Llama3.2 vision model support (#1551)

python/pyproject.toml

@@ -8,16 +8,12 @@ version = "0.3.4"
 description = "SGLang is yet another fast serving framework for large language models and vision language models."
 readme = "README.md"
 requires-python = ">=3.8"
-license = {file = "LICENSE"}
+license = { file = "LICENSE" }
 classifiers = [
     "Programming Language :: Python :: 3",
     "License :: OSI Approved :: Apache Software License",
 ]
-dependencies = [
-    "requests",
-    "tqdm",
-    "numpy",
-]
+dependencies = ["requests", "tqdm", "numpy"]
 
 [project.optional-dependencies]
 runtime_common = ["aiohttp", "decord", "fastapi", "hf_transfer", "huggingface_hub", "interegular",
@@ -32,7 +28,14 @@ srt_xpu = ["sglang[runtime_common]"]
 openai = ["openai>=1.0", "tiktoken"]
 anthropic = ["anthropic>=0.20.0"]
 litellm = ["litellm>=1.0.0"]
-test = ["jsonlines", "matplotlib", "pandas", "sentence_transformers", "accelerate", "peft"]
+test = [
+    "jsonlines",
+    "matplotlib",
+    "pandas",
+    "sentence_transformers",
+    "accelerate",
+    "peft",
+]
 all = ["sglang[srt]", "sglang[openai]", "sglang[anthropic]", "sglang[litellm]"]
 all_xpu = ["sglang[srt_xpu]", "sglang[openai]", "sglang[anthropic]", "sglang[litellm]"]
 dev = ["sglang[all]", "sglang[test]"]
@@ -43,7 +46,23 @@ dev_xpu = ["sglang[all_xpu]", "sglang[test]"]
 "Bug Tracker" = "https://github.com/sgl-project/sglang/issues"
 
 [tool.setuptools.packages.find]
-exclude = ["assets*", "benchmark*", "docs*", "dist*", "playground*", "scripts*", "tests*"]
+exclude = [
+    "assets*",
+    "benchmark*",
+    "docs*",
+    "dist*",
+    "playground*",
+    "scripts*",
+    "tests*",
+]
 
 [tool.wheel]
-exclude = ["assets*", "benchmark*", "docs*", "dist*", "playground*", "scripts*", "tests*"]
+exclude = [
+    "assets*",
+    "benchmark*",
+    "docs*",
+    "dist*",
+    "playground*",
+    "scripts*",
+    "tests*",
+]

python/sglang/bench_latency.py

@@ -227,8 +227,9 @@ def extend(reqs, model_runner):
         req_to_token_pool=model_runner.req_to_token_pool,
         token_to_kv_pool=model_runner.token_to_kv_pool,
         tree_cache=None,
+        model_config=model_runner.model_config,
     )
-    batch.prepare_for_extend(model_runner.model_config.vocab_size)
+    batch.prepare_for_extend()
     model_worker_batch = batch.get_model_worker_batch()
     forward_batch = ForwardBatch.init_new(model_worker_batch, model_runner)
     logits_output = model_runner.forward(forward_batch)

python/sglang/lang/chat_template.py

@@ -229,6 +229,7 @@ register_chat_template(
             ),
         },
         stop_str=("<|eot_id|>",),
+        image_token="<|image|>",
     )
 )
 

python/sglang/srt/configs/model_config.py

@@ -89,6 +89,8 @@ class ModelConfig:
         self.num_hidden_layers = self.hf_text_config.num_hidden_layers
         self.vocab_size = self.hf_text_config.vocab_size
 
+        self.is_encoder_decoder = self.hf_config.model_type in ["mllama"]
+
     # adapted from https://github.com/vllm-project/vllm/blob/main/vllm/config.py#L289
     def get_total_num_kv_heads(self) -> int:
         """Returns the total number of KV heads."""

python/sglang/srt/conversation.py

@@ -509,6 +509,19 @@ register_conv_template(
     )
 )
 
+register_conv_template(
+    Conversation(
+        name="llama_3_vision",
+        system_message="You are a helpful language and vision assistant. You are able to understand the visual content that the user provides, and assist the user with a variety of tasks using natural language.",
+        system_template="<|start_header_id|>system<|end_header_id|>\n\n{system_message}<|eot_id|>",
+        roles=("user", "assistant"),
+        sep_style=SeparatorStyle.LLAMA3,
+        sep="",
+        stop_str=["<|end_of_text|>", "<|eot_id|>"],
+        image_token="<|image|>",
+    )
+)
+
 register_conv_template(
     Conversation(
         name="llava_llama_3",

python/sglang/srt/layers/attention/__init__.py

@@ -1,8 +1,10 @@
 from abc import ABC, abstractmethod
+from typing import Optional
 
 import torch
 from torch import nn
 
+from sglang.srt.layers.radix_attention import RadixAttention
 from sglang.srt.model_executor.forward_batch_info import ForwardBatch
 
 
@@ -19,7 +21,11 @@ class AttentionBackend(ABC):
         raise NotImplementedError()
 
     def init_forward_metadata_capture_cuda_graph(
-        self, bs: int, req_pool_indices: torch.Tensor, seq_lens: torch.Tensor
+        self,
+        bs: int,
+        req_pool_indices: torch.Tensor,
+        seq_lens: torch.Tensor,
+        encoder_lens: Optional[torch.Tensor] = None,
     ):
         """Init the metadata for a forward pass for capturing a cuda graph."""
         raise NotImplementedError()
@@ -30,6 +36,7 @@ class AttentionBackend(ABC):
         req_pool_indices: torch.Tensor,
         seq_lens: torch.Tensor,
         seq_lens_sum: int,
+        encoder_lens: Optional[torch.Tensor] = None,
     ):
         """Init the metadata for a forward pass for replying a cuda graph."""
         raise NotImplementedError()
@@ -43,7 +50,7 @@ class AttentionBackend(ABC):
         q: torch.Tensor,
         k: torch.Tensor,
         v: torch.Tensor,
-        layer: nn.Module,
+        layer: RadixAttention,
         forward_batch: ForwardBatch,
     ):
         """Run forward on an attention layer."""
@@ -57,7 +64,7 @@ class AttentionBackend(ABC):
         q: torch.Tensor,
         k: torch.Tensor,
         v: torch.Tensor,
-        layer: nn.Module,
+        layer: RadixAttention,
         forward_batch: ForwardBatch,
     ):
         """Run a forward for decode."""
@@ -68,7 +75,7 @@ class AttentionBackend(ABC):
         q: torch.Tensor,
         k: torch.Tensor,
         v: torch.Tensor,
-        layer: nn.Module,
+        layer: RadixAttention,
         forward_batch: ForwardBatch,
     ):
         """Run a forward for extend."""

python/sglang/srt/layers/attention/double_sparsity_backend.py

@@ -10,6 +10,7 @@ from sglang.srt.managers.schedule_batch import global_server_args_dict
 from sglang.srt.model_executor.forward_batch_info import ForwardBatch
 
 if TYPE_CHECKING:
+    from sglang.srt.layers.radix_attention import RadixAttention
     from sglang.srt.model_executor.model_runner import ModelRunner
 
