[CI] Enable test_initialization to run on V1

.buildkite/test-pipeline.yaml

@@ -472,10 +472,7 @@ steps:
     - pytest -v -s models/test_registry.py
     - pytest -v -s models/test_utils.py
     - pytest -v -s models/test_vision.py
-    # V1 Test: https://github.com/vllm-project/vllm/issues/14531
-    - VLLM_USE_V1=0 pytest -v -s models/test_initialization.py -k 'not llama4 and not plamo2'
-    - VLLM_USE_V1=0 pytest -v -s models/test_initialization.py -k 'llama4'
-    - VLLM_USE_V1=0 pytest -v -s models/test_initialization.py -k 'plamo2'
+    - pytest -v -s models/test_initialization.py
 
 - label: Language Models Test (Standard)
   mirror_hardwares: [amdexperimental]

tests/models/registry.py

@@ -55,9 +55,18 @@ class _HfExamplesInfo:
     trust_remote_code: bool = False
     """The ``trust_remote_code`` level required to load the model."""
 
+    v0_only: bool = False
+    """The model is only available with the vLLM V0 engine."""
+
     hf_overrides: dict[str, Any] = field(default_factory=dict)
     """The ``hf_overrides`` required to load the model."""
 
+    max_model_len: Optional[int] = None
+    """
+    The maximum model length to use for this model. Some models default to a
+    length that is too large to fit into memory in CI.
+    """
+
     def check_transformers_version(
         self,
         *,
@@ -215,10 +224,11 @@ def check_available_online(
     "OrionForCausalLM": _HfExamplesInfo("OrionStarAI/Orion-14B-Chat",
                                         trust_remote_code=True),
     "PersimmonForCausalLM": _HfExamplesInfo("adept/persimmon-8b-chat"),
-    "PhiForCausalLM": _HfExamplesInfo("microsoft/phi-2"),
+    "PhiForCausalLM": _HfExamplesInfo("microsoft/phi-2", v0_only=True),
     "Phi3ForCausalLM": _HfExamplesInfo("microsoft/Phi-3-mini-4k-instruct"),
     "Phi3SmallForCausalLM": _HfExamplesInfo("microsoft/Phi-3-small-8k-instruct",
-                                            trust_remote_code=True),
+                                            trust_remote_code=True,
+                                            v0_only=True),
     "PhiMoEForCausalLM": _HfExamplesInfo("microsoft/Phi-3.5-MoE-instruct",
                                          trust_remote_code=True),
     "Plamo2ForCausalLM": _HfExamplesInfo("pfnet/plamo-2-1b",
@@ -234,7 +244,8 @@ def check_available_online(
                                      is_available_online=False),
     "StableLMEpochForCausalLM": _HfExamplesInfo("stabilityai/stablelm-zephyr-3b",  # noqa: E501
                                                 is_available_online=False),
-    "StableLmForCausalLM": _HfExamplesInfo("stabilityai/stablelm-3b-4e1t"),
+    "StableLmForCausalLM": _HfExamplesInfo("stabilityai/stablelm-3b-4e1t",
+                                           v0_only=True),
     "Starcoder2ForCausalLM": _HfExamplesInfo("bigcode/starcoder2-3b"),
     "SolarForCausalLM": _HfExamplesInfo("upstage/solar-pro-preview-instruct"),
     "TeleChat2ForCausalLM": _HfExamplesInfo("Tele-AI/TeleChat2-3B",
@@ -303,7 +314,8 @@ def check_available_online(
     "AriaForConditionalGeneration": _HfExamplesInfo("rhymes-ai/Aria"),
     "AyaVisionForConditionalGeneration": _HfExamplesInfo("CohereForAI/aya-vision-8b"), # noqa: E501
     "Blip2ForConditionalGeneration": _HfExamplesInfo("Salesforce/blip2-opt-2.7b",  # noqa: E501
-                                                     extras={"6b": "Salesforce/blip2-opt-6.7b"}),  # noqa: E501
+                                                     extras={"6b": "Salesforce/blip2-opt-6.7b"},  # noqa: E501
+                                                     v0_only=True),
     "ChameleonForConditionalGeneration": _HfExamplesInfo("facebook/chameleon-7b"),  # noqa: E501
     "DeepseekVLV2ForCausalLM": _HfExamplesInfo("deepseek-ai/deepseek-vl2-tiny",  # noqa: E501
                                                 extras={"fork": "Isotr0py/deepseek-vl2-tiny"},  # noqa: E501
@@ -328,9 +340,11 @@ def check_available_online(
                                                         {"tiny": "HuggingFaceTB/SmolVLM-256M-Instruct"}),  # noqa: E501
     "KimiVLForConditionalGeneration": _HfExamplesInfo("moonshotai/Kimi-VL-A3B-Instruct",  # noqa: E501
                                                       extras={"thinking": "moonshotai/Kimi-VL-A3B-Thinking"},  # noqa: E501
-                                                      trust_remote_code=True),
+                                                      trust_remote_code=True,
+                                                      v0_only=True),
     "Llama4ForConditionalGeneration": _HfExamplesInfo("meta-llama/Llama-4-Scout-17B-16E-Instruct",   # noqa: E501
-                                                      min_transformers_version="4.51"),
+                                                      min_transformers_version="4.51",
+                                                      max_model_len=10240),
     "LlavaForConditionalGeneration": _HfExamplesInfo("llava-hf/llava-1.5-7b-hf",
                                                      extras={"mistral": "mistral-community/pixtral-12b", # noqa: E501
                                                              "mistral-fp8": "nm-testing/pixtral-12b-FP8-dynamic"}),  # noqa: E501
@@ -349,7 +363,8 @@ def check_available_online(
                                 extras={"2.6": "openbmb/MiniCPM-V-2_6"},  # noqa: E501
                                 trust_remote_code=True),
     "MiniMaxVL01ForConditionalGeneration": _HfExamplesInfo("MiniMaxAI/MiniMax-VL-01", # noqa: E501
-                                              trust_remote_code=True),
+                                              trust_remote_code=True,
+                                              v0_only=True),
     "Mistral3ForConditionalGeneration": _HfExamplesInfo("mistralai/Mistral-Small-3.1-24B-Instruct-2503",  # noqa: E501
                                                         extras={"fp8": "nm-testing/Mistral-Small-3.1-24B-Instruct-2503-FP8-dynamic"}),  # noqa: E501
     "MolmoForCausalLM": _HfExamplesInfo("allenai/Molmo-7B-D-0924",
@@ -372,7 +387,8 @@ def check_available_online(
     "Phi4MMForCausalLM": _HfExamplesInfo("microsoft/Phi-4-multimodal-instruct",
                                         trust_remote_code=True),
     "PixtralForConditionalGeneration": _HfExamplesInfo("mistralai/Pixtral-12B-2409",  # noqa: E501
-                                                       tokenizer_mode="mistral"),
+                                                       tokenizer_mode="mistral",
+                                                       v0_only=True),
     "QwenVLForConditionalGeneration": _HfExamplesInfo("Qwen/Qwen-VL",
                                                       extras={"chat": "Qwen/Qwen-VL-Chat"},  # noqa: E501
                                                       trust_remote_code=True,

