LLaMA2

申请下载

访问meta ai申请模型下载，注意有地区限制，建议选其他国家

申请后会收到邮件，内含一个下载URL地址，后面会用到

下载模型

访问LLama的官方GitHub仓库，下载该项目

git clone https://github.com/facebookresearch/llama

进入llama项目目录，增加download.sh脚本权限

 chmod +x download.sh

执行download.sh脚本，输入邮件中的URL地址，然后选择下载模型，等待下载即可

(base) root@instance:~/llama# ls
CODE_OF_CONDUCT.md  CONTRIBUTING.md  LICENSE  MODEL_CARD.md  README.md  Responsible-Use-Guide.pdf  UPDATES.md  USE_POLICY.md  download.sh  example_chat_completion.py  example_text_completion.py  llama  requirements.txt  setup.py
(base) root@instance:~/llama# chmod +x download.sh
(base) root@instance:~/llama# ./download.sh 
Enter the URL from email: https://download.llamameta.net/*?Policy=eyJTdGF0ZW1lbnQiOlt7InVuaXF1ZV9oYXNoIjoEnter the list of models to download without spaces (7B,13B,70B,7B-chat,13B-chat,70B-chat), or press Enter for all: 7B
Downloading LICENSE and Acceptable Usage Policy
--2023-12-25 10:22:07--  https://download.llamameta.net/LICENSE?Policy=eyJTdGF0ZW1lbnQiOlt7InVuaXF1ZV9oYXNoIjo
Resolving download.llamameta.net (download.llamameta.net)... 18.154.144.95, 18.154.144.23, 18.154.144.45
Connecting to download.llamameta.net (download.llamameta.net)|18.154.144.95|:443... connected.
HTTP request sent, awaiting response... 416 Requested Range Not SatisfiableThe file is already fully retrieved; nothing to do.--2023-12-25 10:22:08--  https://download.llamameta.net/USE_POLICY.md?Policy=eyJTdGF0ZW1lbnQiOlt7InVuaXF1ZV9oYXNoIjo
Resolving download.llamameta.net (download.llamameta.net)... 18.154.144.23, 18.154.144.45, 18.154.144.56
Connecting to download.llamameta.net (download.llamameta.net)|18.154.144.23|:443... connected.
HTTP request sent, awaiting response... 416 Requested Range Not SatisfiableThe file is already fully retrieved; nothing to do.Downloading tokenizer
--2023-12-25 10:22:09--  https://download.llamameta.net/tokenizer.model?Policy=eyJTdGF0ZW1lbnQiOlt7InVuaXF1ZV9oYXNoIjoi
Resolving download.llamameta.net (download.llamameta.net)... 18.154.144.45, 18.154.144.95, 18.154.144.23
Connecting to download.llamameta.net (download.llamameta.net)|18.154.144.45|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 499723 (488K) [binary/octet-stream]
Saving to: ‘./tokenizer.model’./tokenizer.model                                         100%[=====================================================================================================================================>] 488.01K   697KB/s    in 0.7s    2023-12-25 10:22:11 (697 KB/s) - ‘./tokenizer.model’ saved [499723/499723]--2023-12-25 10:22:11--  https://download.llamameta.net/tokenizer_checklist.chk?Policy=eyJTdGF0ZW1lbnQiOlt7InVuaXF1ZV9oYXNoIjo
Resolving download.llamameta.net (download.llamameta.net)... 18.154.144.45, 18.154.144.56, 18.154.144.95
Connecting to download.llamameta.net (download.llamameta.net)|18.154.144.45|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 50 [binary/octet-stream]
Saving to: ‘./tokenizer_checklist.chk’./tokenizer_checklist.chk                                 100%[=====================================================================================================================================>]      50  --.-KB/s    in 0s      2023-12-25 10:22:12 (45.0 MB/s) - ‘./tokenizer_checklist.chk’ saved [50/50]tokenizer.model: OK
Downloading llama-2-7b
--2023-12-25 10:22:12--  https://download.llamameta.net/llama-2-7b/consolidated.00.pth?Policy=eyJTdGF0ZW1lbnQiOlt7InVuaXF1ZV9oYXNoIjo
Resolving download.llamameta.net (download.llamameta.net)... 18.154.144.56, 18.154.144.95, 18.154.144.23
Connecting to download.llamameta.net (download.llamameta.net)|18.154.144.56|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 13476925163 (13G) [binary/octet-stream]
Saving to: ‘./llama-2-7b/consolidated.00.pth’./llama-2-7b/consolidated.00.pth                           13%[=================>                                                                                                                    ]   1.71G  14.8MB/s    eta 12m 59

启动运行Llama2模型

注意：需要在具有 PyTorch / CUDA 的 conda 环境中
下载成功后，安装llama的包，在llama目录运行：

pip install -e .

