[Fix] Remaining Issues in #19 (#75)

* previous merged

* add chinese

* support torch<2

* add a docstring

* fix typo

* rename torch submodule

* rename to pytorch

* rename in readme

README.md

@@ -127,7 +127,7 @@ For the deployment of other supported models, such as LLaMA, vicuna, you can fin
 #### Single GPU
 
 ```shell
-python3 -m lmdeploy.torch.chat $NAME_OR_PATH_TO_HF_MODEL\
+python3 -m lmdeploy.pytorch.chat $NAME_OR_PATH_TO_HF_MODEL \
     --max_new_tokens 64 \
     --temperture 0.8 \
     --top_p 0.95 \
@@ -137,7 +137,7 @@ python3 -m lmdeploy.torch.chat $NAME_OR_PATH_TO_HF_MODEL\
 #### Tensor Parallel with DeepSpeed
 
 ```shell
-deepspeed --module --num_gpus 2 lmdeploy.torch.chat \
+deepspeed --module --num_gpus 2 lmdeploy.pytorch.chat \
     $NAME_OR_PATH_TO_HF_MODEL \
     --max_new_tokens 64 \
     --temperture 0.8 \

README_zh-CN.md

@@ -121,6 +121,29 @@ python3 lmdeploy.app {server_ip_addresss}:33337 internlm
 
 其他模型的部署方式，比如 LLaMA，vicuna，请参考[这里](docs/zh_cn/serving.md)
 
+### 基于 PyTorch 的推理
+
+#### 单个 GPU
+
+```shell
+python3 -m lmdeploy.pytorch.chat $NAME_OR_PATH_TO_HF_MODEL\
+    --max_new_tokens 64 \
+    --temperture 0.8 \
+    --top_p 0.95 \
+    --seed 0
+```
+
+#### 使用 DeepSpeed 实现张量并行
+
+```shell
+deepspeed --module --num_gpus 2 lmdeploy.pytorch.chat \
+    $NAME_OR_PATH_TO_HF_MODEL \
+    --max_new_tokens 64 \
+    --temperture 0.8 \
+    --top_p 0.95 \
+    --seed 0
+```
+
 ## 量化部署
 
 在 fp16 模式下，可以开启 kv_cache int8 量化，单卡可服务更多用户。

lmdeploy/torch/__init__.py → lmdeploy/pytorch/__init__.py

 # Copyright (c) OpenMMLab. All rights reserved.
+"""Chat with torch models."""

lmdeploy/pytorch/accel.py

+# Copyright (c) OpenMMLab. All rights reserved.
+import torch
+
+
+class LoadNoInit:
+    """Initialize model without parameter initialization."""
+
+    def __init__(self):
+        self.constant_ = torch.nn.init.constant_
+        self.zeros_ = torch.nn.init.zeros_
+        self.ones_ = torch.nn.init.ones_
+        self.uniform_ = torch.nn.init.uniform_
+        self.normal_ = torch.nn.init.normal_
+        self.kaiming_uniform_ = torch.nn.init.kaiming_uniform_
+        self.kaiming_normal_ = torch.nn.init.kaiming_normal_
+
+    def __enter__(self, *args, **kwargs):
+        torch.nn.init.constant_ = lambda *args, **kwargs: None
+        torch.nn.init.zeros_ = lambda *args, **kwargs: None
+        torch.nn.init.ones_ = lambda *args, **kwargs: None
+        torch.nn.init.uniform_ = lambda *args, **kwargs: None
+        torch.nn.init.normal_ = lambda *args, **kwargs: None
+        torch.nn.init.kaiming_uniform_ = lambda *args, **kwargs: None
+        torch.nn.init.kaiming_normal_ = lambda *args, **kwargs: None
+
+    def __exit__(self, *args, **kwargs):
+        torch.nn.init.constant_ = self.constant_
+        torch.nn.init.zeros_ = self.zeros_
+        torch.nn.init.ones_ = self.ones_
+        torch.nn.init.uniform_ = self.uniform_
+        torch.nn.init.normal_ = self.normal_
+        torch.nn.init.kaiming_uniform_ = self.kaiming_uniform_
+        torch.nn.init.kaiming_normal_ = self.kaiming_normal_

lmdeploy/torch/chat.py → lmdeploy/pytorch/chat.py

@@ -17,6 +17,7 @@ try:
     from transformers import (AutoModelForCausalLM, AutoTokenizer,
                               GenerationConfig)
 
+    from .accel import LoadNoInit
     from .utils import get_utils
 
     _is_transformers_available = True
@@ -51,10 +52,14 @@ def init_model(
                                               use_fast=use_fast_tokenizer,
                                               trust_remote_code=True)
 
-    torch.set_default_device(local_rank)
-    model = AutoModelForCausalLM.from_pretrained(model_path,
-                                                 torch_dtype=torch.float16,
-                                                 trust_remote_code=True)
+    if torch.__version__ >= '2':
+        torch.set_default_device(local_rank)
+
+    with LoadNoInit():
+        model = AutoModelForCausalLM.from_pretrained(model_path,
+                                                     torch_dtype=torch.float16,
+                                                     trust_remote_code=True)
+    model = model.cuda(local_rank)
 
     if not _is_deepspeed_available:
         warnings.warn('deepspeed is not installed, ',
@@ -69,8 +74,6 @@ def init_model(
             max_out_tokens=2048,
         )
 
-    # print(f"model is loaded on device {model.device}")
-
     return tokenizer, model
 
 
@@ -115,7 +118,7 @@ def main(
         temperature=temperature,
         top_p=top_p,
     )
-    model.generate(torch.tensor([[1]]), warmup_config)
+    model.generate(torch.tensor([[1]], device=local_rank), warmup_config)
 
     # print("READY ...")
     _on_master = local_rank == 0
@@ -154,7 +157,7 @@ def main(
 
             prompt = Decorator.decorate(prompt)
             ids = tokenizer.encode(prompt, return_tensors='pt')
-            model.generate(ids,
+            model.generate(ids.cuda(local_rank),
                            gen_config,
                            streamer=streamer,
                            stopping_criteria=stop_criteria)