[MODEL] FalconH1 (#18406)

Signed-off-by: dhia.rhaiem <dhia.rhaiem@tii.ae>
Co-authored-by: younesbelkada <younesbelkada@gmail.com>
Co-authored-by: Ilyas Chahed <ilyas.chahed@tii.ae>
Co-authored-by: Jingwei Zuo <jingwei.zuo@tii.ae>

docs/source/models/supported_models.md

@@ -392,6 +392,11 @@ Specified using `--task generate`.
   * `tiiuae/falcon-mamba-7b`, `tiiuae/falcon-mamba-7b-instruct`, etc.
   * ✅︎
   * ✅︎
+- * `FalconH1ForCausalLM`
+  * Falcon-H1
+  * `tiiuae/Falcon-H1-34B-Base`, `tiiuae/Falcon-H1-34B-Instruct`, etc.
+  * ✅︎
+  * ✅︎
 - * `GemmaForCausalLM`
   * Gemma
   * `google/gemma-2b`, `google/gemma-1.1-2b-it`, etc.

tests/models/registry.py

@@ -147,6 +147,9 @@ _TEXT_GENERATION_EXAMPLE_MODELS = {
     "ExaoneForCausalLM": _HfExamplesInfo("LGAI-EXAONE/EXAONE-3.0-7.8B-Instruct"),  # noqa: E501
     "Fairseq2LlamaForCausalLM": _HfExamplesInfo("mgleize/fairseq2-dummy-Llama-3.2-1B"),  # noqa: E501
     "FalconForCausalLM": _HfExamplesInfo("tiiuae/falcon-7b"),
+    "FalconH1ForCausalLM":_HfExamplesInfo("tiiuae/Falcon-H1-1.5B-Instruct",
+                                          is_available_online=False,
+                                          min_transformers_version="4.52.2"),
     "GemmaForCausalLM": _HfExamplesInfo("google/gemma-1.1-2b-it"),
     "Gemma2ForCausalLM": _HfExamplesInfo("google/gemma-2-9b"),
     "Gemma3ForCausalLM": _HfExamplesInfo("google/gemma-3-1b-it"),

vllm/model_executor/layers/mamba/mamba_mixer2.py

@@ -34,7 +34,11 @@ from vllm.model_executor.utils import set_weight_attrs
 @CustomOp.register("mixer2_gated_rms_norm")
 class Mixer2RMSNormGated(CustomOp):
 
-    def __init__(self, full_hidden_size, full_n_groups, eps=1e-6):
+    def __init__(self,
+                 full_hidden_size: int,
+                 full_n_groups: int,
+                 use_rms_norm: bool = True,
+                 eps: float = 1e-6):
         super().__init__()
         self.tp_size = get_tensor_model_parallel_world_size()
         self.tp_rank = get_tensor_model_parallel_rank()
@@ -44,11 +48,17 @@ class Mixer2RMSNormGated(CustomOp):
         self.n_groups = full_hidden_size // self.group_size
 
         self.variance_epsilon = eps
+        self.use_rms_norm = use_rms_norm
+        if self.use_rms_norm:
+            # Register norm weight only if we're actually applying RMSNorm
             self.weight = nn.Parameter(torch.ones(self.per_rank_hidden_size))
             set_weight_attrs(self.weight,
                              {"weight_loader": sharded_weight_loader(0)})
-        assert self.full_hidden_size % self.tp_size== 0,\
-            "Tensor parallel world size must divide hidden size."
+        else:
+            # Avoid checkpoint mismatch by skipping unused parameter
+            self.register_parameter("weight", None)
+        assert (self.full_hidden_size % self.tp_size == 0
+                ), "Tensor parallel world size must divide hidden size."
 
     def forward_native(
         self,
@@ -66,6 +76,8 @@ class Mixer2RMSNormGated(CustomOp):
         #      the input and then redundantly compute the RMSNorm.
         input_dtype = x.dtype
         x = x * nn.functional.silu(gate.to(torch.float32))
+        if not self.use_rms_norm:
+            return x
 
         if self.n_groups == 1:
             if self.tp_size > 1:
@@ -74,7 +86,7 @@ class Mixer2RMSNormGated(CustomOp):
                 global_sums = tensor_model_parallel_all_reduce(local_sums)
                 # Calculate the variance
                 count = self.tp_size * x.shape[-1]
-                variance = (global_sums / count)
+                variance = global_sums / count
 
             else:
                 variance = x.pow(2).mean(-1, keepdim=True)
@@ -106,6 +118,9 @@ class Mixer2RMSNormGated(CustomOp):
         gate: torch.Tensor,
     ) -> Union[torch.Tensor, tuple[torch.Tensor, torch.Tensor]]:
 
