[Feature][KVCache] Implement Cache Manager V1 with GPU + CPU Cache Support (1/n)

custom_ops/gpu_ops/swap_cache_batch.cu

@@ -127,7 +127,6 @@ void SwapCacheAllLayers(
     const std::vector<int64_t>& swap_block_ids_cpu,
     int rank,
     int mode) {
-  checkCudaErrors(cudaSetDevice(rank));  // used for distributed launch
   assert(cache_gpu_tensors.size() > 0 &&
          cache_gpu_tensors.size() == cache_cpu_ptrs.size());
   switch (cache_gpu_tensors[0].dtype()) {

custom_ops/setup_ops.py

@@ -315,6 +315,7 @@ def find_end_files(directory, end_str):
         "gpu_ops/swap_cache_batch.cu",
         "gpu_ops/swap_cache.cu",
         "gpu_ops/swap_cache_layout.cu",
+        "gpu_ops/swap_cache_optimized.cu",  # 新增：优化的 KV cache 换入算子
         "gpu_ops/step_system_cache.cu",
         "gpu_ops/cpp_extensions.cc",
         "gpu_ops/share_external_data.cu",

fastdeploy/cache_manager/ops.py

@@ -23,6 +23,12 @@
 
 try:
     if current_platform.is_cuda():
+        from fastdeploy.model_executor.ops.gpu import (
+            swap_cache_per_layer,  # 单层 KV cache 换入算子（同步）
+        )
+        from fastdeploy.model_executor.ops.gpu import (
+            swap_cache_per_layer_async,  # 单层 KV cache 换入算子（异步，无强制 sync）
+        )
         from fastdeploy.model_executor.ops.gpu import (
             cuda_host_alloc,
             cuda_host_free,
@@ -43,6 +49,12 @@ def get_peer_mem_addr(*args, **kwargs):
             raise RuntimeError("CUDA no need of get_peer_mem_addr!")
 
     elif current_platform.is_maca():
+        from fastdeploy.model_executor.ops.gpu import (
+            swap_cache_per_layer,  # 单层 KV cache 换入算子（同步）
+        )
+        from fastdeploy.model_executor.ops.gpu import (
+            swap_cache_per_layer_async,  # 单层 KV cache 换入算子（异步，无强制 sync）
+        )
         from fastdeploy.model_executor.ops.gpu import (  # get_output_kv_signal,; ipc_sent_key_value_cache_by_remote_ptr_block_sync,
             cuda_host_alloc,
             cuda_host_free,
@@ -89,6 +101,12 @@ def ipc_sent_key_value_cache_by_remote_ptr(*args, **kwargs):
         def ipc_sent_key_value_cache_by_remote_ptr_block_sync(*args, **kwargs):
             raise RuntimeError("XPU No ipc_sent_key_value_cache_by_remote_ptr UNIMPLENENTED")
 
+        def swap_cache_per_layer(*args, **kwargs):  # 单层 KV cache 换入算子（同步）
+            raise RuntimeError("XPU swap_cache_per_layer UNIMPLENENTED")
+
+        def swap_cache_per_layer_async(*args, **kwargs):  # 单层 KV cache 换入算子（异步）
+            raise RuntimeError("XPU swap_cache_per_layer_async UNIMPLENENTED")
+
     else:
         raise RuntimeError("Prefix cache ops only supported CUDA nor XPU platform ")
 