 
@@ -134,8 +135,13 @@ class DoubleSparseAttnBackend(AttentionBackend):
         )
 
     def init_forward_metadata_capture_cuda_graph(
-        self, bs: int, req_pool_indices: torch.Tensor, seq_lens: torch.Tensor
+        self,
+        bs: int,
+        req_pool_indices: torch.Tensor,
+        seq_lens: torch.Tensor,
+        encoder_lens=None,
     ):
+        # NOTE: encoder_lens expected to be zeros or None
         self.forward_metadata = (
             self.cuda_graph_start_loc,
             self.cuda_graph_attn_logits,
@@ -149,14 +155,18 @@ class DoubleSparseAttnBackend(AttentionBackend):
         req_pool_indices: torch.Tensor,
         seq_lens: torch.Tensor,
         seq_lens_sum: int,
+        encoder_lens=None,
     ):
+        # NOTE: encoder_lens expected to be zeros or None
         self.cuda_graph_start_loc.zero_()
         self.cuda_graph_start_loc[1:bs] = torch.cumsum(seq_lens[: bs - 1], dim=0)
 
     def get_cuda_graph_seq_len_fill_value(self):
         return 1
 
-    def forward_extend(self, q, k, v, layer: nn.Module, forward_batch: ForwardBatch):
+    def forward_extend(
+        self, q, k, v, layer: RadixAttention, forward_batch: ForwardBatch
+    ):
         # TODO: reuse the buffer across layers
         if layer.qk_head_dim != layer.v_head_dim:
             o = q.new_empty((q.shape[0], layer.tp_q_head_num * layer.v_head_dim))
@@ -172,7 +182,7 @@ class DoubleSparseAttnBackend(AttentionBackend):
         )
 
         forward_batch.token_to_kv_pool.set_kv_buffer(
-            layer.layer_id, forward_batch.out_cache_loc, k, v, k_label
+            layer, forward_batch.out_cache_loc, k, v, k_label
         )
 
         (
@@ -201,7 +211,9 @@ class DoubleSparseAttnBackend(AttentionBackend):
         )
         return o
 
-    def forward_decode(self, q, k, v, layer: nn.Module, forward_batch: ForwardBatch):
+    def forward_decode(
+        self, q, k, v, layer: RadixAttention, forward_batch: ForwardBatch
+    ):
         # During torch.compile, there is a bug in rotary_emb that causes the
         # output value to have a 3D tensor shape. This reshapes the output correctly.
         q = q.reshape(-1, layer.tp_q_head_num * layer.qk_head_dim)
@@ -231,7 +243,7 @@ class DoubleSparseAttnBackend(AttentionBackend):
         )
 
         forward_batch.token_to_kv_pool.set_kv_buffer(
-            layer.layer_id, forward_batch.out_cache_loc, k, v, k_label
+            layer, forward_batch.out_cache_loc, k, v, k_label
         )
 
         # NOTE(Andy) shouldn't be used when max_len_in_batch < heavy_token_num

python/sglang/srt/layers/attention/flashinfer_backend.py

@@ -11,7 +11,6 @@ from enum import Enum, auto
 from typing import TYPE_CHECKING
 
 import torch
-import torch.nn as nn
 import triton
 import triton.language as tl
 
@@ -21,6 +20,7 @@ from sglang.srt.model_executor.forward_batch_info import ForwardBatch
 from sglang.srt.utils import is_flashinfer_available
 
 if TYPE_CHECKING:
+    from sglang.srt.layers.radix_attention import RadixAttention
     from sglang.srt.model_executor.model_runner import ModelRunner
 
 if is_flashinfer_available():
@@ -56,13 +56,13 @@ class FlashInferAttnBackend(AttentionBackend):
 
         assert not (
             model_runner.sliding_window_size is not None
-            and model_runner.has_cross_attention
+            and model_runner.model_config.is_encoder_decoder
         ), "Sliding window and cross attention are not supported together"
 
         if model_runner.sliding_window_size is not None:
             self.num_wrappers = 2
             self.dispatch_reason = WrapperDispatch.SLIDING_WINDOW
-        elif model_runner.has_cross_attention:
+        elif model_runner.model_config.is_encoder_decoder:
             self.num_wrappers = 2
             self.dispatch_reason = WrapperDispatch.CROSS_ATTENTION
         else:
@@ -128,6 +128,8 @@ class FlashInferAttnBackend(AttentionBackend):
                 forward_batch.req_pool_indices,
                 forward_batch.seq_lens,
                 forward_batch.seq_lens_sum,
+                decode_wrappers=None,
+                encoder_lens=forward_batch.encoder_lens,
             )
             self.forward_metadata = (self.decode_wrappers,)
         else:
@@ -144,13 +146,11 @@ class FlashInferAttnBackend(AttentionBackend):
                 forward_batch.req_pool_indices,
                 forward_batch.seq_lens,
                 prefix_lens,
-                use_ragged,
+                use_ragged=use_ragged,
+                encoder_lens=forward_batch.encoder_lens,
             )
 
-            self.forward_metadata = (
-                use_ragged,
-                extend_no_prefix,
-            )
+            self.forward_metadata = (use_ragged, extend_no_prefix)
 
     def init_cuda_graph_state(self, max_bs: int):
         cuda_graph_kv_indices = torch.zeros(
@@ -163,7 +163,11 @@ class FlashInferAttnBackend(AttentionBackend):
         ]
 
     def init_forward_metadata_capture_cuda_graph(
-        self, bs: int, req_pool_indices: torch.Tensor, seq_lens: torch.Tensor
+        self,
+        bs: int,
+        req_pool_indices: torch.Tensor,
+        seq_lens: torch.Tensor,
+        encoder_lens: torch.Tensor = None,
     ):
         decode_wrappers = []
         for i in range(self.num_wrappers):
@@ -181,7 +185,11 @@ class FlashInferAttnBackend(AttentionBackend):
 
         seq_lens_sum = seq_lens.sum().item()
         self.indices_updater_decode.update(
-            req_pool_indices, seq_lens, seq_lens_sum, decode_wrappers
+            req_pool_indices,
+            seq_lens,
+            seq_lens_sum,
+            decode_wrappers=decode_wrappers,
+            encoder_lens=encoder_lens,
         )
         self.cuda_graph_metadata[bs] = decode_wrappers
         self.forward_metadata = (decode_wrappers,)
@@ -192,34 +200,42 @@ class FlashInferAttnBackend(AttentionBackend):
         req_pool_indices: torch.Tensor,
         seq_lens: torch.Tensor,
         seq_lens_sum: int,
+        encoder_lens: torch.Tensor = None,
     ):
         self.indices_updater_decode.update(
             req_pool_indices[:bs],
             seq_lens[:bs],
             seq_lens_sum,
-            self.cuda_graph_metadata[bs],
+            decode_wrappers=self.cuda_graph_metadata[bs],
+            encoder_lens=encoder_lens[:bs] if encoder_lens is not None else None,
         )
 
     def get_cuda_graph_seq_len_fill_value(self):
         return 0
 
-    def forward_extend(self, q, k, v, layer: nn.Module, forward_batch: ForwardBatch):
+    def forward_extend(
+        self, q, k, v, layer: RadixAttention, forward_batch: ForwardBatch
+    ):
         prefill_wrapper_paged = self.prefill_wrappers_paged[
             self._get_wrapper_idx(layer)
         ]
 
         use_ragged, extend_no_prefix = self.forward_metadata
+        cache_loc = (
+            forward_batch.out_cache_loc
+            if not layer.is_cross_attention
+            else forward_batch.encoder_out_cache_loc
+        )
 
         if not use_ragged:
             if k is not None:
                 assert v is not None
-                forward_batch.token_to_kv_pool.set_kv_buffer(
-                    layer.layer_id, forward_batch.out_cache_loc, k, v
-                )
+                forward_batch.token_to_kv_pool.set_kv_buffer(layer, cache_loc, k, v)
+
             o = prefill_wrapper_paged.forward(
                 q.contiguous().view(-1, layer.tp_q_head_num, layer.head_dim),
                 forward_batch.token_to_kv_pool.get_kv_buffer(layer.layer_id),
-                causal=True,
+                causal=not layer.is_cross_attention,
                 sm_scale=layer.scaling,
                 window_left=layer.sliding_window_size,
                 logits_soft_cap=layer.logit_cap,
@@ -247,20 +263,23 @@ class FlashInferAttnBackend(AttentionBackend):
 
                 o, _ = merge_state(o1, s1, o2, s2)
 
-            forward_batch.token_to_kv_pool.set_kv_buffer(
-                layer.layer_id, forward_batch.out_cache_loc, k, v
-            )
+            forward_batch.token_to_kv_pool.set_kv_buffer(layer, cache_loc, k, v)
 
         return o.view(-1, layer.tp_q_head_num * layer.head_dim)
 
-    def forward_decode(self, q, k, v, layer: nn.Module, forward_batch: ForwardBatch):
+    def forward_decode(
+        self, q, k, v, layer: RadixAttention, forward_batch: ForwardBatch
+    ):
         decode_wrapper = self.forward_metadata[0][self._get_wrapper_idx(layer)]
+        cache_loc = (
+            forward_batch.out_cache_loc
+            if not layer.is_cross_attention
+            else forward_batch.encoder_out_cache_loc
+        )
 
         if k is not None:
             assert v is not None
-            forward_batch.token_to_kv_pool.set_kv_buffer(
-                layer.layer_id, forward_batch.out_cache_loc, k, v
-            )
+            forward_batch.token_to_kv_pool.set_kv_buffer(layer, cache_loc, k, v)
 
         o = decode_wrapper.forward(
             q.contiguous().view(-1, layer.tp_q_head_num, layer.head_dim),
@@ -271,7 +290,7 @@ class FlashInferAttnBackend(AttentionBackend):
 
         return o.view(-1, layer.tp_q_head_num * layer.head_dim)
 
-    def _get_wrapper_idx(self, layer: nn.Module):
+    def _get_wrapper_idx(self, layer: RadixAttention):
         if self.num_wrappers == 1:
             return 0
 
@@ -298,6 +317,8 @@ class FlashInferIndicesUpdaterDecode:
         self.max_context_len = model_runner.req_to_token_pool.req_to_token.size(1)
         self.sliding_window_size = model_runner.sliding_window_size
 
+        self.attn_backend = attn_backend
+
         # Buffers and wrappers
         self.kv_indptr = attn_backend.kv_indptr
         self.kv_last_page_len = attn_backend.kv_last_page_len
@@ -305,20 +326,27 @@ class FlashInferIndicesUpdaterDecode:
         self.decode_wrappers = attn_backend.decode_wrappers
 
         # Dispatch
-        if attn_backend.dispatch_reason == WrapperDispatch.SLIDING_WINDOW:
+        if self.attn_backend.dispatch_reason == WrapperDispatch.SLIDING_WINDOW:
             self.update = self.update_sliding_window
-        elif attn_backend.dispatch_reason == WrapperDispatch.CROSS_ATTENTION:
+        elif self.attn_backend.dispatch_reason == WrapperDispatch.CROSS_ATTENTION:
             self.update = self.update_cross_attention
         else:
-            assert attn_backend.num_wrappers == 1
+            assert self.attn_backend.num_wrappers == 1
             self.update = self.update_single_wrapper
 
+    def update(
+        self, req_pool_indices, seq_lens, seq_lens_sum, decode_wrappers, encoder_lens
+    ):
+        # Keep the signature for type checking, will be initialized during runtime
+        raise NotImplementedError()
+
     def update_single_wrapper(
         self,
         req_pool_indices: torch.Tensor,
         seq_lens: torch.Tensor,
         seq_lens_sum: int,
         decode_wrappers=None,
+        encoder_lens=None,
     ):
         decode_wrappers = decode_wrappers or self.decode_wrappers
         self.call_begin_forward(
@@ -336,6 +364,7 @@ class FlashInferIndicesUpdaterDecode:
         seq_lens: torch.Tensor,
         seq_lens_sum: int,
         decode_wrappers=None,
+        encoder_lens=None,
     ):
         decode_wrappers = decode_wrappers or self.decode_wrappers
 
@@ -363,8 +392,35 @@ class FlashInferIndicesUpdaterDecode:
                 kv_start_idx_tmp,
             )
 
-    def update_cross_attention(self):
-        raise NotImplementedError()
+    def update_cross_attention(
+        self,
+        req_pool_indices,
+        seq_lens,
+        seq_lens_sum,
+        decode_wrappers=None,
+        encoder_lens=None,
+    ):
+        decode_wrappers = decode_wrappers or self.decode_wrappers
+
+        for wrapper_id in range(2):
+            if wrapper_id == 0:
+                # Normal attention
+                paged_kernel_lens = seq_lens
+                kv_start_idx = encoder_lens
+            else:
+                # Cross attention
+                paged_kernel_lens = encoder_lens
+                kv_start_idx = torch.zeros_like(encoder_lens)
+                seq_lens_sum = encoder_lens.sum().item()
+
+            self.call_begin_forward(
+                decode_wrappers[wrapper_id],
+                req_pool_indices,
+                paged_kernel_lens,
+                seq_lens_sum,
+                self.kv_indptr[wrapper_id],
+                kv_start_idx,
+            )
 
     def call_begin_forward(
         self,
@@ -421,6 +477,8 @@ class FlashInferIndicesUpdaterPrefill:
         self.max_context_len = model_runner.req_to_token_pool.req_to_token.size(1)
         self.sliding_window_size = model_runner.sliding_window_size
 
+        self.attn_backend = attn_backend
+
         # Buffers and wrappers
         self.kv_indptr = attn_backend.kv_indptr
         self.kv_last_page_len = attn_backend.kv_last_page_len
@@ -430,16 +488,20 @@ class FlashInferIndicesUpdaterPrefill:
         self.wrappers_paged = attn_backend.prefill_wrappers_paged
 
         # Dispatch
-        if attn_backend.dispatch_reason == WrapperDispatch.SLIDING_WINDOW:
+        if self.attn_backend.dispatch_reason == WrapperDispatch.SLIDING_WINDOW:
             self.update = self.update_sliding_window
-        elif attn_backend.dispatch_reason == WrapperDispatch.CROSS_ATTENTION:
+        elif self.attn_backend.dispatch_reason == WrapperDispatch.CROSS_ATTENTION:
             self.update = self.update_cross_attention
         else:
-            assert attn_backend.num_wrappers == 1
+            assert self.attn_backend.num_wrappers == 1
             self.update = self.update_single_wrapper
 
