Testing LLM serving accuracy

This guide shows how to access to LLM model over serving endpoint.

The lm-evaluation-harness framework provides a convenient method of evaluating the quality of the model exposed over OpenAI API. It reports end to end quality of served model from the client application point of view.

Preparing the lm-evaluation-harness framework

Install the framework via pip:

pip3 install --extra-index-url "https://download.pytorch.org/whl/cpu" lm_eval[api] langdetect immutabledict

Exporting the models

git clone https://github.com/openvinotoolkit/model_server.git
cd model_server
pip3 install -U -r demos/common/export_models/requirements.txt
mkdir models 
python demos/common/export_models/export_model.py text_generation --source_model meta-llama/Meta-Llama-3-8B-Instruct --weight-format fp16 --kv_cache_precision u8 --config_file_path models/config.json --model_repository_path models
python demos/common/export_models/export_model.py text_generation --source_model meta-llama/Meta-Llama-3-8B --weight-format fp16 --kv_cache_precision u8 --config_file_path models/config.json --model_repository_path models

Starting the model server

With Docker

docker run -d --rm -p 8000:8000 -v $(pwd)/models:/workspace:ro openvino/model_server:latest --rest_port 8000 --config_path /workspace/config.json

On Baremetal

ovms --rest_port 8000 --config_path ./models/config.json

Running the tests

lm-eval --model local-chat-completions --tasks gsm8k --model_args model=meta-llama/Meta-Llama-3-8B-Instruct,base_url=http://localhost:8000/v3/chat/completions,num_concurrent=1,max_retries=3,tokenized_requests=False --verbosity DEBUG  --log_samples --output_path test/ --seed 1 --apply_chat_template --limit 100

local-chat-completions (model=meta-llama/Meta-Llama-3-8B-Instruct,base_url=http://localhost:8000/v3/chat/completions,num_concurrent=10,max_retries=3,tokenized_requests=False), gen_kwargs: (None), limit: 100.0, num_fewshot: None, batch_size: 1
|Tasks|Version|     Filter     |n-shot|  Metric   |   |Value|   |Stderr|
|-----|------:|----------------|-----:|-----------|---|----:|---|-----:|
|gsm8k|      3|flexible-extract|     5|exact_match|↑  | 0.62|±  |0.0488|
|     |       |strict-match    |     5|exact_match|↑  | 0.17|±  |0.0378|

While testing the non chat model and completion endpoint, the command would look like this:

lm-eval --model local-completions --tasks gsm8k --model_args model=meta-llama/Meta-Llama-3-8B,base_url=http://localhost:8000/v3/completions,num_concurrent=1,max_retries=3,tokenized_requests=False --verbosity DEBUG  --log_samples --output_path results/ --seed 1 --limit 100

local-completions (model=meta-llama/Meta-Llama-3-8B,base_url=http://localhost:8000/v3/completions,num_concurrent=10,max_retries=3,tokenized_requests=False), gen_kwargs: (None), limit: 100.0, num_fewshot: None, batch_size: 1
|Tasks|Version|     Filter     |n-shot|  Metric   |   |Value|   |Stderr|
|-----|------:|----------------|-----:|-----------|---|----:|---|-----:|
|gsm8k|      3|flexible-extract|     5|exact_match|↑  | 0.43|±  |0.0498|
|     |       |strict-match    |     5|exact_match|↑  | 0.43|±  |0.0498|

Other examples are below:

lm-eval --model local-chat-completions --tasks leaderboard_ifeval --model_args model=meta-llama/Meta-Llama-3-8B-Instruct,base_url=http://localhost:8000/v3/chat/completions,num_concurrent=10,max_retries=3,tokenized_requests=False --verbosity DEBUG --log_samples --output_path test/ --seed 1 --limit 100 --apply_chat_template  

lm-eval --model local-completions --tasks wikitext --model_args model=meta-llama/Meta-Llama-3-8B,base_url=http://localhost:8000/v3/completions,num_concurrent=10,max_retries=3,tokenized_requests=False --verbosity DEBUG --log_samples --output_path test/ --seed 1 --limit 100

Note The same procedure can be used to validate vLLM component. The only needed change would be updating base_url including replacing /v3/ with /v1/.