tests/models/test_initialization.py

@@ -15,12 +15,12 @@
 
 
 @pytest.mark.parametrize("model_arch", HF_EXAMPLE_MODELS.get_supported_archs())
-def test_can_initialize(model_arch):
+def test_can_initialize(model_arch: str, monkeypatch: pytest.MonkeyPatch):
     model_info = HF_EXAMPLE_MODELS.get_hf_info(model_arch)
     model_info.check_available_online(on_fail="skip")
     model_info.check_transformers_version(on_fail="skip")
 
-    # Avoid OOM
+    # Avoid OOM and reduce initialization time by only using 1 layer
     def hf_overrides(hf_config: PretrainedConfig) -> PretrainedConfig:
         hf_config.update(model_info.hf_overrides)
 
@@ -34,6 +34,12 @@ def hf_overrides(hf_config: PretrainedConfig) -> PretrainedConfig:
             "num_local_experts": 2,
         })
 
+        if hasattr(hf_config, "vision_config"):
+            hf_config.vision_config.update({
+                "num_layers": 1,
+                "num_hidden_layers": 1,
+            })
+
         return hf_config
 
     # Avoid calling model.forward()
@@ -46,7 +52,7 @@ def _initialize_kv_caches_v1(self, vllm_config):
         scheduler_kv_cache_config = get_kv_cache_config(
             vllm_config,
             kv_cache_specs[0],
-            20 * GiB_bytes,
+            10 * GiB_bytes,
         )
 
         # gpu_blocks (> 0), cpu_blocks, scheduler_kv_cache_config
@@ -55,7 +61,9 @@ def _initialize_kv_caches_v1(self, vllm_config):
     with (patch.object(V0LLMEngine, "_initialize_kv_caches",
                        _initialize_kv_caches_v0),
           patch.object(V1EngineCore, "_initialize_kv_caches",
-                       _initialize_kv_caches_v1)):
+                       _initialize_kv_caches_v1), monkeypatch.context() as m):
+        if model_info.v0_only:
+            m.setenv("VLLM_USE_V1", "0")
         LLM(
             model_info.default,
             tokenizer=model_info.tokenizer,
@@ -65,6 +73,7 @@ def _initialize_kv_caches_v1(self, vllm_config):
                 "num_speculative_tokens": 1,
             } if model_info.speculative_model else None,
             trust_remote_code=model_info.trust_remote_code,
+            max_model_len=model_info.max_model_len,
             load_format="dummy",
             hf_overrides=hf_overrides,
         )

