Sync from v0.13

tests/quantization/test_ptpc_fp8.py

@@ -0,0 +1,70 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+"""Tests whether PTPC w8a8 FP8 computation is enabled correctly.
+
+Run `pytest tests/quantization/test_ptpc_fp8.py --forked`.
+"""
+
+import pytest
+import torch
+
+from tests.quantization.utils import is_quant_method_supported
+from vllm.model_executor.layers.quantization.fp8 import Fp8KVCacheMethod
+from vllm.model_executor.layers.quantization.ptpc_fp8 import PTPCFp8LinearMethod
+from vllm.platforms import current_platform
+
+UNSUPPORTED_STR = (
+    "Currently torch._scaled_mm (hipBLASLt) rowwise gemm only "
+    "support output dtype of bfloat16. torch.float16 is specified."
+)
+
+
+@pytest.fixture(scope="function", autouse=True)
+def enable_pickle(monkeypatch):
+    """`LLM.apply_model` requires pickling a function."""
+    monkeypatch.setenv("VLLM_ALLOW_INSECURE_SERIALIZATION", "1")
+
+
+@pytest.mark.skipif(
+    not is_quant_method_supported("ptpc_fp8"),
+    reason="PTPC FP8 is not supported on this GPU type.",
+)
+@pytest.mark.skipif(not current_platform.is_rocm(), reason="This test is for ROCm GPU.")
+@pytest.mark.parametrize("dtype", ["auto", "bfloat16", "float16"])
+@pytest.mark.parametrize("kv_cache_dtype", ["auto", "fp8", "fp8_e4m3"])
+def test_ptpc_fp8_rocm(vllm_runner, dtype: str, kv_cache_dtype: str) -> None:
+    try:
+        llm = vllm_runner(
+            "facebook/opt-125m",
+            dtype=dtype,
+            quantization="ptpc_fp8",
+            enforce_eager=True,
+            kv_cache_dtype=kv_cache_dtype,
+        )
+    except AssertionError as e:
+        if str(e) == UNSUPPORTED_STR:
+            # If the error message matches, the test passes
+            return
+        else:
+            # If the error message does not match, re-raise the exception
+            raise
+
+    with llm:
+
+        def check_model(model):
+            fc1 = model.model.decoder.layers[0].fc1
+            assert isinstance(fc1.quant_method, PTPCFp8LinearMethod)
+            if kv_cache_dtype == "ptpc_fp8":
+                attn = model.model.decoder.layers[0].self_attn.attn
+                assert isinstance(attn.quant_method, Fp8KVCacheMethod)
+                assert attn._k_scale == 1.0
+                assert attn._v_scale == 1.0
+
+            if current_platform.has_device_capability(94):
+                # For GPUs with hardware support, we keep weights in fp8
+                assert fc1.weight.dtype == torch.float8_e4m3fnuz
+
+        llm.apply_model(check_model)
+
+        output = llm.generate_greedy("Hello my name is", max_tokens=4)
+        assert output