Merge pull request #103 from SeanNaren/feat/deepspeed

Initial Lightning DeepSpeed Integration

aitextgen/aitextgen.py

@@ -1,3 +1,4 @@
+from pytorch_lightning.plugins import DeepSpeedPlugin
 from transformers import (
     GPT2LMHeadModel,
     GPT2TokenizerFast,
@@ -651,24 +652,21 @@ def train(
         if not is_gpu_used:
             n_gpu = 0
 
-        # use the deepseed plugin if installed and specified
+        # use the DeepSpeed plugin if installed and specified
         deepspeed_plugin = None
-        # if is_gpu_used and use_deepspeed:
-        #     deepspeed_config = gen_deepspeed_config(
-        #         self.get_device(), learning_rate, weight_decay
-        #     )
-        #     deepspeed_plugin = DeepSpeedPlugin(deepseed_config)
-        #     logger.info("Using DeepSpeed training.")
-        # logger.warning(
-        #     "deepspeed was attempted to be used, but was not installed. "
-        #     + "Using normal training behavior."
-        # )
+        if is_gpu_used and use_deepspeed:
+            deepspeed_plugin = DeepSpeedPlugin()
+            logger.info("Using DeepSpeed training.")
+            if not fp16:
+                logger.info("Setting FP16 to True for DeepSpeed ZeRO Training.")
+                fp16 = True
+
 
         train_params = dict(
             accumulate_grad_batches=gradient_accumulation_steps,
             gpus=n_gpu,
             max_steps=num_steps,
-            gradient_clip_val=max_grad_norm if not fp16 else 0,
+            gradient_clip_val=max_grad_norm,
             checkpoint_callback=False,
             logger=loggers if loggers else False,
             weights_summary=None,

aitextgen/utils.py

@@ -172,47 +172,3 @@ def skip_special_tokens(tensor, device, special_token_ids):
         ~tensor.unsqueeze(1).eq(special_token_id_tensor.unsqueeze(1)).any(1)
     ].tolist()
 
-
-def gen_deepspeed_config(device, lr, weight_decay):
-    """Deepspeed OneBitAdam config.
-
-    Adapted from https://pytorch-lightning.readthedocs.io/en/stable/advanced/multi_gpu.html#deepspeed
-
-    Args:
-        device ([type]): Device for training
-        lr ([type]): Learning rate
-        weight_decay ([type]): Weight decay
-    """
-
-    deepspeed_config = {
-        "zero_allow_untested_optimizer": True,
-        "optimizer": {
-            "type": "OneBitAdam",
-            "params": {
-                "lr": lr,
-                "betas": [0.998, 0.999],
-                "eps": 1e-5,
-                "weight_decay": weight_decay,
-                "cuda_aware": "cuda" in device,
-            },
-        },
-        "scheduler": {
-            "type": "WarmupLR",
-            "params": {
-                "last_batch_iteration": -1,
-                "warmup_min_lr": 0,
-                "warmup_max_lr": 3e-5,
-                "warmup_num_steps": 100,
-            },
-        },
-        "zero_optimization": {
-            "stage": 2,  # Enable Stage 2 ZeRO (Optimizer/Gradient state partitioning)
-            "cpu_offload": True,  # Enable Offloading optimizer state/calculation to the host CPU
-            "contiguous_gradients": True,  # Reduce gradient fragmentation.
-            "overlap_comm": True,  # Overlap reduce/backward operation of gradients for speed.
-            "allgather_bucket_size": 2e8,  # Number of elements to all gather at once.
-            "reduce_bucket_size": 2e8,  # Number of elements we reduce/allreduce at once.
-        },
-    }
-
-    return deepspeed_config

requirements.txt

@@ -1,4 +1,4 @@
 transformers>=4.3.0
 fire>=0.3.0
-pytorch-lightning>=1.2.0
+pytorch-lightning>=1.2.3
 torch>=1.6.0

setup.py

@@ -19,7 +19,7 @@
     install_requires=[
         "transformers>=4.3.0",
         "fire>=0.3.0",
-        "pytorch-lightning>=1.2.0",
+        "pytorch-lightning>=1.2.3",
         "torch>=1.6.0",
     ],
 )