vllm/model_executor/models/grok1.py

@@ -28,7 +28,7 @@
 import torch.nn.functional as F
 from torch import nn
 
-from vllm.attention import Attention, AttentionMetadata
+from vllm.attention import Attention
 from vllm.compilation.decorators import support_torch_compile
 from vllm.config import CacheConfig, VllmConfig
 from vllm.distributed import get_pp_group, get_tensor_model_parallel_world_size
@@ -182,25 +182,20 @@ def __init__(
                               quant_config=quant_config,
                               logits_soft_cap=attn_logits_soft_cap,
                               prefix=f"{prefix}.attn")
+        self.attn_multiplier = getattr(self.config, "attn_output_multiplier",
+                                       1.0) if self.config else 1.0
 
     def forward(
         self,
         positions: torch.Tensor,
         hidden_states: torch.Tensor,
-        kv_cache: torch.Tensor,
-        attn_metadata: AttentionMetadata,
     ) -> torch.Tensor:
         qkv, _ = self.qkv_proj(hidden_states)
         q, k, v = qkv.split([self.q_size, self.kv_size, self.kv_size], dim=-1)
         q, k = self.rotary_emb(positions, q, k)
-        attn_output = self.attn(q, k, v, kv_cache, attn_metadata)
+        attn_output = self.attn(q, k, v)
         output, _ = self.o_proj(attn_output)
-
-        # Apply attention output multiplier if specified in config
-        attn_multiplier = getattr(self.config, "attn_output_multiplier",
-                                  None) if self.config else None
-        if attn_multiplier is not None:
-            output = output * attn_multiplier
+        output *= self.attn_multiplier
         return output
 
 
@@ -261,8 +256,6 @@ def forward(
         self,
         positions: torch.Tensor,
         hidden_states: torch.Tensor,
-        kv_cache: torch.Tensor,
-        attn_metadata: AttentionMetadata,
         residual: Optional[torch.Tensor],
     ) -> tuple[torch.Tensor, torch.Tensor]:
         # Self Attention
@@ -276,8 +269,6 @@ def forward(
         hidden_states = self.attn(
             positions=positions,
             hidden_states=hidden_states,
-            kv_cache=kv_cache,
-            attn_metadata=attn_metadata,
         )
 
         # Post attention normalization
@@ -341,8 +332,6 @@ def forward(
         self,
         input_ids: torch.Tensor,
         positions: torch.Tensor,
-        kv_caches: list[torch.Tensor],
-        attn_metadata: AttentionMetadata,
         intermediate_tensors: Optional[IntermediateTensors],
         inputs_embeds: Optional[torch.Tensor] = None,
     ) -> Union[torch.Tensor, IntermediateTensors]:
@@ -359,9 +348,7 @@ def forward(
 
         for i in range(self.start_layer, self.end_layer):
             layer = self.layers[i]
-            hidden_states, residual = layer(positions, hidden_states,
-                                            kv_caches[i - self.start_layer],
-                                            attn_metadata, residual)
+            hidden_states, residual = layer(positions, hidden_states, residual)
 
         if not get_pp_group().is_last_rank:
             return IntermediateTensors({
@@ -529,13 +516,10 @@ def forward(
         self,
         input_ids: torch.Tensor,
         positions: torch.Tensor,
-        kv_caches: list[torch.Tensor],
-        attn_metadata: AttentionMetadata,
         intermediate_tensors: Optional[IntermediateTensors] = None,
         inputs_embeds: Optional[torch.Tensor] = None,
     ) -> Union[torch.Tensor, IntermediateTensors]:
-        hidden_states = self.model(input_ids, positions, kv_caches,
-                                   attn_metadata, intermediate_tensors,
+        hidden_states = self.model(input_ids, positions, intermediate_tensors,
                                    inputs_embeds)
         return hidden_states
 

vllm/utils.py

@@ -2794,14 +2794,17 @@ def wrapper(*args, **kwargs):
 
 # Only relevant for models using ALiBi (e.g, MPT)
 def check_use_alibi(model_config: ModelConfig) -> bool:
-    return (getattr(model_config.hf_text_config, "alibi", False)  # Falcon
+    cfg = model_config.hf_text_config
+    return (getattr(cfg, "alibi", False)  # Falcon
             or ("BloomForCausalLM" in getattr(model_config.hf_config,
                                               "architectures", []))  # Bloom
-            or getattr(model_config.hf_text_config, "position_encoding_type",
-                       "") == "alibi"  # codellm_1b_alibi
-            or
-            (hasattr(model_config.hf_text_config, "attn_config")  # MPT
-             and model_config.hf_text_config.attn_config.get("alibi", False)))
+            or getattr(cfg, "position_encoding_type", "") ==
+            "alibi"  # codellm_1b_alibi
+            or (hasattr(cfg, "attn_config")  # MPT
+                and ((isinstance(cfg.attn_config, dict)
+                      and cfg.attn_config.get("alibi", False)) or
+                     (not isinstance(cfg.attn_config, dict)
+                      and getattr(cfg.attn_config, "alibi", False)))))
 
 
 def sha256(input) -> int: