feat(CRITICAL): 从 GitHub 扫描搬运 ixformer SDK + xllm 完整 GDN/MoE 代码

来源:
  1. Chranos/ixformer (GitHub) → ixformer_sdk/ (230 files, 70K lines)
     - inference/functions/vllm.py: vllm_moe_topk_softmax 完整实现 (2033 lines)
     - inference/functions/moe.py: MoE ops 完整实现 (1380 lines)
     - contrib/vllm_flash_attn/: FA2 Python 接口 (1018 lines)
     - contrib/tgi/fused_moe.py: TGI fused MoE (429 lines)
     - csrc/include/ixformer/: C++ kernel headers + cmake

  2. Deep-Spark/xllm (GitHub) → upstream_ref/xllm_latest/ (+15 files)
     - npu_torch/qwen3_5_decoder_layer_impl.cpp/.h
     - npu_torch/qwen3_5_gated_delta_net.cpp/.h
     - npu_torch/qwen3_next_*.cpp/.h (6 files)
     - npu_torch/attention.cpp/.h + fused_moe.cpp/.h + CMakeLists.txt
     - models/llm/qwen3_5.h + qwen3_5_mtp.h + qwen3_next.h
     - models/vlm/qwen3_5.h

调用链完整性:
  ixformer_sdk/inference/functions/vllm.py
    → ops.infer.moe_topk_softmax() (C++ 层)
    → 这就是 base 镜像 libixformer.so 里的实现

  upstream_ref/xllm_latest/core/layers/ilu/fused_moe.cpp
    → ixformer::infer::topk_softmax() (直接 C++ 调用)
    → ixformer::infer::group_gemm() → 完整 7-step MoE pipeline

