[feature]Pooling Features and PCP Adaptation (#4143)

This PR let pooling kv connector support pcp feature

- vLLM version: v0.11.2

---------

Signed-off-by: fjw <2270923832@qq.com>
Signed-off-by: SlightwindSec <slightwindsec@gmail.com>
Co-authored-by: SlightwindSec <slightwindsec@gmail.com>

vllm_ascend/distributed/kvpool/ascend_store_connector.py

@@ -43,8 +43,6 @@ class AscendStoreConnector(KVConnectorBase_V1):
 
         self.kv_caches: dict[str, torch.Tensor] = {}
 
-        self._block_size = vllm_config.cache_config.block_size
-
         self.sended_but_unfinished_reqs: set[str] = set()
 
         if role == KVConnectorRole.SCHEDULER:

vllm_ascend/distributed/kvpool/config_data.py

@@ -17,6 +17,10 @@ class KeyMetadata:
     model_name: str
     """ worker id when running under a distributed setting """
     head_or_tp_rank: int
+    """ Initialize the current prefill context model parallel rank """
+    pcp_rank: int
+    """ Initialize the current decode context model parallel rank """
+    dcp_rank: int
 
 
 @dataclass(order=True)
@@ -28,12 +32,15 @@ class PoolKey:
         return hash((
             self.key_metadata.model_name,
             self.key_metadata.head_or_tp_rank,
+            self.key_metadata.pcp_rank,
+            self.key_metadata.dcp_rank,
             self.chunk_hash,
         ))
 
     def to_string(self):
         return (
             f"{self.key_metadata.model_name}"
+            f"@pcp{self.key_metadata.pcp_rank}@dcp{self.key_metadata.dcp_rank}"
             f"@head_or_tp_rank:{self.key_metadata.head_or_tp_rank}@{self.chunk_hash}"
         )
 
@@ -60,6 +67,8 @@ class LayerPoolKey(PoolKey):
         return hash((
             self.key_metadata.model_name,
             self.key_metadata.head_or_tp_rank,
+            self.key_metadata.pcp_rank,
+            self.key_metadata.dcp_rank,
             self.chunk_hash,
             self.layer_id,
         ))
@@ -67,6 +76,7 @@ class LayerPoolKey(PoolKey):
     def to_string(self):
         return (
             f"{self.key_metadata.model_name}"
+            f"@pcp{self.key_metadata.pcp_rank}@dcp{self.key_metadata.dcp_rank}"
             f"@head_or_tp_rank:{self.key_metadata.head_or_tp_rank}@{self.chunk_hash}@{self.layer_id}"
         )
 

vllm_ascend/distributed/kvpool/kv_transfer.py

@@ -19,11 +19,13 @@ from vllm_ascend.distributed.kvpool.config_data import (ChunkedTokenDatabase,
 class KVTransferThread(threading.Thread):
 
     def __init__(self, m_store: Backend, token_database: ChunkedTokenDatabase,
-                 tp_rank: int, ready_event: threading.Event, name: str):
+                 tp_rank: int, dcp_size: int, ready_event: threading.Event,
+                 name: str):
         super().__init__(daemon=True, name=name)
         self.m_store = m_store
         self.ready_event = ready_event
         self.tp_rank = tp_rank
+        self.dcp_size = dcp_size
         self.token_database = token_database
         self.done_task_lock = threading.Lock()
         self.request_queue: queue.Queue[Any] = queue.Queue()
@@ -87,10 +89,12 @@ class KVTransferThread(threading.Thread):
 class KVCacheStoreSendingThread(KVTransferThread):
 
     def __init__(self, m_store: Backend, token_database: ChunkedTokenDatabase,
-                 tp_rank: int, put_step: int, ready_event: threading.Event):
+                 tp_rank: int, dcp_size: int, put_step: int,
+                 ready_event: threading.Event):
         super().__init__(m_store,
                          token_database,
                          tp_rank,
+                         dcp_size,
                          ready_event,
                          name="KVCacheSendingThread")
         self.put_step = put_step
@@ -112,12 +116,18 @@ class KVCacheStoreSendingThread(KVTransferThread):
             key_list.append(key.to_string())
             addr_list.append(addr)
             size_list.append(size)
-        key_list_tp = key_list[self.tp_rank % self.put_step::self.put_step]
+        if self.dcp_size > 1:
-        addr_list_tp = addr_list[self.tp_rank % self.put_step::self.put_step]
-        size_list_tp = size_list[self.tp_rank % self.put_step::self.put_step]
-        if key_list_tp:
             torch.npu.current_stream().synchronize()
-            self.m_store.put(key_list_tp, addr_list_tp, size_list_tp)
+            self.m_store.put(key_list, addr_list, size_list)
+        else:
+            key_list_tp = key_list[self.tp_rank % self.put_step::self.put_step]
+            addr_list_tp = addr_list[self.tp_rank %
+                                     self.put_step::self.put_step]
+            size_list_tp = size_list[self.tp_rank %
+                                     self.put_step::self.put_step]
+            if key_list_tp:
+                torch.npu.current_stream().synchronize()
+                self.m_store.put(key_list_tp, addr_list_tp, size_list_tp)
         if is_last_chunk:
             self.set_finished_request(req_id)
         self.request_queue.task_done()
@@ -126,10 +136,11 @@ class KVCacheStoreSendingThread(KVTransferThread):
 class KVCacheStoreRecvingThread(KVTransferThread):
 
