Unable to support the qwen model well

[sonica1987]

I tried qwen 0.5b, 1.8b, 4b, and 7b, and only 0.5b worked properly. However, the result was not as good as the official demo. The output included the label "<| im_start |>" in the prompt, which I believe will affect the final inference result. I hope to improve it to better support the qwen series model. Thank you

[sonica1987]

This may be due to the model I downloaded from HF using an old version of llama.cpp conversion, which seems to have been fixed in the new version

ggerganov/llama.cpp#4331

[guinmoon]

Can you tell me if reconverting solved your problem?

[sonica1987]

Can you tell me if reconverting solved your problem?

Hello, I have re exported the gguf model using llama.cpp and the issue has not been resolved. Here is the prompt template I tried:

<|im_start|>system
{{You are a helpful assistant.}}<|im_end|>
<|im_start|>user
{{prompt}}<|im_end|>
<|im_start|>assistant

The following is the interaction mode of llama.cpp, using：
./main -m ./models/gguf/qwen_0.5b_chat-Q4_K_M.gguf -n 128 -i --chatml

== Running in interactive mode. ==

• Press Ctrl+C to interject at any time.
• Press Return to return control to LLaMa.
• To return control without starting a new line, end your input with '/'.
• If you want to submit another line, end your input with ''.

<|endoftext|><|im_start|>system
<|im_end|>
<|im_start|>user

Hello
Hello! How can I assist you today?<|im_end|>

你好
你好！有什么我可以帮助您的吗？<|im_end|>

提取
您好！我需要帮助提取什么信息？<|im_end|>

晚安
晚安，愿您有一个美好的夜晚！<|im_end|>

返回
好的，我将返回您的信息。<|im_end|>

in llama.cpp The converted model works very well

[guinmoon]

try this template

[system](<|im_start|>system
You are a helpful assistant.<|im_end|>)
<|im_start|>user
{{prompt}}<|im_end|>
<|im_start|>assistant

[sonica1987]

try this template

[system](<|im_start|>system
You are a helpful assistant.<|im_end|>)
<|im_start|>user
{{prompt}}<|im_end|>
<|im_start|>assistant

same problem Not working
When<| im_start |>is not used in the template, the inference result will still have<| im_start |>

It is easy to reproduce the problem when using irregular short prompt for questioning

[guinmoon]

I think it's all in the --chatml key. In ./main llama.cpp there is a special check for such tokens as <|im_start|> when specifying the --chatml key. Apparently, the template does not cure it. I will try to add a similar option in the new version of llmfarm.

[guinmoon]

It looks like the <|im_start|> token does not appear with this prompt format. Try this. The first and last lines are empty.

<|im_start|>user
{{prompt}}<|im_end|>

<|im_start|>assistant

[sonica1987]

看起来<|im_start|>令牌没有以这种提示格式出现。试试这个。第一行和最后一行是空的。

<|im_start|>user
{{prompt}}<|im_end|>

<|im_start|>assistant

I am using the app in testlight for testing, but there is still an issue. I am currently unable to compile this project, and I apologize for not being able to assist

[guinmoon]

also try add <|im_start|> to reverse prompt

[sonica1987]

<|im_start|>

☹️

[yangtuo250]

Qwen1.5.json