+    def update(self, req_pool_indices, seq_lens, prefix_lens, use_ragged, encoder_lens):
+        # Keep the signature for type checking, will be initialized during runtime
+        raise NotImplementedError()
+
     def update_single_wrapper(
-        self, req_pool_indices, seq_lens, prefix_lens, use_ragged
+        self, req_pool_indices, seq_lens, prefix_lens, use_ragged, encoder_lens
     ):
         if use_ragged:
             paged_kernel_lens = prefix_lens
@@ -460,7 +522,7 @@ class FlashInferIndicesUpdaterPrefill:
         )
 
     def update_sliding_window(
-        self, req_pool_indices, seq_lens, prefix_lens, use_ragged
+        self, req_pool_indices, seq_lens, prefix_lens, use_ragged, encoder_lens
     ):
         for wrapper_id in range(2):
             if wrapper_id == 0:
@@ -487,8 +549,31 @@ class FlashInferIndicesUpdaterPrefill:
                 use_ragged,
             )
 
-    def update_cross_attention(self):
-        raise NotImplementedError()
+    def update_cross_attention(
+        self, req_pool_indices, seq_lens, prefix_lens, use_ragged, encoder_lens
+    ):
+        for wrapper_id in range(2):
+            if wrapper_id == 0:
+                # normal attention
+                paged_kernel_lens = seq_lens
+                kv_start_idx = encoder_lens
+            else:
+                # cross attention
+                paged_kernel_lens = encoder_lens
+                kv_start_idx = torch.zeros_like(encoder_lens)
+
+            self.call_begin_forward(
+                self.wrapper_ragged,
+                self.wrappers_paged[wrapper_id],
+                req_pool_indices,
+                paged_kernel_lens,
+                seq_lens,
+                prefix_lens,
+                kv_start_idx,
+                self.kv_indptr[wrapper_id],
+                self.qo_indptr[wrapper_id],
+                use_ragged,
+            )
 
     def call_begin_forward(
         self,

python/sglang/srt/layers/attention/triton_backend.py

@@ -10,6 +10,7 @@ from sglang.srt.managers.schedule_batch import global_server_args_dict
 from sglang.srt.model_executor.forward_batch_info import ForwardBatch
 
 if TYPE_CHECKING:
+    from sglang.srt.layers.radix_attention import RadixAttention
     from sglang.srt.model_executor.model_runner import ModelRunner
 
 
@@ -81,8 +82,13 @@ class TritonAttnBackend(AttentionBackend):
         )
 
     def init_forward_metadata_capture_cuda_graph(
-        self, bs: int, req_pool_indices: torch.Tensor, seq_lens: torch.Tensor
+        self,
+        bs: int,
+        req_pool_indices: torch.Tensor,
+        seq_lens: torch.Tensor,
+        encoder_lens=None,
     ):
+        # NOTE: encoder_lens expected to be zeros or None
         self.forward_metadata = (
             self.cuda_graph_start_loc,
             self.cuda_graph_attn_logits,
@@ -96,14 +102,18 @@ class TritonAttnBackend(AttentionBackend):
         req_pool_indices: torch.Tensor,
         seq_lens: torch.Tensor,
         seq_lens_sum: int,
+        encoder_lens=None,
     ):
+        # NOTE: encoder_lens expected to be zeros or None
         self.cuda_graph_start_loc.zero_()
         self.cuda_graph_start_loc[1:bs] = torch.cumsum(seq_lens[: bs - 1], dim=0)
 
     def get_cuda_graph_seq_len_fill_value(self):
         return 1
 
-    def forward_extend(self, q, k, v, layer: nn.Module, forward_batch: ForwardBatch):
+    def forward_extend(
+        self, q, k, v, layer: RadixAttention, forward_batch: ForwardBatch
+    ):
         # TODO: reuse the buffer across layers
         if layer.qk_head_dim != layer.v_head_dim:
             o = q.new_empty((q.shape[0], layer.tp_q_head_num * layer.v_head_dim))
@@ -111,7 +121,7 @@ class TritonAttnBackend(AttentionBackend):
             o = torch.empty_like(q)
 
         forward_batch.token_to_kv_pool.set_kv_buffer(
-            layer.layer_id, forward_batch.out_cache_loc, k, v
+            layer, forward_batch.out_cache_loc, k, v
         )
 
         start_loc, attn_logits, max_seq_len, max_extend_len = self.forward_metadata
@@ -133,7 +143,9 @@ class TritonAttnBackend(AttentionBackend):
         )
         return o
 
-    def forward_decode(self, q, k, v, layer: nn.Module, forward_batch: ForwardBatch):
+    def forward_decode(
+        self, q, k, v, layer: RadixAttention, forward_batch: ForwardBatch
+    ):
         # During torch.compile, there is a bug in rotary_emb that causes the
         # output value to have a 3D tensor shape. This reshapes the output correctly.
         q = q.reshape(-1, layer.tp_q_head_num * layer.qk_head_dim)
@@ -147,7 +159,7 @@ class TritonAttnBackend(AttentionBackend):
         start_loc, attn_logits, max_seq_len, max_extend_len = self.forward_metadata
 
         forward_batch.token_to_kv_pool.set_kv_buffer(
-            layer.layer_id, forward_batch.out_cache_loc, k, v
+            layer, forward_batch.out_cache_loc, k, v
         )
 
         self.decode_attention_fwd(

python/sglang/srt/managers/image_processor.py

@@ -33,20 +33,9 @@ def init_global_processor(server_args: ServerArgs):
 
 
 class BaseImageProcessor(ABC):
-    @abstractmethod
-    async def process_images_async(self, image_data, **kwargs):
-        pass
-
-
-class DummyImageProcessor(BaseImageProcessor):
-    async def process_images_async(self, *args, **kwargs):
-        return None
-
-
-class LlavaImageProcessor(BaseImageProcessor):
-    def __init__(self, hf_config, server_args, _image_processor):
+    def __init__(self, hf_config, server_args, _processor):
         self.hf_config = hf_config
-        self._image_processor = _image_processor
+        self._processor = _processor
         self.executor = concurrent.futures.ProcessPoolExecutor(
             initializer=init_global_processor,
             mp_context=mp.get_context("fork"),
@@ -54,6 +43,23 @@ class LlavaImageProcessor(BaseImageProcessor):
             max_workers=os.environ.get("SGLANG_CPU_COUNT", os.cpu_count()),
         )
 
+    @abstractmethod
+    async def process_images_async(self, image_data, input_text, **kwargs):
+        pass
+
+
+class DummyImageProcessor(BaseImageProcessor):
+    def __init__(self):
+        pass
+
+    async def process_images_async(self, *args, **kwargs):
+        return None
+
+
+class LlavaImageProcessor(BaseImageProcessor):
+    def __init__(self, hf_config, server_args, _processor):
+        super().__init__(hf_config, server_args, _processor)
+
     @staticmethod
     def _process_single_image_task(
         image_data: Union[str, bytes],
@@ -119,7 +125,7 @@ class LlavaImageProcessor(BaseImageProcessor):
             )
 
     async def process_images_async(
-        self, image_data: List[Union[str, bytes]], request_obj
+        self, image_data: List[Union[str, bytes]], input_text, request_obj
     ):
         if not image_data:
             return None
@@ -177,6 +183,54 @@ class LlavaImageProcessor(BaseImageProcessor):
         }
 
