test_weight_loading.py

# SPDX-License-Identifier: Apache-2.0
# SPDX-FileCopyrightText: Copyright contributors to the vLLM project

import os

import pytest
import torch

from vllm.platforms import current_platform

MAX_MODEL_LEN = 1024
MODEL_NAME = os.environ.get("MODEL_NAME",
                            "robertgshaw2/zephyr-7b-beta-channelwise-gptq")
REVISION = os.environ.get("REVISION", "main")
QUANTIZATION = os.environ.get("QUANTIZATION", "gptq_marlin")
MIN_CAPABILITY = os.environ.get("MIN_CAPABILITY", "80")


@pytest.mark.skipif(
    MODEL_NAME == "casperhansen/deepseek-coder-v2-instruct-awq",
    reason="OOM in the CI")
@pytest.mark.skipif(
    not current_platform.has_device_capability(int(MIN_CAPABILITY)),
    reason="Current system does not have minimum capability.")
def test_weight_loading(vllm_runner):
    """
    Test parameter weight loading with tp>1.
    """

    # MoE models need fp16.
    NEEDS_FP16 = (QUANTIZATION == "gptq" or MODEL_NAME
                  == "nm-testing/test-w4a16-mixtral-actorder-group")
    with vllm_runner(
            model_name=MODEL_NAME,
            revision=REVISION,
            dtype=torch.half if NEEDS_FP16 else "auto",
            quantization=None if QUANTIZATION == "None" else QUANTIZATION,
            max_model_len=MAX_MODEL_LEN,
            tensor_parallel_size=2) as model:

        output = model.generate_greedy("Hello world!", max_tokens=20)
        print(output)
        assert output