[example] Change some training settings for diffusion (#2195)

examples/images/diffusion/README.md

@@ -87,14 +87,15 @@ you should the change the `data.file_path` in the `config/train_colossalai.yaml`
 
 ## Training
 
-We provide the script `train.sh` to run the training task , and two Stategy in `configs`:`train_colossalai.yaml` and `train_ddp.yaml`
+We provide the script `train_colossalai.sh` to run the training task with colossalai,
+and can also use `train_ddp.sh` to run the training task with ddp to compare.
 
-For example, you can run the training from colossalai by
+In `train_colossalai.sh` the main command is:
 ```
 python main.py --logdir /tmp/ -t -b configs/train_colossalai.yaml
 ```
 
-- you can change the `--logdir` the save the log information and the last checkpoint
+- you can change the `--logdir` to decide where to save the log information and the last checkpoint.
 
 ### Training config
 
@@ -155,6 +156,7 @@ optional arguments:
   --config CONFIG       path to config which constructs model
   --ckpt CKPT           path to checkpoint of model
   --seed SEED           the seed (for reproducible sampling)
+  --use_int8            whether to use quantization method
   --precision {full,autocast}
                         evaluate at this precision
 ```

examples/images/diffusion/configs/train_colossalai.yaml

@@ -80,19 +80,22 @@ model:
 data:
   target: main.DataModuleFromConfig
   params:
-    batch_size: 64
+    batch_size: 128
     wrap: False
+    # num_workwers should be 2 * batch_size, and total num less than 1024
+    # e.g. if use 8 devices, no more than 128
+    num_workers: 128
     train:
       target: ldm.data.base.Txt2ImgIterableBaseDataset
       params:
-        file_path: "/data/scratch/diffuser/laion_part0/"
+        file_path: # YOUR DATASET_PATH
         world_size: 1
         rank: 0
 
 lightning:
   trainer:
     accelerator: 'gpu'
-    devices: 4
+    devices: 8
     log_gpu_memory: all
     max_epochs: 2
     precision: 16

examples/images/diffusion/configs/train_ddp.yaml

@@ -80,25 +80,21 @@ model:
 data:
   target: main.DataModuleFromConfig
   params:
-    batch_size: 16
-    num_workers: 4
+    batch_size: 128
+    # num_workwers should be 2 * batch_size, and the total num less than 1024
+    # e.g. if use 8 devices, no more than 128
+    num_workers: 128
     train:
-      target: ldm.data.teyvat.hf_dataset
+      target: ldm.data.base.Txt2ImgIterableBaseDataset
       params:
-        path: Fazzie/Teyvat
-        image_transforms:
-        - target: torchvision.transforms.Resize
-          params:
-            size: 512
-        - target: torchvision.transforms.RandomCrop
-          params:
-            size: 512
-        - target: torchvision.transforms.RandomHorizontalFlip
+        file_path: # YOUR DATAPATH
+        world_size: 1
+        rank: 0
 
 lightning:
   trainer:
     accelerator: 'gpu' 
-    devices: 2
+    devices: 8
     log_gpu_memory: all
     max_epochs: 2
     precision: 16

examples/images/diffusion/train.sh

-# HF_DATASETS_OFFLINE=1
-# TRANSFORMERS_OFFLINE=1
-# DIFFUSERS_OFFLINE=1
-
-python main.py --logdir /tmp/ -t -b configs/Teyvat/train_colossalai_teyvat.yaml

examples/images/diffusion/train_colossalai.sh

+HF_DATASETS_OFFLINE=1 
+TRANSFORMERS_OFFLINE=1 
+DIFFUSERS_OFFLINE=1 
+
+python main.py --logdir /tmp  -t -b /configs/train_colossalai.yaml

examples/images/diffusion/train_ddp.sh

+HF_DATASETS_OFFLINE=1 
+TRANSFORMERS_OFFLINE=1 
+DIFFUSERS_OFFLINE=1 
+
+python main.py --logdir /tmp  -t -b /configs/train_ddp.yaml