add magi-compiler support to qwen_image

configs/neopp/neopp_dense_fp8.json

@@ -7,6 +7,7 @@
     "timestep_shift": 3.0,
     "cfg_interval": [-1, 2],
     "enable_cfg": true,
+    "use_magi_compile": true,
     "dit_quantized": true,
     "dit_quant_scheme": "fp8-sgl"
 }

configs/qwen_image/qwen_image_i2i_2511.json

@@ -5,6 +5,7 @@
     "resize_mode": "adaptive",
     "attn_type": "flash_attn3",
     "enable_cfg": true,
+    "use_magi_compile": true,
     "sample_guide_scale": 4.0,
     "CONDITION_IMAGE_SIZE": 147456,
     "USE_IMAGE_ID_IN_PROMPT": true

lightx2v/common/magi_custom_op_mode.py

@@ -0,0 +1,12 @@
+"""Global switch: use magi subgraph-boundary custom ops only when MAGI compile is active."""
+
+_use_magi_custom_ops = False
+
+
+def set_magi_custom_op_mode(enabled: bool) -> None:
+    global _use_magi_custom_ops
+    _use_magi_custom_ops = bool(enabled)
+
+
+def use_magi_custom_ops() -> bool:
+    return _use_magi_custom_ops

lightx2v/common/ops/norm/layer_norm_weight.py

@@ -10,6 +10,13 @@
 
 from .triton_ops import norm_infer
 
+try:
+    from magi_compiler import magi_register_custom_op
+except ImportError:
+    magi_register_custom_op = None
+
+from lightx2v.common.magi_custom_op_mode import use_magi_custom_ops
+
 
 class LNWeightTemplate(metaclass=ABCMeta):
     def __init__(
@@ -262,10 +269,8 @@ def __init__(
         )
 
     def apply(self, input_tensor):
-        output_tensor = norm_infer(
-            input_tensor,
-            (self._get_actual_weight()),
-            self._get_actual_bias(),
-            self.eps,
-        )
-        return output_tensor
+        w = self._get_actual_weight()
+        b = self._get_actual_bias()
+        if use_magi_custom_ops() and magi_register_custom_op is not None:
+            return torch.ops.lightx2v.triton_layer_norm(input_tensor, w, b, self.eps)
+        return norm_infer(input_tensor, w, b, self.eps)

lightx2v/common/ops/norm/rms_norm_weight.py

@@ -16,6 +16,13 @@
 except ImportError:
     sgl_kernel = None
 
+try:
+    from magi_compiler import magi_register_custom_op
+except ImportError:
+    magi_register_custom_op = None
+
+from lightx2v.common.magi_custom_op_mode import use_magi_custom_ops
+
 
 class RMSWeightTemplate(metaclass=ABCMeta):
     def __init__(
@@ -414,7 +421,10 @@ def __init__(
         )
 
     def apply(self, input_tensor):
-        return rms_norm_kernel(input_tensor, (self._get_actual_weight()), self.eps)
+        w = self._get_actual_weight()
+        if use_magi_custom_ops() and magi_register_custom_op is not None:
+            return torch.ops.lightx2v.rms_norm(input_tensor, w, self.eps)
+        return rms_norm_kernel(input_tensor, w, self.eps)
 
 
 class RMSWeightFusedQKNorm3DRope:

lightx2v/common/ops/norm/triton_ops.py

@@ -8,6 +8,11 @@
 import triton.language as tl  # type: ignore
 from torch import Tensor
 
+try:
+    from magi_compiler import magi_register_custom_op
+except ImportError:
+    magi_register_custom_op = None
+
 
 @triton.autotune(
     configs=[
@@ -861,6 +866,25 @@ def norm_infer(
     return out
 