@@ -128,6 +146,8 @@ def get_all_visible_devices():
     set_data_ipc = None
     share_external_data_ = None
     swap_cache_all_layers = None
+    swap_cache_per_layer = None  # 单层 KV cache 换入算子（同步）
+    swap_cache_per_layer_async = None  # 单层 KV cache 换入算子（异步）
     unset_data_ipc = None
     set_device = None
     memory_allocated = None
@@ -146,6 +166,8 @@ def get_all_visible_devices():
     "set_data_ipc",
     "share_external_data_",
     "swap_cache_all_layers",
+    "swap_cache_per_layer",  # 单层 KV cache 换入算子（同步）
+    "swap_cache_per_layer_async",  # 单层 KV cache 换入算子（异步，无强制 sync）
     "unset_data_ipc",  # XPU是 None
     "set_device",
     "memory_allocated",

fastdeploy/cache_manager/v1/__init__.py

@@ -0,0 +1,71 @@
+"""
+# Copyright (c) 2025  PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""
+
+from .base import KVCacheBase
+from .cache_controller import CacheController
+from .cache_manager import CacheManager
+from .cache_utils import LayerDoneCounter, LayerSwapTimeoutError
+from .metadata import (
+    AsyncTaskHandler,
+    BlockNode,
+    CacheBlockMetadata,
+    CacheStatus,
+    MatchResult,
+    PDTransferMetadata,
+    StorageConfig,
+    StorageMetadata,
+    StorageType,
+    TransferConfig,
+    TransferResult,
+    TransferStatus,
+    TransferTask,
+    TransferType,
+)
+from .storage import create_storage_connector, create_storage_scheduler
+from .transfer import create_transfer_connector
+from .transfer_manager import CacheTransferManager
+
+__all__ = [
+    # Base classes
+    "KVCacheBase",
+    # Managers
+    "CacheManager",
+    "CacheController",
+    "CacheTransferManager",
+    # Exceptions
+    "LayerSwapTimeoutError",
+    # Utils
+    "LayerDoneCounter",
+    # Metadata
+    "CacheBlockMetadata",
+    "BlockNode",
+    "CacheStatus",
+    "TransferTask",
+    "TransferStatus",
+    "TransferConfig",
+    "TransferResult",
+    "AsyncTaskHandler",
+    "MatchResult",
+    "StorageMetadata",
+    "PDTransferMetadata",
+    "StorageConfig",
+    "StorageType",
+    "TransferType",
+    # Factory functions
+    "create_storage_scheduler",
+    "create_storage_connector",
+    "create_transfer_connector",
+]

fastdeploy/cache_manager/v1/base.py

@@ -0,0 +1,80 @@
+"""
+# Copyright (c) 2025  PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""
+
+from abc import ABC, abstractmethod
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from fastdeploy.config import FDConfig
+
+
+class KVCacheBase(ABC):
+    """
+    Abstract base class for KV cache management.
+
+    This class defines the common interface for cache management operations.
+    Subclasses (CacheManager and CacheController) implement specific behaviors
+    based on their roles in the system.
+
+    CacheManager (Scheduler process):
+        - Manages DeviceBlockPool and HostBlockPool
+        - Handles block allocation and release
+        - Coordinates storage operations via StorageScheduler
+
+    CacheController (Worker process):
+        - Manages cache transfer operations
+        - Handles layer-by-layer transfer synchronization
+        - Coordinates cross-node transfer via TransferConnector
+    """
+
+    def __init__(self, config: "FDConfig"):
+        """
+        Initialize the KV cache base.
+
+        Args:
+            config: FDConfig instance containing all fastdeploy configuration
+        """
+        self.config = config
+
+        # Extract configuration from FDConfig
+        self.model_config = config.model_config
+        self.cache_config = config.cache_config
+        self.quant_config = config.quant_config
+        self.parallel_config = config.parallel_config
+
+        self._initialized = False
+
+    @abstractmethod
+    def reset_cache(self) -> bool:
+        """
+        Reset the cache state.
+
+        This method should be implemented by subclasses to reset their
+        specific cache state (e.g., clear block pools, reset transfer state).
+
+        Returns:
+            True if reset was successful, False otherwise
+        """
+        pass
+
+    def is_initialized(self) -> bool:
+        """
+        Check if the cache has been initialized.
+
+        Returns:
+            True if initialized, False otherwise
+        """
+        return self._initialized