 
+class MllamaImageProcessor(BaseImageProcessor):
+    def __init__(self, hf_config, server_args, _processor):
+        super().__init__(hf_config, server_args, _processor)
+
+    @staticmethod
+    def _process_single_image_task(images, input_text):
+        # input_ids', 'attention_mask', 'pixel_values', 'aspect_ratio_ids', 'aspect_ratio_mask', 'cross_attention_mask'
+        return global_processor(images, input_text, return_tensors="pt")
+
+    async def _process_single_image(self, images, input_text):
+        if self.executor is not None:
+            loop = asyncio.get_event_loop()
+            image_inputs = await loop.run_in_executor(
+                self.executor,
+                MllamaImageProcessor._process_single_image_task,
+                images,
+                input_text,
+            )
+        else:
+            image_inputs = self._processor(images, input_text, return_tensors="pt")
+
+        return image_inputs
+
+    async def process_images_async(
+        self, image_data: List[Union[str, bytes]], input_text, *args, **kwargs
+    ):
+        if not image_data:
+            return None
+
+        if isinstance(input_text, list):
+            assert len(input_text) and isinstance(input_text[0], int)
+            input_text = self._processor.tokenizer.decode(input_text)
+
+        if not isinstance(image_data, list):
+            image_data = [image_data]
+
+        if len(image_data) > 0:
+            images = [load_image(image)[0] for image in image_data]
+        else:
+            images = load_image(image_data[0])[0]
+
+        image_inputs = await self._process_single_image(images, input_text)
+        image_inputs["image_hashes"] = [hash(str(image_data))]
+        image_inputs["input_ids"] = image_inputs["input_ids"].tolist()[0]
+
+        return image_inputs
+
+
 class Qwen2VLImageProcessor(BaseImageProcessor):
     def __init__(self, hf_config, server_args, _image_processor):
         self.hf_config = hf_config
@@ -237,7 +291,7 @@ class Qwen2VLImageProcessor(BaseImageProcessor):
             return self._process_single_image_task(image_data)
 
     async def process_images_async(
-        self, image_data: List[Union[str, bytes]], request_obj
+        self, image_data: List[Union[str, bytes]], input_text, request_obj
     ):
         if not image_data:
             return None
@@ -292,12 +346,14 @@ class Qwen2VLImageProcessor(BaseImageProcessor):
 
 
 def get_image_processor(
-    hf_config, server_args: ServerArgs, _image_processor
+    hf_config, server_args: ServerArgs, processor
 ) -> BaseImageProcessor:
-    if "Qwen2VLForConditionalGeneration" in hf_config.architectures:
-        return Qwen2VLImageProcessor(hf_config, server_args, _image_processor)
+    if "MllamaForConditionalGeneration" in hf_config.architectures:
+        return MllamaImageProcessor(hf_config, server_args, processor)
+    elif "Qwen2VLForConditionalGeneration" in hf_config.architectures:
+        return Qwen2VLImageProcessor(hf_config, server_args, processor.image_processor)
     else:
-        return LlavaImageProcessor(hf_config, server_args, _image_processor)
+        return LlavaImageProcessor(hf_config, server_args, processor.image_processor)
 
 
 def get_dummy_image_processor():

python/sglang/srt/managers/schedule_batch.py

@@ -36,6 +36,7 @@ from typing import List, Optional, Tuple, Union
 import torch
 
 from sglang.global_config import global_config
+from sglang.srt.configs.model_config import ModelConfig
 from sglang.srt.constrained import RegexGuide
 from sglang.srt.constrained.jump_forward import JumpForwardMap
 from sglang.srt.mem_cache.base_prefix_cache import BasePrefixCache
@@ -121,11 +122,12 @@ class ImageInputs:
     """The image related inputs."""
 
     pixel_values: torch.Tensor
-    image_hash: int
+    image_hashes: Optional[list] = None
     image_sizes: Optional[list] = None
     image_offsets: Optional[list] = None
     pad_values: Optional[list] = None
     modalities: Optional[list] = None
+    num_image_tokens: Optional[int] = None
 
     image_embeds: Optional[List[torch.Tensor]] = None
     aspect_ratio_ids: Optional[List[torch.Tensor]] = None
@@ -138,19 +140,27 @@ class ImageInputs:
         # Use image hash as fake token_ids, which is then used for prefix matching
         ret = ImageInputs(
             pixel_values=obj["pixel_values"],
-            image_hash=hash(tuple(obj["image_hashes"])),
-            image_grid_thws=obj.get("image_grid_thws"),
+            image_hashes=hash(tuple(obj["image_hashes"])),
         )
-        image_hash = ret.image_hash
+        image_hash = ret.image_hashes
         ret.pad_values = [
             (image_hash) % vocab_size,
             (image_hash >> 16) % vocab_size,
             (image_hash >> 32) % vocab_size,
             (image_hash >> 64) % vocab_size,
         ]
-        ret.image_sizes = obj["image_sizes"]
-        # Only when pixel values is not None we have modalities
-        ret.modalities = obj["modalities"] or ["image"]
+
+        optional_args = [
+            "image_sizes",
+            "modalities",
+            "aspect_ratio_ids",
+            "aspect_ratio_mask",
+            "image_grid_thws",
+        ]
+        for arg in optional_args:
+            if arg in obj:
+                setattr(ret, arg, obj[arg])
+
         return ret
 
 
@@ -416,6 +426,10 @@ class ScheduleBatch:
     req_to_token_pool: ReqToTokenPool = None
     token_to_kv_pool: BaseTokenToKVPool = None
     tree_cache: BasePrefixCache = None
+
+    # For utility
+    model_config: ModelConfig = None
+
     forward_mode: ForwardMode = None
     sampling_info: SamplingBatchInfo = None
 
@@ -440,6 +454,12 @@ class ScheduleBatch:
     extend_num_tokens: int = None
     decoding_reqs: List[Req] = None
 
+    # For encoder-decoder
+    encoder_cached: Optional[List[bool]] = None
+    encoder_lens: Optional[torch.Tensor] = None
+    encoder_lens_cpu: Optional[List[int]] = None
+    encoder_out_cache_loc: Optional[torch.Tensor] = None
+
     # Stream
     has_stream: bool = False
 
@@ -450,12 +470,20 @@ class ScheduleBatch:
     device: str = "cuda"
 
     @classmethod
-    def init_new(cls, reqs, req_to_token_pool, token_to_kv_pool, tree_cache):
+    def init_new(
+        cls,
+        reqs,
+        req_to_token_pool,
+        token_to_kv_pool,
+        tree_cache,
+        model_config,
+    ):
         return cls(
             reqs=reqs,
             req_to_token_pool=req_to_token_pool,
             token_to_kv_pool=token_to_kv_pool,
             tree_cache=tree_cache,
+            model_config=model_config,
             return_logprob=any(req.return_logprob for req in reqs),
             has_stream=any(req.stream for req in reqs),
             has_regex=any(req.regex_fsm for req in reqs),
@@ -493,7 +521,78 @@ class ScheduleBatch:
 