+        if not self.use_rms_norm:
+            return x * nn.functional.silu(gate.to(torch.float32))
+
         if self.tp_size > 1 or self.n_groups != 1:
             return self.forward_native(x, gate)
 
@@ -182,13 +197,15 @@ def mamba_v2_sharded_weight_loader(
             #   seem to handle slices well.
             # https://github.com/python/mypy/issues/2410
             param.data[
-                boundary:(boundary + take),  # type: ignore[misc]
-                ...] = loaded_weight[loaded_start_idx:(  # type: ignore[misc]
-                    loaded_start_idx + take)]  # type: ignore[misc]
+                boundary:(boundary + take),
+                ...  # type: ignore[misc]
+            ] = loaded_weight[loaded_start_idx:(loaded_start_idx +
+                                                take)  # type: ignore[misc]
+                              ]  # type: ignore[misc]
 
             # move indexing boundaries
             boundary += shard_size
-            loaded_boundary += (full_dim - extra)
+            loaded_boundary += full_dim - extra
 
     return loader
 
@@ -206,7 +223,8 @@ class MambaMixer2(CustomOp):
     **selective** state spaces)
     """
 
-    def __init__(self,
+    def __init__(
+        self,
         hidden_size: int,
         ssm_state_size: int,
         conv_kernel_size: int,
@@ -217,8 +235,10 @@ class MambaMixer2(CustomOp):
         num_heads: int = 128,
         head_dim: int = 64,
         rms_norm_eps: float = 1e-5,
-                 activation="silu",
-                 quant_config: Optional[QuantizationConfig] = None):
+        activation: str = "silu",
+        use_rms_norm: bool = True,
+        quant_config: Optional[QuantizationConfig] = None,
+    ):
         super().__init__()
 
         # For TP, the sharding plan is as follows:
@@ -238,17 +258,16 @@ class MambaMixer2(CustomOp):
         self.tp_size = get_tensor_model_parallel_world_size()
         tp_rank = get_tensor_model_parallel_rank()
 
-        assert num_heads % self.tp_size == 0, \
-            "Tensor parallel world size must divide num heads."
+        assert (num_heads % self.tp_size == 0
+                ), "Tensor parallel world size must divide num heads."
 
-        assert (n_groups % self.tp_size) == 0 or n_groups == 1, \
-            (
+        assert (n_groups % self.tp_size) == 0 or n_groups == 1, (
             "If tensor parallel world size does not divide num_heads, "
-                "then num_groups must equal 1."
-            )
+            "then num_groups must equal 1.")
 
-        assert self.tp_size == 1 or quant_config is None, \
-            "Tensor parallel currently not supported for quantized models."
+        assert (
+            self.tp_size == 1 or quant_config is None
+        ), "Tensor parallel currently not supported for quantized models."
 
         self.ssm_state_size = ssm_state_size
         self.activation = activation
@@ -265,8 +284,7 @@ class MambaMixer2(CustomOp):
             self.n_groups = n_groups + extra_groups_for_head_shards(
                 n_groups, self.tp_size)
 
-        self.conv_dim = (intermediate_size +
-                         2 * self.n_groups * ssm_state_size)
+        self.conv_dim = intermediate_size + 2 * self.n_groups * ssm_state_size
         self.conv1d = ColumnParallelLinear(
             input_size=conv_kernel_size,
             output_size=self.conv_dim,
@@ -279,11 +297,12 @@ class MambaMixer2(CustomOp):
         # doesn't allow to override it
         self.conv1d.weight.data = self.conv1d.weight.data.unsqueeze(1)
 
-        self.in_proj = ColumnParallelLinear(input_size=hidden_size,
-                                            output_size=intermediate_size +
-                                            self.conv_dim + self.num_heads,
+        self.in_proj = ColumnParallelLinear(
+            input_size=hidden_size,
+            output_size=intermediate_size + self.conv_dim + self.num_heads,
             bias=use_bias,
-                                            quant_config=quant_config)
+            quant_config=quant_config,
+        )
 