ixformer_sdk/csrc/include/ixformer/comm/ccl.h

@@ -0,0 +1,357 @@
+#pragma once
+
+#include "core/op_algo.h"
+#include "nccl.h"
+
+namespace ixformer::comm {
+
+const uint8_t MAX_TENSOR_NDIM = 8;
+constexpr size_t DEFAULT_SHM_SIZE = 16 * 1024 * 1024 * sizeof(float);
+
+struct Comm;
+typedef Comm *Comm_t;
+
+
+struct TensorDesc {
+    void *data_ptr;
+    ncclDataType_t dtype;
+    uint64_t numel;
+    uint8_t ndim;
+    int64_t shape[MAX_TENSOR_NDIM];
+    int64_t stride[MAX_TENSOR_NDIM];
+    bool contiguous;
+};
+
+
+/**
+ * @brief Generate unique communicator id.
+ *
+ * Generates an Id to be used in ncclCommInitRank. ncclGetUniqueId should be
+ * called once and the Id should be distributed to all ranks in the
+ * communicator before calling ncclCommInitRank.
+ *
+ * @param commId: the unique id of communicator, it is created in main rank, and broadcast other rank.
+ */
+void getUniqueId(ncclUniqueId *commId);
+
+/**
+ * @brief Serialize commId to string.
+ * @param commId: the unique id of communicator.
+ * @return: serialized string.
+ */
+std::string serializeUniqueId(const ncclUniqueId &commId);
+
+/**
+ * @brief Deserialize the string of commId.
+ * @param commIdStr: serialized string by serializeUniqueId.
+ * @param commId: output commId
+ */
+void deserializeUniqueId(const std::string &commIdStr, ncclUniqueId *commId);
+
+/**
+ * @brief Creates a new communicator (multi process version).
+ *
+ * Rank must be between 0 and nranks-1 and unique within a communicator clique.
+ * Each rank is associated to a CUDA device, which has to be set before calling ncclCommInitRank.
+ *
+ * It is important to ensure that the current process's CUDA device is set by cudaSetDevice before calling this function,
+ * otherwise, an exception will be thrown.
+ *
+ * @param comm: Communicator
+ * @param nranks: the number of ranks.
+ * @param commId: the unique id of communicator.
+ * @param rank: the rank of current process
+ * @param shm_size: Unlike NCCL, IxFormer communication relies on CUDA IPC for communication by shared memory.
+ *        If the shm_size is not provided, it will use the default value: DEFAULT_SHM_SIZE.
+ * @throw CommError: Throw CommError when an error is encountered.
+ */
+void initRank(Comm_t *comm, int nranks, ncclUniqueId commId, int rank, size_t shm_size = DEFAULT_SHM_SIZE);
+
+/**
+ * @brief Finalize a communicator.
+ *
+ * ncclCommFinalize flushes all issued communications,
+ * and marks communicator state as ncclInProgress. The state will change to ncclSuccess
+ * when the communicator is globally quiescent and related resources are freed; then,
+ * calling ncclCommDestroy can locally free the rest of the resources (e.g. communicator
+ * itself) without blocking.
+ *
+ * @param comm: Communicator
+ * @throw CommError: Throw CommError when an error is encountered.
+ */
+void destroy(Comm_t comm);
+
+void delete_comm_resuouces(Comm_t comm);
+
+/**
+ * @brief Whether is initiated.
+ * @param comm: Communicator
+ */
+bool isInitiated(Comm_t comm);
+
+/**
+ * @brief Gets ncclComm_t.
+ * @param comm: Communicator
+ */
+ncclComm_t getNcclComm(Comm_t comm);
+
+/**
+ * @brief Gets the number of ranks in the communicator clique
+ * @param comm: Communicator
+ */
+int getWorldSize(Comm_t comm);
+
+/**
+ * @brief Gets the number of nodes in the communicator clique
+ * @param comm: Communicator
+ */
+int getNumNodes(Comm_t comm);
+
+/**
+ * @brief Returns the user-ordered "rank" associated with the communicator.
+ * @param comm: Communicator
+ */
+int getRank(Comm_t comm);
+
+/**
+ * @brief Returns the cuda device number associated with the communicator.
+ * @param comm: Communicator
+ */
+int getDevice(Comm_t comm);
+
+/**
+ * @brief Gets shared memory size in the communicator clique
+ * @param comm: Communicator
+ */
+uint64_t getIpcShmSize(Comm_t comm);
+
+
+// ============================================================================
+// Collective communication operations
+//
+// Collective communication operations must be called separately for each
+// communicator in a communicator clique.
+//
+// They return when operations have been enqueued on the CUDA stream.
+//
+// Since they may perform inter-CPU synchronization, each call has to be done
+// from a different thread or process, or need to use Group Semantics (see
+// below).
+// ============================================================================
+
+/**
+ * @brief Barrier the member of the communicator
+ * @param comm: Communicator
+ * @param stream: CUDA Stream
+ */
+void barrier(Comm_t comm, cudaStream_t stream);
+
+/**
+ * @brief All-Gather
+ *
+ * Each device gathers sendcount values from other GPUs into senddata,
+ * receiving data from rank i at offset i*sendcount.
+ * Assumes recvcount is equal to nranks*sendcount, which means that recvdata
+ * should have a size of at least nranks*sendcount elements.
+ *
+ * In-place operations will happen if senddata == recvdata + rank * sendcount.
+ *
+ * @param comm: Communicator
+ * @param senddata: send data
+ * @param recvdata: recv data
+ * @param sendcount: the number of send elements, it is not nbytes.
+ * @param dtype: data type
+ * @param stream: CUDA Stream
+ * @param algo: Algorithm
+ * @throw CommError: Throw CommError when an error is encountered.
+ */
+void allGather(Comm_t comm, const void *senddata, void *recvdata, size_t sendcount, ncclDataType_t dtype,
+               cudaStream_t stream, AllGatherAlgo algo = AllGatherAlgo::kNone);
+
+/**
+ * @brief All-Reduce
+ *
+ * Reduces data arrays of length count in senddata using op operation, and
+ * leaves identical copies of result on each recvdata.
+ *
+ * In-place operation will happen if senddata == recvdata.
+ *
+ * @param comm: Communicator
+ * @param senddata: send data
+ * @param recvdata: recv data
+ * @param count: the number of elements, it is not nbytes.
+ * @param dtype: data type
+ * @param op：Reduce type: ncclSum, ncclProd, ncclMin, ncclMax, ncclAvg
+ * @param stream: CUDA Stream
+ * @param algo: Algorithm
+ * @throw CommError: Throw CommError when an error is encountered.
+ */
+void allReduce(Comm_t comm, const void *senddata, void *recvdata, size_t count, ncclDataType_t dtype,
+               ncclRedOp_t op, cudaStream_t stream, AllReduceAlgo algo = AllReduceAlgo::kNone);
+
+/**
+ * @brief Whether is supported non-contiguous tensors
+ * @param comm: Communicator
+ * @param dtype: data type
+ * @param shape: tensor shape
+ * @param ndim: the ndim of tensor
+ * @param numel: the number of tensor
+ * @param op: Reduce type: ncclSum, ncclProd, ncclMin, ncclMax, ncclAvg
+ * @return: supported
+ */
+bool allReduceStrideSupported(Comm_t comm, ncclDataType_t dtype, const int64_t *shape, int ndim, uint64_t numel, ncclRedOp_t op);
+
+/**
+ * @brief All-Reduce for non-contiguous tensors
+ * @param comm: Communicator
+ * @param senddata: send tensor
+ * @param recvdata: recv tensor
+ * @param stream: CUDA Stream
+ */
+void allReduceStride(Comm_t comm, const TensorDesc &senddata, TensorDesc &recvdata, cudaStream_t stream);
+
+/**
+ * @brief Send data from senddata to rank peer.
+ *
+ * Rank peer needs to call ncclRecv with the same datatype and the same count from this
+ * rank. This operation is blocking for the GPU. If multiple ncclSend and ncclRecv operations
+ * need to progress concurrently to complete.
+ *
+ * @param comm: Communicator
+ * @param senddata: send data
+ * @param count: the number of send elements, it is not nbytes.
+ * @param dtype: data type
+ * @param peer: the destination rank
+ * @param stream: CUDA Stream
+ * @param algo: Algorithm
+ * @throw CommError: Throw CommError when an error is encountered.
+ */
+void send(Comm_t comm, const void *senddata, size_t count, ncclDataType_t dtype, int peer, cudaStream_t stream,
+          SendAlgo algo = SendAlgo::kNone);
+
+/**
+ * @brief Receive data from rank peer into recvdata.
+ *
+ * Rank peer needs to call ncclSend with the same datatype and the same count to this
+ * rank. This operation is blocking for the GPU. If multiple ncclSend and ncclRecv operations
+ * need to progress concurrently to complete.
+ *
+ * @param comm: Communicator
+ * @param recvdata: recv data
+ * @param count: the number of recv elements, it is not nbytes.
+ * @param dtype: data type
+ * @param peer: source rank
+ * @param stream: CUDA Stream
+ * @param algo: Algorithm
+ * @throw CommError: Throw CommError when an error is encountered.
+ */
+void recv(Comm_t comm, void *recvdata, size_t count, ncclDataType_t dtype, int peer, cudaStream_t stream,
+          RecvAlgo algo = RecvAlgo::kNone);
+
+/**