         return out_cache_loc
 
-    def prepare_for_extend(self, vocab_size: int):
+    def prepare_encoder_info_extend(self, input_ids: List[int], seq_lens: List[int]):
+        self.encoder_lens_cpu = []
+        self.encoder_cached = []
+
+        for req in self.reqs:
+            im = req.image_inputs
+            if im is None or im.num_image_tokens is None:
+                # No image input
+                self.encoder_lens_cpu.append(0)
+                self.encoder_cached.append(True)
+            else:
+                self.encoder_lens_cpu.append(im.num_image_tokens)
+                self.encoder_cached.append(
+                    self.forward_mode.is_decode()
+                    or len(req.prefix_indices) >= im.num_image_tokens
+                )
+
+        self.encoder_lens = torch.tensor(self.encoder_lens_cpu, dtype=torch.int32).to(
+            self.device, non_blocking=True
+        )
+
+        # Strip encoder infos
+        pt = 0
+        decoder_out_cache_loc = []
+        encoder_out_cache_loc = []
+        for i, req in enumerate(self.reqs):
+            encoder_len = self.encoder_lens_cpu[i]
+            seq_lens[i] -= encoder_len
+
+            if len(req.prefix_indices) < encoder_len:
+                # NOTE: the encoder part should considered as a whole
+                assert len(req.prefix_indices) == 0
+                input_ids[i] = input_ids[i][encoder_len:]
+                encoder_out_cache_loc.append(self.out_cache_loc[pt : pt + encoder_len])
+                decoder_out_cache_loc.append(
+                    self.out_cache_loc[pt + encoder_len : pt + req.extend_input_len]
+                )
+                self.extend_lens[i] -= encoder_len
+                self.extend_num_tokens -= encoder_len
+            else:
+                decoder_out_cache_loc.append(
+                    self.out_cache_loc[pt : pt + req.extend_input_len]
+                )
+                self.prefix_lens[i] -= encoder_len
+
+            pt += req.extend_input_len
+
+        # Reassign
+        self.input_ids = torch.tensor(sum(input_ids, []), dtype=torch.int32).to(
+            self.device, non_blocking=True
+        )
+        self.seq_lens = torch.tensor(seq_lens, dtype=torch.int32).to(
+            self.device, non_blocking=True
+        )
+
+        if not decoder_out_cache_loc:
+            self.out_cache_loc = torch.empty(0, dtype=torch.int32).to(
+                self.device, non_blocking=True
+            )
+        else:
+            self.out_cache_loc = torch.cat(decoder_out_cache_loc)
+
+        if not encoder_out_cache_loc:
+            self.encoder_out_cache_loc = torch.empty(0, dtype=torch.int32).to(
+                self.device, non_blocking=True
+            )
+        else:
+            self.encoder_out_cache_loc = torch.cat(encoder_out_cache_loc)
+
+        assert len(self.out_cache_loc) == self.extend_num_tokens
+
+    def prepare_for_extend(self):
         self.forward_mode = ForwardMode.EXTEND
 
         bs = len(self.reqs)
@@ -561,8 +660,13 @@ class ScheduleBatch:
         self.extend_lens = [r.extend_input_len for r in reqs]
         self.extend_logprob_start_lens = [r.extend_logprob_start_len for r in reqs]
 
+        if self.model_config.is_encoder_decoder:
+            self.prepare_encoder_info_extend(input_ids, seq_lens)
+
         self.sampling_info = SamplingBatchInfo.from_schedule_batch(
-            self, vocab_size, global_server_args_dict["disable_penalizer"]
+            self,
+            self.model_config.vocab_size,
+            global_server_args_dict["disable_penalizer"],
         )
 
     def mix_with_running(self, running_batch: "ScheduleBatch"):
@@ -752,6 +856,10 @@ class ScheduleBatch:
 
         return jump_forward_reqs
 
+    def prepare_encoder_info_decode(self):
+        # Reset the encoder cached status
+        self.encoder_cached = [True] * len(self.reqs)
+
     def prepare_for_decode(self, enable_overlap: bool = False):
         self.forward_mode = ForwardMode.DECODE
 
@@ -766,16 +874,22 @@ class ScheduleBatch:
         bs = len(self.reqs)
         self.out_cache_loc = self.alloc_token_slots(bs)
 
+        if self.model_config.is_encoder_decoder:
+            locs = self.encoder_lens + self.seq_lens
+            self.prepare_encoder_info_decode()
+        else:
+            locs = self.seq_lens
+
         if enable_overlap:
             # Do not use in-place operations in the overlap mode
             self.req_to_token_pool.write(
-                (self.req_pool_indices, self.seq_lens), self.out_cache_loc
+                (self.req_pool_indices, locs), self.out_cache_loc
             )
             self.seq_lens = self.seq_lens + 1
         else:
             # A faster in-place version
             self.req_to_token_pool.write(
-                (self.req_pool_indices, self.seq_lens), self.out_cache_loc
+                (self.req_pool_indices, locs), self.out_cache_loc
             )
             self.seq_lens.add_(1)
         self.seq_lens_sum += bs
@@ -802,6 +916,10 @@ class ScheduleBatch:
             # No need to filter
             return
 
+        if self.model_config.is_encoder_decoder:
+            self.encoder_lens = self.encoder_lens[keep_indices]
+            self.encoder_lens_cpu = [self.encoder_lens_cpu[i] for i in keep_indices]
+
         self.reqs = [self.reqs[i] for i in keep_indices]
         new_indices = torch.tensor(keep_indices, dtype=torch.int32).to(
             self.device, non_blocking=True
@@ -828,6 +946,11 @@ class ScheduleBatch:
         # needs to be called with pre-merged Batch.reqs.
         self.sampling_info.merge_batch(other.sampling_info)
 
+        # Encoder-decoder infos
+        if self.model_config.is_encoder_decoder:
+            self.encoder_lens = torch.cat([self.encoder_lens, other.encoder_lens])
+            self.encoder_lens_cpu.extend(other.encoder_lens_cpu)
+
         self.req_pool_indices = torch.concat(
             [self.req_pool_indices, other.req_pool_indices]
         )
@@ -850,14 +973,11 @@ class ScheduleBatch:
 
     def get_model_worker_batch(self):
         if self.forward_mode.is_decode():
-            extend_seq_lens = extend_prefix_lens = extend_logprob_start_lens = (
-                image_inputs
-            ) = None
+            extend_seq_lens = extend_prefix_lens = extend_logprob_start_lens = None
         else:
             extend_seq_lens = self.extend_lens
             extend_prefix_lens = self.prefix_lens
             extend_logprob_start_lens = self.extend_logprob_start_lens
-            image_inputs = [r.image_inputs for r in self.reqs]
 
         if self.has_regex:
             self.sampling_info.regex_fsms = [req.regex_fsm for req in self.reqs]
@@ -887,7 +1007,11 @@ class ScheduleBatch:
             extend_seq_lens=extend_seq_lens,
             extend_prefix_lens=extend_prefix_lens,
             extend_logprob_start_lens=extend_logprob_start_lens,
-            image_inputs=image_inputs,
+            image_inputs=[r.image_inputs for r in self.reqs],
+            encoder_cached=self.encoder_cached,
+            encoder_lens=self.encoder_lens,
+            encoder_lens_cpu=self.encoder_lens_cpu,
+            encoder_out_cache_loc=self.encoder_out_cache_loc,
             lora_paths=[req.lora_path for req in self.reqs],
             sampling_info=self.sampling_info,
             mrope_positions_delta=mrope_positions_delta,
@@ -897,6 +1021,7 @@ class ScheduleBatch:
         # Only contain fields that will be used by process_batch_result
         return ScheduleBatch(
             reqs=self.reqs,
+            model_config=self.model_config,
             forward_mode=self.forward_mode,
             out_cache_loc=self.out_cache_loc,
             return_logprob=self.return_logprob,
@@ -944,6 +1069,12 @@ class ModelWorkerBatch:
     # For multimodal
     image_inputs: Optional[List[ImageInputs]]
 