         # - because in_proj is a concatenation of 3 weights, we
         #   need to interleave them before sharding
@@ -305,7 +324,8 @@ class MambaMixer2(CustomOp):
         # - ditto for the otther two weights below
         delattr(self.conv1d.bias, "weight_loader")
         set_weight_attrs(
-            self.conv1d.bias, {
+            self.conv1d.bias,
+            {
                 "weight_loader":
                 mamba_v2_sharded_weight_loader(
                     [
@@ -316,18 +336,25 @@ class MambaMixer2(CustomOp):
                     self.tp_size,
                     tp_rank,
                 )
-            })
+            },
+        )
 
         delattr(self.conv1d.weight, "weight_loader")
         set_weight_attrs(
-            self.conv1d.weight, {
+            self.conv1d.weight,
+            {
                 "weight_loader":
-                mamba_v2_sharded_weight_loader([
+                mamba_v2_sharded_weight_loader(
+                    [
                         intermediate_settings,
                         group_shard_settings,
                         group_shard_settings,
-                ], self.tp_size, tp_rank)
-            })
+                    ],
+                    self.tp_size,
+                    tp_rank,
+                )
+            },
+        )
 
         if quant_config is None:
             # - quant layers do not have a weight loader
@@ -345,8 +372,10 @@ class MambaMixer2(CustomOp):
                             head_setings,  # for dt
                         ],
                         self.tp_size,
-                        tp_rank)
-                })
+                        tp_rank,
+                    )
+                },
+            )
 
         # - these are TPed by heads to reduce the size of the
         #   temporal shape
@@ -357,6 +386,7 @@ class MambaMixer2(CustomOp):
             ))
         self.D = nn.Parameter(torch.ones(num_heads // self.tp_size))
         self.dt_bias = nn.Parameter(torch.ones(num_heads // self.tp_size))
+        self.use_rms_norm = use_rms_norm
 
         set_weight_attrs(self.D, {"weight_loader": sharded_weight_loader(0)})
         a_weight_loader = composed_weight_loader(
@@ -365,18 +395,25 @@ class MambaMixer2(CustomOp):
         set_weight_attrs(self.dt_bias,
                          {"weight_loader": sharded_weight_loader(0)})
 
-        self.out_proj = RowParallelLinear(intermediate_size,
+        self.out_proj = RowParallelLinear(
+            intermediate_size,
             hidden_size,
             bias=use_bias,
             input_is_parallel=True,
-                                          quant_config=quant_config)
+            quant_config=quant_config,
+        )
 
         self.norm = Mixer2RMSNormGated(intermediate_size,
                                        n_groups,
+                                       self.use_rms_norm,
                                        eps=rms_norm_eps)
 
-    def forward_native(self, hidden_states: torch.Tensor,
-                       conv_state: torch.Tensor, ssm_state: torch.Tensor):
+    def forward_native(
+        self,
+        hidden_states: torch.Tensor,
+        conv_state: torch.Tensor,
+        ssm_state: torch.Tensor,
+    ):
         pass
 
     def forward_cuda(
@@ -384,6 +421,7 @@ class MambaMixer2(CustomOp):
         hidden_states: torch.Tensor,
         mamba_cache_params: MambaCacheParams,
         mamba2_metadata: Mamba2Metadata,
+        mup_vector: Optional[torch.Tensor] = None,
     ):
         # mamba2_metadata contains metadata necessary for the mamba2 triton
         # kernels to operate in continuous batching and in chunked prefill
@@ -401,6 +439,10 @@ class MambaMixer2(CustomOp):
 
         # 1. Gated MLP's linear projection
         projected_states, _ = self.in_proj(hidden_states)
+
+        if mup_vector is not None:
+            projected_states = projected_states * mup_vector
+
         gate, hidden_states_B_C, dt = torch.split(
             projected_states,
             [
@@ -561,6 +603,9 @@ class MambaMixer2(CustomOp):
         hidden_states = torch.vstack(ssd_output_list)
 
         # 4. gated MLP
+        # GatedRMSNorm internally applying SiLU to the gate
+        # SiLU is applied internally before normalization, unlike standard
+        # norm usage
         hidden_states = self.norm(hidden_states, gate)
 
         # 5. Final linear projection

vllm/model_executor/models/registry.py

@@ -79,6 +79,7 @@ _TEXT_GENERATION_MODELS = {
     "LLaMAForCausalLM": ("llama", "LlamaForCausalLM"),
     "MambaForCausalLM": ("mamba", "MambaForCausalLM"),
     "FalconMambaForCausalLM": ("mamba", "MambaForCausalLM"),
+    "FalconH1ForCausalLM":("falcon_h1", "FalconH1ForCausalLM"),
     "Mamba2ForCausalLM": ("mamba2", "Mamba2ForCausalLM"),
     "MiniCPMForCausalLM": ("minicpm", "MiniCPMForCausalLM"),
     "MiniCPM3ForCausalLM": ("minicpm3", "MiniCPM3ForCausalLM"),