+ * @brief Reduces data arrays of length count in senddata into recvdata using op operation.
+ *
+ * Recvdata may be NULL on all calls except for root device.
+ * root is the rank (not the CUDA device) where data will reside after the
+ * operation is complete.
+ *
+ * In-place operation will happen if senddata == recvdata.
+ *
+ * @param comm: Communicator
+ * @param senddata: send data
+ * @param recvdata: recv data
+ * @param count:  the number of elements, it is not nbytes.
+ * @param dtype: data type
+ * @param op: Reduce type: ncclSum, ncclProd, ncclMin, ncclMax, ncclAvg
+ * @param root: root rank
+ * @param stream: CUDA Stream
+ * @param algo: Algorithm
+ * @throw CommError: Throw CommError when an error is encountered.
+ */
+void reduce(Comm_t comm, const void *senddata, void *recvdata, size_t count, ncclDataType_t dtype, ncclRedOp_t op,
+            int root, cudaStream_t stream, ReduceAlgo algo = ReduceAlgo::kNone);
+
+/**
+ * @brief Broadcast
+ *
+ * Copies count values from root to all other devices.
+ * root is the rank (not the CUDA device) where data resides before the
+ * operation is started.
+ *
+ * In-place operation will happen if senddata == recvdata.
+ *
+ * @param comm: Communicator
+ * @param senddata: send data
+ * @param recvdata: recv data
+ * @param count: the number of elements, it is not nbytes.
+ * @param dtype: data type
+ * @param root: root rank
+ * @param stream: CUDA Stream
+ * @param algo: Algorithm
+ * @throw CommError: Throw CommError when an error is encountered.
+ */
+void broadcast(Comm_t comm, const void *senddata, void *recvdata, size_t count, ncclDataType_t dtype, int root,
+               cudaStream_t stream, BroadcastAlgo algo = BroadcastAlgo::kNone);
+
+/**
+ *
+ * @brief Reduce-Scatter
+ *
+ * Reduces data in senddata using op operation and leaves reduced result
+ * scattered over the devices so that recvdata on rank i will contain the i-th
+ * block of the result.
+ * Assumes sendcount is equal to nranks*recvcount, which means that senddata
+ * should have a size of at least nranks*recvcount elements.
+ *
+ * In-place operations will happen if recvdata == senddata + rank * recvcount.
+ *
+ * @param comm: Communicator
+ * @param senddata: send data
+ * @param recvdata: recv data
+ * @param recvcount: the number of recv elements, it is not nbytes.
+ * @param dtype: data type
+ * @param op：Reduce type: ncclSum, ncclProd, ncclMin, ncclMax, ncclAvg
+ * @param stream: CUDA Stream
+ * @param algo: Algorithm
+ * @throw CommError: Throw CommError when an error is encountered.
+ */
+void reduceScatter(Comm_t comm, const void *senddata, void *recvdata,
+                   size_t recvcount, ncclDataType_t dtype, ncclRedOp_t op, cudaStream_t stream,
+                   ReduceScatterAlgo algo = ReduceScatterAlgo::kNone);
+
+/**
+ * @brief Send data from src_rank to dst_rank on src_rank process, recv data on dst_rank.
+ *
+ * @param comm: Communicator
+ * @param data: send data to dst rank if current rank is src_rank, recv data if current rank is dst_rank.
+ * @param count: the number of send/recv elements, it is not nbytes.
+ * @param dtype: data type
+ * @param src_rank: src rank
+ * @param dst_rank: dst rank
+ * @param stream: CUDA Stream
+ * @param algo: Algorithm
+ * @throw CommError: Throw CommError when an error is encountered.
+ */
+void p2p(Comm_t comm, void *data, size_t count, ncclDataType_t dtype, int src_rank, int dst_rank, cudaStream_t stream,
+         SendAlgo algo = SendAlgo::kNone);
+
+/**
+ * @brief The all ranks of communicator send senddata to dst_rank.
+ *
+ * @param comm: Communicator
+ * @param senddata: send data
+ * @param recvdatas: recv datas，it is two-dim array, shape: [WorldSize, RecvDataPointer],
+ *        the first dim is host pointer，the second dim is GPU pointer,
+ *        it can be nullptr when current rank is not dst rank.
+ * @param sendcount: the number of send elements, it is not nbytes.
+ * @param dst_rank: dst rank
+ * @param dtype: data type
+ * @param stream: CUDA Stream
+ * @param algo: Algorithm
+ * @throw CommError: Throw CommError when an error is encountered.
+ */
+void gather(Comm_t comm, const void *senddata, void **recvdatas, size_t sendcount, int dst_rank, ncclDataType_t dtype,
+            cudaStream_t stream, GatherAlgo algo = GatherAlgo::kNone);
+
+
+}// namespace ixformer::comm

