try:
     import intel_extension_for_pytorch as ipex
 
@@ -224,9 +225,7 @@ def train(args):
                 accelerator.is_main_process,
             )
         vae.to("cpu")
-        if torch.cuda.is_available():
-            torch.cuda.empty_cache()
-        gc.collect()
+        clean_memory()
 
         accelerator.wait_for_everyone()
 
diff --git a/train_db.py b/train_db.py
index 14d9dff13..cda321d54 100644
--- a/train_db.py
+++ b/train_db.py
@@ -1,7 +1,6 @@
 # DreamBooth training
 # XXX dropped option: fine_tune
 
-import gc
 import argparse
 import itertools
 import math
@@ -12,6 +11,8 @@
 from tqdm import tqdm
 import torch
 
+from library.device_utils import clean_memory
+
 try:
     import intel_extension_for_pytorch as ipex
 
@@ -143,9 +144,7 @@ def train(args):
         with torch.no_grad():
             train_dataset_group.cache_latents(vae, args.vae_batch_size, args.cache_latents_to_disk, accelerator.is_main_process)
         vae.to("cpu")
-        if torch.cuda.is_available():
-            torch.cuda.empty_cache()
-        gc.collect()
+        clean_memory()
 
         accelerator.wait_for_everyone()
 
diff --git a/train_network.py b/train_network.py
index c2b7fbdef..2aa23d0be 100644
--- a/train_network.py
+++ b/train_network.py
@@ -1,6 +1,5 @@
 import importlib
 import argparse
-import gc
 import math
 import os
 import sys
@@ -14,6 +13,8 @@
 import torch
 from torch.nn.parallel import DistributedDataParallel as DDP
 
+from library.device_utils import clean_memory
+
 try:
     import intel_extension_for_pytorch as ipex
 
@@ -271,9 +272,7 @@ def train(self, args):
             with torch.no_grad():
                 train_dataset_group.cache_latents(vae, args.vae_batch_size, args.cache_latents_to_disk, accelerator.is_main_process)
             vae.to("cpu")
-            if torch.cuda.is_available():
-                torch.cuda.empty_cache()
-            gc.collect()
+            clean_memory()
 
             accelerator.wait_for_everyone()
 
diff --git a/train_textual_inversion.py b/train_textual_inversion.py
index 0e3912b1d..954715269 100644
--- a/train_textual_inversion.py
+++ b/train_textual_inversion.py
@@ -1,5 +1,4 @@
 import argparse
-import gc
 import math
 import os
 from multiprocessing import Value
@@ -8,6 +7,8 @@
 from tqdm import tqdm
 import torch
 
+from library.device_utils import clean_memory
+
 try:
     import intel_extension_for_pytorch as ipex
 
@@ -368,9 +369,7 @@ def train(self, args):
             with torch.no_grad():
                 train_dataset_group.cache_latents(vae, args.vae_batch_size, args.cache_latents_to_disk, accelerator.is_main_process)
             vae.to("cpu")
-            if torch.cuda.is_available():
-                torch.cuda.empty_cache()
-            gc.collect()
+            clean_memory()
 
             accelerator.wait_for_everyone()
 
diff --git a/train_textual_inversion_XTI.py b/train_textual_inversion_XTI.py
index 71b43549d..0417ba02a 100644
--- a/train_textual_inversion_XTI.py
+++ b/train_textual_inversion_XTI.py
@@ -1,6 +1,5 @@
 import importlib
 import argparse
-import gc
 import math
 import os
 import toml
@@ -8,6 +7,9 @@
 
 from tqdm import tqdm
 import torch
+
+from library.device_utils import clean_memory
+
 try:
     import intel_extension_for_pytorch as ipex
     if torch.xpu.is_available():
@@ -288,9 +290,7 @@ def train(args):
         with torch.no_grad():
             train_dataset_group.cache_latents(vae, args.vae_batch_size, args.cache_latents_to_disk, accelerator.is_main_process)
         vae.to("cpu")
-        if torch.cuda.is_available():
-            torch.cuda.empty_cache()
-        gc.collect()
+        clean_memory()
 
         accelerator.wait_for_everyone()