Sync from v0.13

tests/models/quantization/test_bitblas.py

@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+"""Compare the outputs of a GPTQ model to a bitblas model.
+
+Note: GPTQ and bitblas do not have bitwise correctness.
+As a result, in this test, we just confirm that the top selected tokens of the
+bitblas/GPTQ models are in the top 3 selections of each other.
+
+Note: bitblas internally uses locks to synchronize the threads. This can
+result in very slight nondeterminism for bitblas. As a result, we re-run the
+test up to 3 times to see if we pass.
+"""
+
+from dataclasses import dataclass
+
+import pytest
+
+from ..utils import check_logprobs_close
+
+
+@dataclass
+class ModelPair:
+    model_bitblas: str
+    model_gptq: str
+
+
+model_pairs = [
+    ModelPair(
+        model_bitblas="hxbgsyxh/opt-125m-4bit-128g-bitblas",
+        model_gptq="hxbgsyxh/opt-125m-4bit-128g",
+    ),
+]
+
+
+@pytest.mark.flaky(reruns=2)
+@pytest.mark.skipif(True, reason="BitBLAS takes too much time for tuning.")
+@pytest.mark.parametrize("model_pair", model_pairs)
+@pytest.mark.parametrize("dtype", ["half"])
+@pytest.mark.parametrize("max_tokens", [32])
+@pytest.mark.parametrize("num_logprobs", [5])
+def test_models(
+    vllm_runner,
+    example_prompts,
+    model_pair: ModelPair,
+    dtype: str,
+    max_tokens: int,
+    num_logprobs: int,
+) -> None:
+    with vllm_runner(
+        model_pair.model_bitblas, dtype=dtype, quantization="bitblas"
+    ) as bitblas_model:
+        bitblas_outputs = bitblas_model.generate_greedy_logprobs(
+            example_prompts, max_tokens, num_logprobs
+        )
+
+    with vllm_runner(
+        model_pair.model_gptq, dtype=dtype, quantization="gptq"
+    ) as gptq_model:
+        gptq_outputs = gptq_model.generate_greedy_logprobs(
+            example_prompts, max_tokens, num_logprobs
+        )
+
+    check_logprobs_close(
+        outputs_0_lst=gptq_outputs,
+        outputs_1_lst=bitblas_outputs,
+        name_0="gptq",
+        name_1="bitblas",
+    )