ixformer_sdk/csrc/include/ixformer/comm/core/error.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <stdexcept>
+#include "status.h"
+
+namespace ixformer::comm {
+
+class CommError : public std::runtime_error {
+public:
+    template<class ERROR_STR>
+    CommError(CommStatus error, const ERROR_STR str) : error_{error}, std::runtime_error(str) {}
+
+    CommStatus status() {
+        return error_;
+    }
+
+private:
+    CommStatus error_;
+};
+
+}// namespace ixformer::comm

ixformer_sdk/csrc/include/ixformer/comm/core/op_algo.h

@@ -0,0 +1,80 @@
+#pragma once
+
+#include <string>
+
+namespace ixformer::comm {
+
+enum class AllGatherAlgo {
+    kNone,
+    kAuto,
+    kNCCL,
+    kNumAlgo
+};
+
+enum class AllReduceAlgo {
+    kNone,          // None
+    kAuto,          // 自动选择算法
+    kAllGatherSum,  // 针对小数据量的算法
+    kBroadcastSum,  // 针对小数据量的算法
+    kRing,          // Ring AllReduce
+    kQuant,         // 对通讯算法进行量化，默认使用 kQuantL1
+    kQuantL1,       // 对通讯算法进行量化，优先使用量化算法以及最大保留精度，在部分 Size 性能不佳时，退化为 Auto 算法
+    kQuantL2,       // 对通讯算法进行量化，优先使用量化算法以及最大化速度，在部分 Size 性能不佳时，退化为 Auto 算法
+    kQuantL1AllSize,// 对所有的 Size 都使用量化算法
+    kQuantL2AllSize,// 对所有的 Size 都使用量化算法
+    kNCCL,          // 使用 NCCL
+    kStride,        // 输入或输出的 Tensor 不是连续的
+    kNumAlgo
+};
+
+
+enum class BroadcastAlgo {
+    kNone,
+    kAuto,
+    kNCCL,
+    kNumAlgo
+};
+
+enum class GatherAlgo {
+    kNone,
+    kAuto,
+    kNCCL,
+    kNumAlgo
+};
+
+enum class SendAlgo {
+    kNone,
+    kAuto,
+    kNCCL,
+    kNumAlgo
+};
+
+typedef SendAlgo RecvAlgo;
+
+enum class ReduceAlgo {
+    kNone,
+    kAuto,
+    kNCCL,
+    kNumAlgo
+};
+
+enum class ReduceScatterAlgo {
+    kNone,
+    kAuto,
+    kNCCL,
+    kNumAlgo
+};
+
+
+std::string to_string(AllGatherAlgo algo);
+std::string to_string(AllReduceAlgo algo);
+std::string to_string(BroadcastAlgo algo);
+std::string to_string(GatherAlgo algo);
+std::string to_string(SendAlgo algo);
+std::string to_string(ReduceAlgo algo);
+std::string to_string(ReduceScatterAlgo algo);
+
+template<typename Algo>
+Algo get_algo_from_str(const std::string &name);
+
+}// namespace ixformer::comm

ixformer_sdk/csrc/include/ixformer/comm/core/status.h

@@ -0,0 +1,22 @@
+#pragma once
+#include "comm/core/common.h"
+
+
+namespace ixformer::comm {
+
+enum CommStatus {
+    commSuccess,
+    commFail,
+    commCudaError,
+    commNcclError,
+    commInvalidArgument,
+    commUnsupported,
+    commInternalError,
+    commInvalidComm// maybe comm is nullptr
+};
+
+
+std::string to_string(CommStatus status);
+
+
+}// namespace ixformer::comm