+    # For encoder-decoder
+    encoder_cached: Optional[List[bool]]
+    encoder_lens: Optional[torch.Tensor]
+    encoder_lens_cpu: Optional[List[int]]
+    encoder_out_cache_loc: Optional[torch.Tensor]
+
     # For LoRA
     lora_paths: Optional[List[str]]
 

python/sglang/srt/managers/scheduler.py

@@ -662,8 +662,9 @@ class Scheduler:
             self.req_to_token_pool,
             self.token_to_kv_pool,
             self.tree_cache,
+            self.model_config,
         )
-        new_batch.prepare_for_extend(self.model_config.vocab_size)
+        new_batch.prepare_for_extend()
 
         # Mixed-style chunked prefill
         if self.is_mixed_chunk and self.running_batch is not None:

python/sglang/srt/managers/tokenizer_manager.py

@@ -122,7 +122,7 @@ class TokenizerManager:
 
                 # We want to parallelize the image pre-processing so we create an executor for it
                 self.image_processor = get_image_processor(
-                    self.hf_config, server_args, self.processor.image_processor
+                    self.hf_config, server_args, self.processor
                 )
             else:
                 self.tokenizer = get_tokenizer(
@@ -191,8 +191,10 @@ class TokenizerManager:
                 sampling_params = self._get_sampling_params(obj.sampling_params)
                 if self.is_generation:
                     image_inputs = await self.image_processor.process_images_async(
-                        obj.image_data, obj
+                        obj.image_data, input_text or input_ids, obj
                     )
+                    if image_inputs and "input_ids" in image_inputs:
+                        input_ids = image_inputs["input_ids"]
                     return_logprob = obj.return_logprob
                     logprob_start_len = obj.logprob_start_len
                     top_logprobs_num = obj.top_logprobs_num
@@ -217,8 +219,10 @@ class TokenizerManager:
                 sampling_params = self._get_sampling_params(obj.sampling_params[index])
                 if self.is_generation:
                     image_inputs = await self.image_processor.process_images_async(
-                        obj.image_data[index], obj
+                        obj.image_data[index], input_text or input_ids, obj
                     )
+                    if image_inputs and "input_ids" in image_inputs:
+                        input_ids = image_inputs["input_ids"]
                     return_logprob = obj.return_logprob[index]
                     logprob_start_len = obj.logprob_start_len[index]
                     top_logprobs_num = obj.top_logprobs_num[index]
@@ -263,8 +267,10 @@ class TokenizerManager:
             sampling_params = SamplingParams(**obj.sampling_params[0])
             sampling_params.max_new_tokens = 0
             image_inputs = await self.image_processor.process_images_async(
-                obj.image_data[0], obj
+                obj.image_data[0], input_text or input_ids, obj
             )
+            if image_inputs and "input_ids" in image_inputs:
+                input_ids = image_inputs["input_ids"]
             return_logprob = obj.return_logprob[0]
             logprob_start_len = obj.logprob_start_len[0]
             top_logprobs_num = obj.top_logprobs_num[0]

python/sglang/srt/mem_cache/memory_pool.py

@@ -26,6 +26,8 @@ from typing import List, Tuple, Union
 
 import torch
 
+from sglang.srt.layers.radix_attention import RadixAttention
+
 logger = logging.getLogger(__name__)
 
 
@@ -41,13 +43,17 @@ class ReqToTokenPool:
         )
         self.free_slots = list(range(size))
         self.write_records = []
+        self.use_records = use_records
 
-        if use_records:
-            # records all write operations
+        if self.use_records:
             self.write = self.write_with_records
         else:
             self.write = self.write_without_records
 
+    def write(self, indices, values):
+        # Keep the signature for type checking, will be initialized during runtime
+        raise NotImplementedError()
+
     def available_size(self):
         return len(self.free_slots)
 
@@ -154,7 +160,7 @@ class BaseTokenToKVPool:
 
     def set_kv_buffer(
         self,
-        layer_id: int,
+        layer: RadixAttention,
         loc: torch.Tensor,
         cache_k: torch.Tensor,
         cache_v: torch.Tensor,
@@ -209,11 +215,12 @@ class MHATokenToKVPool(BaseTokenToKVPool):
 
     def set_kv_buffer(
         self,
-        layer_id: int,
+        layer: RadixAttention,
         loc: torch.Tensor,
         cache_k: torch.Tensor,
         cache_v: torch.Tensor,
     ):
+        layer_id = layer.layer_id
         if cache_k.dtype != self.dtype:
             cache_k = cache_k.to(self.dtype)
         if cache_v.dtype != self.dtype:
@@ -265,11 +272,12 @@ class MLATokenToKVPool(BaseTokenToKVPool):
 
     def set_kv_buffer(
         self,
-        layer_id: int,
+        layer: RadixAttention,
         loc: torch.Tensor,
         cache_k: torch.Tensor,
         cache_v: torch.Tensor,
     ):
+        layer_id = layer.layer_id
         if cache_k.dtype != self.dtype:
             cache_k = cache_k.to(self.dtype)
         if self.store_dtype != self.dtype:
@@ -324,13 +332,14 @@ class DoubleSparseTokenToKVPool(BaseTokenToKVPool):
 
     def set_kv_buffer(
         self,
-        layer_id: int,
+        layer: RadixAttention,
         loc: torch.Tensor,
         cache_k: torch.Tensor,
         cache_v: torch.Tensor,
         cache_label: torch.Tensor,
     ):
         # NOTE(Andy): ignore the dtype check
+        layer_id = layer.layer_id
         self.k_buffer[layer_id][loc] = cache_k
         self.v_buffer[layer_id][loc] = cache_v
         self.label_buffer[layer_id][loc] = cache_label

python/sglang/srt/model_executor/cuda_graph_runner.py

@@ -105,6 +105,7 @@ class CudaGraphRunner:
         self.graph_memory_pool = None
         self.use_torch_compile = model_runner.server_args.enable_torch_compile
         self.disable_padding = model_runner.server_args.disable_cuda_graph_padding
+        self.is_encoder_decoder = self.model_runner.model_config.is_encoder_decoder
 
         # Batch sizes to capture
         if self.model_runner.server_args.disable_cuda_graph_padding:
@@ -132,6 +133,9 @@ class CudaGraphRunner:
             self.model_runner.attn_backend.get_cuda_graph_seq_len_fill_value()
         )
 
+        # FIXME(lsyin): leave it here for now, I don't know whether it is necessary
+        self.encoder_len_fill_value = 0
+
         if self.use_torch_compile:
             set_torch_compile_config()
 
@@ -144,9 +148,18 @@ class CudaGraphRunner:
             )
             self.out_cache_loc = torch.zeros((self.max_bs,), dtype=torch.int32)
 
+            if self.is_encoder_decoder:
+                # NOTE: encoder_lens can influence the full_text_row_masked_out_mask tensor when doing mixed batch
+                self.encoder_lens = torch.full(
+                    (self.max_bs,), self.encoder_len_fill_value, dtype=torch.int32
+                )
+            else:
+                self.encoder_lens = None
+
         # Capture
         try:
-            self.capture()
+            with self.model_capture_mode():
+                self.capture()
         except RuntimeError as e:
             raise Exception(
                 f"Capture cuda graph failed: {e}\n"
@@ -157,11 +170,32 @@ class CudaGraphRunner:
                 "Open an issue on GitHub https://github.com/sgl-project/sglang/issues/new/choose \n"
             )
 