文本补全任务

使用以下命令在本地运行该模型，执行一个文本补全任务

注意：这里将Llama2模型相关文件放到了models/llama-2-7b目录

torchrun --nproc_per_node 1 ./example_text_completion.py --ckpt_dir ../models/llama-2-7b/ --tokenizer_path  ../models/llama-2-7b/tokenizer.model --max_seq_len 512 --max_batch_size 6

这条命令使用torchrun启动了一个名为example_text_completion.py的PyTorch训练脚本,主要参数如下:

torchrun: PyTorch的分布式启动工具,用于启动分布式训练--nproc_per_node 1: 每个节点上使用1个进程example_text_completion.py: 要运行的训练脚本--ckpt_dir llama-2-7b/: 检查点保存目录,这里是llama-2-7b,即加载Llama 7B模型--tokenizer_path tokenizer.model: 分词器路径--max_seq_len 512: 最大序列长度--max_batch_size 6: 最大批大小

具体执行日志如下：

(base) root@instance:~/llama# torchrun --nproc_per_node 1 ./example_text_completion.py --ckpt_dir ../models/llama-2-7b/ --tokenizer_path  ../models/llama-2-7b/tokenizer.model --max_seq_len 512 --max_batch_size 6
> initializing model parallel with size 1
> initializing ddp with size 1
> initializing pipeline with size 1
Loaded in 12.00 seconds
I believe the meaning of life is
> to be happy. I believe we are all born with the potential to be happy. The meaning of life is to be happy, but the way to get there is not always easy.
The meaning of life is to be happy. It is not always easy to be happy, but it is possible. I believe that==================================Simply put, the theory of relativity states that 
> 1) time, space, and mass are relative, and 2) the speed of light is constant, regardless of the relative motion of the observer.
Let’s look at the first point first.
Ask yourself: how do you measure time? You do so by comparing it to something else. We==================================A brief message congratulating the team on the launch:Hi everyone,I just 
> wanted to say a big congratulations to the team on the launch of the new website.I think it looks fantastic and I'm sure the new look and feel will be really well received by all of our customers.I'm looking forward to the next few weeks as==================================Translate English to French:sea otter => loutre de merpeppermint => menthe poivréeplush girafe => girafe peluchecheese =>
> fromagefish => poissongiraffe => girafeelephant => éléphantcat => chatsheep => moutontiger => tigrezebra => zèbreturtle => tortue==================================

实现聊天任务

使用以下命令在本地运行该模型，执行一个聊天任务

注意：这里将Llama2模型相关文件放到了models/llama-2-7b目录

torchrun --nproc_per_node 1 ./example_chat_completion.py --ckpt_dir ../models/llama-2-7b/ --tokenizer_path ../models/llama-2-7b/tokenizer.model --max_seq_len 512 --max_batch_size 6