 
+if magi_register_custom_op is not None:
+
+    @magi_register_custom_op(
+        "lightx2v::triton_layer_norm",
+        infer_output_meta_fn=["x"],
+        is_subgraph_boundary=True,
+    )
+    def _triton_layer_norm_custom_op(x: torch.Tensor, weight: torch.Tensor, bias: torch.Tensor, eps: float) -> torch.Tensor:
+        return norm_infer(x, weight, bias, eps, is_rms_norm=False)
+
+    @magi_register_custom_op(
+        "lightx2v::rms_norm",
+        infer_output_meta_fn=["x"],
+        is_subgraph_boundary=True,
+    )
+    def _rms_norm_custom_op(x: torch.Tensor, weight: torch.Tensor, eps: float) -> torch.Tensor:
+        return rms_norm_kernel(x, weight, eps)
+
+
 def rms_norm_fn(
     x,
     weight,

lightx2v/models/networks/neopp/infer/transformer_infer.py

@@ -1,5 +1,6 @@
 import torch
 import torch.nn.functional as F
+from loguru import logger
 
 # from flashinfer.activation import silu_and_mul as flashinfer_silu_and_mul
 try:
@@ -9,9 +10,11 @@
 
 try:
     from magi_compiler import magi_compile, magi_register_custom_op
+    from magi_compiler.config import CudaGraphMode
 except ImportError:
     magi_compile = None
     magi_register_custom_op = None
+    CudaGraphMode = None
 
 from lightx2v.common.transformer_infer.transformer_infer import BaseTransformerInfer
 from lightx2v.models.networks.neopp.infer.kv_cache_manager import KVCacheManager
@@ -83,6 +86,14 @@ def __init__(self, config):
             self.seq_p_group = None
         self.kv_cache = KVCacheManager()
 
+        # MagiCompiler enable/disable switch
+        self.use_magi_compile = config.get("use_magi_compile", False)
+        if self.use_magi_compile and magi_compile is None:
+            logger.warning("use_magi_compile=True but magi_compiler is not available, using eager mode")
+            self.use_magi_compile = False
+        if self.use_magi_compile:
+            logger.info("Using Magi Compile (per-layer decoder, split at kv_update)")
+
     @torch.no_grad()
     def infer(self, weights, pre_infer_out, inputs):
         pass_key = "cond" if self.scheduler.infer_condition else "uncond"
@@ -96,7 +107,7 @@ def infer(self, weights, pre_infer_out, inputs):
         hidden_states = self._fm_head(weights.fm_head, hidden_states)
         return hidden_states.unsqueeze(0)
 
-    def _infer_without_offload_impl(self, blocks, hidden_states, cos_sin, past_key_values):
+    def infer_without_offload(self, blocks, hidden_states, cos_sin, past_key_values):
         seq_len_q = hidden_states.shape[0]
         kvcache_len = past_key_values.shape[2]
         seq_len_k = kvcache_len + seq_len_q
@@ -106,40 +117,43 @@ def _infer_without_offload_impl(self, blocks, hidden_states, cos_sin, past_key_v
         self.kv_cache.clear()
         self.kv_cache.prepare(past_key_values, seq_len_q)
 
-        self._cu_seqlens_q = torch.tensor([0, seq_len_q], dtype=torch.int32)
-        self._cu_seqlens_k = torch.tensor([0, seq_len_k], dtype=torch.int32)
-        self._max_seqlen_q = seq_len_q
-        self._max_seqlen_k = seq_len_k
-        self._kvcache_len = kvcache_len
-
+        kv_buf = self.kv_cache._kv_buf
         for layer_idx, block_weight in enumerate(blocks):
-            hidden_states = self._decoder_layer(block_weight, layer_idx, hidden_states, cos_sin)
+            if self.use_magi_compile:
+                hidden_states = self._decoder_layer_magi(block_weight, layer_idx, hidden_states, cos_sin, kv_buf)
+            else:
+                hidden_states = self._decoder_layer(block_weight, layer_idx, hidden_states, cos_sin, kv_buf)
         return hidden_states
 
     if magi_compile is not None:
+        import torch._dynamo as _dynamo
 
-        @magi_compile(
-            dynamic_arg_dims={"hidden_states": 0, "past_key_values": 2},
-            config_patch=lambda c: c.model_copy(
+        _dynamo.config.capture_scalar_outputs = False
+        _dynamo.config.specialize_int = False
+        _dynamo.config.automatic_dynamic_shapes = True
+
+        def _magi_config_patch(c):
+            return c.model_copy(
                 update={
                     "enable_inductor_max_autotune": True,
-                    "disable_cache": True,  # Avoid pickle errors with custom op registrations
+                    "disable_cache": True,
+                    "cudagraph_mode": CudaGraphMode.NONE,
                 }
-            ),
-        )
-        def infer_without_offload(self, blocks, hidden_states, cos_sin, past_key_values):
-            return self._infer_without_offload_impl(blocks, hidden_states, cos_sin, past_key_values)
-    else:
+            )
 
-        def infer_without_offload(self, blocks, hidden_states, cos_sin, past_key_values):
-            return self._infer_without_offload_impl(blocks, hidden_states, cos_sin, past_key_values)
+        @magi_compile(
+            dynamic_arg_dims={"hidden_states": 0, "kv_buf": 2},
+            config_patch=_magi_config_patch,
+        )
+        def _decoder_layer_magi(self, block_weight, layer_idx, hidden_states, cos_sin, kv_buf):
+            return self._decoder_layer(block_weight, layer_idx, hidden_states, cos_sin, kv_buf)
 
     # @ProfilingContext4DebugL1("Decoder Layer")
-    def _decoder_layer(self, block_weight, layer_idx, hidden_states, cos_sin):
+    def _decoder_layer(self, block_weight, layer_idx, hidden_states, cos_sin, kv_buf=None):
         residual = hidden_states
         hidden_states = block_weight.input_layernorm_mot_gen.apply(hidden_states)
 
-        hidden_states = self._self_attn(block_weight.self_attn, layer_idx, hidden_states, cos_sin)
+        hidden_states = self._self_attn(block_weight.self_attn, layer_idx, hidden_states, cos_sin, kv_buf)
         hidden_states = residual + hidden_states
 
         residual = hidden_states
@@ -150,7 +164,7 @@ def _decoder_layer(self, block_weight, layer_idx, hidden_states, cos_sin):
         return hidden_states
 
     # @ProfilingContext4DebugL1("Self Attn")
-    def _self_attn(self, attn_w, layer_idx, hidden_states, cos_sin):
+    def _self_attn(self, attn_w, layer_idx, hidden_states, cos_sin, kv_buf=None):
         query_states = attn_w.q_proj_mot_gen.apply(hidden_states)
         query_states = query_states.view(-1, self.num_heads, self.head_dim)  # [seq, num_heads, head_dim]
 
@@ -167,9 +181,12 @@ def _self_attn(self, attn_w, layer_idx, hidden_states, cos_sin):
         value_states = attn_w.v_proj_mot_gen.apply(hidden_states)
         value_states = value_states.view(-1, self.num_kv_heads, self.head_dim)  # [seq, num_kv_heads, head_dim]
 
+        if kv_buf is None:
+            kv_buf = self.kv_cache._kv_buf
+
         # Custom op: forces MagiCompiler to split the FX graph at this op,
         # isolating the slice-scatter from the surrounding compiled regions.
-        key_states, value_states = torch.ops.neopp.kv_update(self.kv_cache._kv_buf, layer_idx, key_states, value_states)
+        key_states, value_states = torch.ops.neopp.kv_update(kv_buf, layer_idx, key_states, value_states)
 
         attn_output = self._compute_attn(attn_w, query_states, key_states, value_states)
 
@@ -254,10 +271,10 @@ def _compute_attn(self, attn_w, query_states, key_states, value_states):
                 q=query_states,
                 k=key_states,
                 v=value_states,
-                cu_seqlens_q=self._cu_seqlens_q,
-                cu_seqlens_kv=self._cu_seqlens_k,
-                max_seqlen_q=self._max_seqlen_q,
-                max_seqlen_kv=self._max_seqlen_k,
+                cu_seqlens_q=torch.tensor([0, seq_len_q], dtype=torch.int32),
+                cu_seqlens_kv=torch.tensor([0, seq_len_k], dtype=torch.int32),
+                max_seqlen_q=seq_len_q,
+                max_seqlen_kv=seq_len_k,
             )
         return attn_output