-    def can_run(self, batch_size: int):
-        if self.disable_padding:
-            return batch_size in self.graphs
-        else:
-            return batch_size <= self.max_bs
+    @contextmanager
+    def model_capture_mode(self):
+        if hasattr(self.model_runner.model, "capture_mode"):
+            self.model_runner.model.capture_mode = True
+
+        yield
+
+        if hasattr(self.model_runner.model, "capture_mode"):
+            self.model_runner.model.capture_mode = False
+
+    def can_run(self, forward_batch: ForwardBatch):
+        is_bs_supported = (
+            forward_batch.batch_size in self.graphs
+            if self.disable_padding
+            else forward_batch.batch_size <= self.max_bs
+        )
+
+        # NOTE: cuda graph cannot handle mixed batch (encoder_len = 0)
+        # If mixed batch cannot be supported, then encoder_lens can be removed in cuda graph
+        # because the full_text_row_masked_out_mask tensor will always be ones
+        is_encoder_lens_supported = (
+            torch.all(forward_batch.encoder_lens > 0)
+            if self.is_encoder_decoder
+            else True
+        )
+        return is_bs_supported and is_encoder_lens_supported
 
     def capture(self):
         with graph_capture() as graph_capture_context:
@@ -188,11 +222,19 @@ class CudaGraphRunner:
         req_pool_indices = self.req_pool_indices[:bs]
         seq_lens = self.seq_lens[:bs]
         out_cache_loc = self.out_cache_loc[:bs]
+        if self.is_encoder_decoder:
+            encoder_lens = self.encoder_lens[:bs]
+        else:
+            encoder_lens = None
+
         seq_lens_sum = seq_lens.sum().item()
 
         # Attention backend
         self.model_runner.attn_backend.init_forward_metadata_capture_cuda_graph(
-            bs, req_pool_indices, seq_lens
+            bs,
+            req_pool_indices,
+            seq_lens,
+            encoder_lens,
         )
 
         # Run and capture
@@ -208,6 +250,7 @@ class CudaGraphRunner:
                 attn_backend=self.model_runner.attn_backend,
                 out_cache_loc=out_cache_loc,
                 seq_lens_sum=seq_lens_sum,
+                encoder_lens=encoder_lens,
                 return_logprob=False,
                 top_logprobs_nums=[0] * bs,
                 positions=torch.clamp((seq_lens - 1), min=0).to(torch.int64),
@@ -251,6 +294,8 @@ class CudaGraphRunner:
         self.req_pool_indices[:raw_bs].copy_(forward_batch.req_pool_indices)
         self.seq_lens[:raw_bs].copy_(forward_batch.seq_lens)
         self.out_cache_loc[:raw_bs].copy_(forward_batch.out_cache_loc)
+        if self.is_encoder_decoder:
+            self.encoder_lens[:raw_bs].copy_(forward_batch.encoder_lens)
 
         # Attention backend
         self.model_runner.attn_backend.init_forward_metadata_replay_cuda_graph(
@@ -258,6 +303,7 @@ class CudaGraphRunner:
             self.req_pool_indices,
             self.seq_lens,
             forward_batch.seq_lens_sum,
+            self.encoder_lens,
         )
 
         # Replay

python/sglang/srt/model_executor/forward_batch_info.py

@@ -108,6 +108,12 @@ class ForwardBatch:
     # For multimodal
     image_inputs: Optional[List[ImageInputs]] = None
 
+    # Encoder-decoder
+    encoder_cached: Optional[List[bool]] = None
+    encoder_lens: Optional[torch.Tensor] = None
+    encoder_lens_cpu: Optional[List[int]] = None
+    encoder_out_cache_loc: Optional[torch.Tensor] = None
+
     # For LoRA
     lora_paths: Optional[List[str]] = None
 
@@ -194,6 +200,11 @@ class ForwardBatch:
             req_pool_indices=batch.req_pool_indices,
             seq_lens=batch.seq_lens,
             out_cache_loc=batch.out_cache_loc,
+            image_inputs=batch.image_inputs,
+            encoder_cached=batch.encoder_cached,
+            encoder_lens=batch.encoder_lens,
+            encoder_lens_cpu=batch.encoder_lens_cpu,
+            encoder_out_cache_loc=batch.encoder_out_cache_loc,
             seq_lens_sum=batch.seq_lens_sum,
             return_logprob=batch.return_logprob,
             top_logprobs_nums=batch.top_logprobs_nums,
@@ -212,11 +223,11 @@ class ForwardBatch:
                 ],
                 axis=0,
             )
-            ret.image_inputs = batch.image_inputs
             ret.extend_num_tokens = batch.extend_num_tokens
             ret.extend_seq_lens = torch.tensor(
                 batch.extend_seq_lens, dtype=torch.int32
             ).to(device, non_blocking=True)
+
             ret.extend_prefix_lens = torch.tensor(
                 batch.extend_prefix_lens, dtype=torch.int32
             ).to(device, non_blocking=True)

python/sglang/srt/model_executor/model_runner.py

@@ -270,7 +270,6 @@ class ModelRunner:
             if hasattr(self.model, "get_attention_sliding_window_size")
             else None
         )
-        self.has_cross_attention = getattr(self.model, "has_cross_attention", False)
         self.is_generation = is_generation_model(
             self.model_config.hf_config.architectures, self.server_args.is_embedding
         )
@@ -510,7 +509,7 @@ class ModelRunner:
                 "Window attention is not supported in the triton attention backend. "
                 "Please use `--attention-backend flashinfer`."
             )
-            assert not self.has_cross_attention, (
+            assert not self.model_config.is_encoder_decoder, (
                 "Cross attention is not supported in the triton attention backend. "
                 "Please use `--attention-backend flashinfer`."
             )
@@ -558,9 +557,7 @@ class ModelRunner:
         self.cuda_graph_runner = CudaGraphRunner(self)
 
     def forward_decode(self, forward_batch: ForwardBatch):
-        if self.cuda_graph_runner and self.cuda_graph_runner.can_run(
-            forward_batch.batch_size
-        ):
+        if self.cuda_graph_runner and self.cuda_graph_runner.can_run(forward_batch):
             return self.cuda_graph_runner.replay(forward_batch)
 
         forward_batch.positions = (forward_batch.seq_lens - 1).to(torch.int64)

python/sglang/srt/models/qwen2_vl.py

@@ -605,7 +605,11 @@ class Qwen2VLForConditionalGeneration(nn.Module, SupportsMultiModal):
             ]
 
         positions = forward_batch.mrope_positions
-        if image_inputs is None or len(image_inputs) == 0:
+        if (
+            forward_batch.forward_mode.is_decode()
+            or image_inputs is None
+            or len(image_inputs) == 0
+        ):
             inputs_embeds = self.model.embed_tokens(input_ids)
         else:
             if getattr(self.config, "rope_scaling", {}).get("type", None) == "mrope":

python/sglang/srt/utils.py

@@ -209,6 +209,7 @@ def is_multimodal_model(model_architectures):
         or "LlavaQwenForCausalLM" in model_architectures
         or "LlavaMistralForCausalLM" in model_architectures
         or "LlavaVidForCausalLM" in model_architectures
+        or "MllamaForConditionalGeneration" in model_architectures
         or "Qwen2VLForConditionalGeneration" in model_architectures
     ):
         return True