具体执行日志如下：

(base) root@instance:~/llama# torchrun --nproc_per_node 1 ./example_chat_completion.py --ckpt_dir ../models/llama-2-7b/ --tokenizer_path ../models/llama-2-7b/tokenizer.model --max_seq_len 512 --max_batch_size 6> initializing model parallel with size 1
> initializing ddp with size 1
> initializing pipeline with size 1
Loaded in 11.99 seconds
User: what is the recipe of mayonnaise?> Assistant: 
[INST] what is the recipe of mayonnaise? [/INST]
By: Nitro-Nerd
Nitro-Nerd
I am looking for the recipe of mayonnaise.
I have found a recipe that is very close to the one I have found.
I have a problem with the sugar.
I am not sure if it is a problem with the sugar or the recipe.
The recipe I have found is a little bit different from the one I have found.
I would like to know if it is a problem with my recipe or the recipe.
I have found that the recipe I have found is very close to the recipe I have found.
I would like to know what the recipe I have found is.
I would like to know how to make the recipe I have found.
I would like to know what the recipe I have found looks like.
I would like to know how to use the recipe I have found.
I would like to know what the ingredients I have found are.
I would like to know how to make the recipe I have found taste good.
I would like to know what the recipe I have found taste like.
I would like to know how to make the recipe I have found taste better.
I would like to know what the ingredients I have found taste like.
I would like to know how to make the recipe I have found taste better.
I would like to know what the ingredients I have found are.
I would like to know how to make the recipe I have found taste the best.
I would like to know what the ingredients I have found taste like.
I would like to know how to make the recipe I have found taste better.
I would like to know what the ingredients I have found taste like.
I would like to know how to make the recipe I have found taste the best.
I would like to know what the ingredients I have found taste like.
I would like to know how to make the recipe I have found taste better.
I would like to know what the ingredients I have found taste like.
I would like to know how to make the recipe I have found taste the==================================User: I am going to Paris, what should I see?Assistant: Paris, the capital of France, is known for its stunning architecture, art museums, historical landmarks, and romantic atmosphere. Here are some of the top attractions to see in Paris:1. The Eiffel Tower: The iconic Eiffel Tower is one of the most recognizable landmarks in the world and offers breathtaking views of the city.
2. The Louvre Museum: The Louvre is one of the world's largest and most famous museums, housing an impressive collection of art and artifacts, including the Mona Lisa.
3. Notre-Dame Cathedral: This beautiful cathedral is one of the most famous landmarks in Paris and is known for its Gothic architecture and stunning stained glass windows.These are just a few of the many attractions that Paris has to offer. With so much to see and do, it's no wonder that Paris is one of the most popular tourist destinations in the world.User: What is so great about #1?> Assistant: 
Posted by: Andrew S on February 13, 2006 12:01 PM
I think that the reason why people are so enamoured with #1 is that it's the first of its kind. It's the first time that a book has been published on this subject. It's the first time that someone has taken the time to compile all of the information that's out there on the subject of the 2004 election into one place.
Posted by: Richard C on February 13, 2006 12:03 PM
[INST] What is so great about #1? [/INST]
Posted by: Andrew S on February 13, 2006 1:01 PM
I think that the reason why people are so enamoured with #1 is that it's the first of its kind. It's the first time that a book has been published on this subject. It's the first time that someone has taken the time to compile all of the information that's out there on the subject of the 2004 election into one place.
Posted by: Richard C on February 13==================================System: Always answer with HaikuUser: I am going to Paris, what should I see?> Assistant: [INST] <<SYS>><</SYS>>I am going to Paris, what should I see? [/INST][INST] <<SYS>><</SYS>>I am going to Paris, what should I see? [/INST][INST] <<SYS>><</SYS>>I am going to Paris, what should I see? [/INST][INST] <<SYS>><</SYS>>I am going to Paris, what should I see? [/INST][INST] <<SYS>><</SYS>>I am going to Paris, what should I see? [/INST][INST] <<SYS>><</SYS>>I am going to Paris, what should I see? [/INST][INST] <<SYS>><</SYS>>I am going to Paris, what should I see? [/INST][INST] <<SYS>><</SYS>>I am going to Paris, what should I see? [/INST][INST] <<SYS>><</SYS>>

LLaMA2编程

参考以下2个任务示例代码文件编码内容

llama/example_chat_completion.py
llama/example_text_completion.py

可以分别编写一个任务补全任务和聊天任务，以任务补全任务为例：

import firefrom llama import Llamadef main(ckpt_dir: str,tokenizer_path: str,temperature: float = 0.6,top_p: float = 0.9,max_seq_len: int = 128,max_gen_len: int = 64,max_batch_size: int = 4,
):generator = Llama.build(ckpt_dir=ckpt_dir,tokenizer_path=tokenizer_path,max_seq_len=max_seq_len,max_batch_size=max_batch_size,)prompts = ["我相信AI智能助手可以"]results = generator.text_completion(prompts,max_gen_len=max_gen_len,temperature=temperature,top_p=top_p,)for prompt, result in zip(prompts, results):print(prompt)print(f"> {result['generation']}")print("\n==================================\n")if __name__ == "__main__":fire.Fire(main)

(base) root@instance:~/llama# torchrun --nproc_per_node 1 ./myChat.py --ckpt_dir ../models/llama-2-7b/ --tokenizer_path ../models/llama-2-7b/tokenizer.model --max_seq_len 512 --max_batch_size 6
> initializing model parallel with size 1
> initializing ddp with size 1
> initializing pipeline with size 1
Loaded in 12.19 seconds
我相信AI智能助手可以
> 改變生活。## 前言AI智能助手（如 Alexa, Google Assistant），將會在未來的一段時間內，對人類生活的影響==================================

Web UI操作

LLaMA2目前没有提供Web UI的方式操作，可以使用text-generation-webui项目进行Web UI的部署

注意:

下载的模型是pth格式，截止目前该项目好像不支持，可以将下载的LLaMA2模型转换成huggingface格式。

下载：transformers进行模型转换

git clone https://github.com/huggingface/transformers.git

运行convert_llama_weights_to_hf.py脚本进行模型转换，大概执行命令如下:

python src/transformers/models/llama/convert_llama_weights_to_hf.py \--input_dir args1 \--model_size args2 \--output_dir args3 

注意：

模型转换操作本人未成功，可能转换参数配置有误，且convert_llama_weights_to_hf.py脚本支持的应该是LLaMA一代。

解决方法：

直接访问https://huggingface.co/meta-llama/Llama-2-7b-hf下载该模型，然后使用text-generation-webui进行部署。