     def __init__(self, m_store: Backend, token_database: ChunkedTokenDatabase,
-                 tp_rank: int, ready_event: threading.Event):
+                 tp_rank: int, dcp_size: int, ready_event: threading.Event):
         super().__init__(m_store,
                          token_database,
                          tp_rank,
+                         dcp_size,
                          ready_event,
                          name="KVCacheStoreRecvingThread")
 
@@ -166,11 +177,12 @@ class KVCacheStoreRecvingThread(KVTransferThread):
 class KVCacheStoreLayerSendingThread(KVTransferThread):
 
     def __init__(self, m_store: Backend, token_database: ChunkedTokenDatabase,
-                 tp_rank: int, put_step: int, ready_event: threading.Event,
+                 tp_rank: int, dcp_size: int, put_step: int,
-                 num_layers: int):
+                 ready_event: threading.Event, num_layers: int):
         super().__init__(m_store,
                          token_database,
                          tp_rank,
+                         dcp_size,
                          ready_event,
                          name="KVCacheStoreLayerSendingThread")
         self.final_layer_id = num_layers - 1
@@ -192,12 +204,18 @@ class KVCacheStoreLayerSendingThread(KVTransferThread):
             key_list.append(key.to_string())
             addr_list.append(addr)
             size_list.append(size)
-        key_list_tp = key_list[self.tp_rank % self.put_step::self.put_step]
+        if self.dcp_size > 1:
-        addr_list_tp = addr_list[self.tp_rank % self.put_step::self.put_step]
-        size_list_tp = size_list[self.tp_rank % self.put_step::self.put_step]
-        if key_list_tp:
             torch.npu.current_stream().synchronize()
-            self.m_store.put(key_list_tp, addr_list_tp, size_list_tp)
+            self.m_store.put(key_list, addr_list, size_list)
+        else:
+            key_list_tp = key_list[self.tp_rank % self.put_step::self.put_step]
+            addr_list_tp = addr_list[self.tp_rank %
+                                     self.put_step::self.put_step]
+            size_list_tp = size_list[self.tp_rank %
+                                     self.put_step::self.put_step]
+            if key_list_tp:
+                torch.npu.current_stream().synchronize()
+                self.m_store.put(key_list_tp, addr_list_tp, size_list_tp)
         if req_meta.layer_id == self.final_layer_id and req_meta.is_last_chunk:
             self.set_finished_request(req_meta.req_id)
         self.request_queue.task_done()
@@ -206,11 +224,12 @@ class KVCacheStoreLayerSendingThread(KVTransferThread):
 class KVCacheStoreLayerRecvingThread(KVTransferThread):
 
     def __init__(self, m_store: Backend, token_database: ChunkedTokenDatabase,
-                 tp_rank: int, ready_event: threading.Event,
+                 tp_rank: int, dcp_size: int, ready_event: threading.Event,
                  get_event: threading.Event):
         super().__init__(m_store,
                          token_database,
                          tp_rank,
+                         dcp_size,
                          ready_event,
                          name="KVCacheStoreLayerRecvingThread")
         self.get_event = get_event

vllm_ascend/distributed/kvpool/pool_scheduler.py

@@ -29,7 +29,14 @@ class KVPoolScheduler:
             "load_async", False)
         # request_id -> (vllm cached tokes, kvpool cached tokens)
         self.load_specs: dict[str, LoadSpec] = {}
+        self.pcp_size = vllm_config.parallel_config.prefill_context_parallel_size
+        self.dcp_size = vllm_config.parallel_config.decode_context_parallel_size
+
         self._block_size = vllm_config.cache_config.block_size
+        if self.pcp_size > 1:
+            self._block_size *= self.pcp_size
+        if self.dcp_size > 1:
+            self._block_size *= self.dcp_size
         # request_id -> full_token_ids
         self._request_trackers: dict[str, RequestTracker] = {}
         # Whether to discard partial chunks

vllm_ascend/distributed/kvpool/pool_worker.py

@@ -1,11 +1,13 @@
-# Standard
 import math
 import threading
 from typing import Dict, Generator, Optional, Type
 
-# Third Party
 import torch
 from vllm.config import VllmConfig
+from vllm.distributed import (get_decode_context_model_parallel_rank,
+                              get_decode_context_model_parallel_world_size,
+                              get_tensor_model_parallel_rank,
+                              get_tensor_model_parallel_world_size)
 from vllm.utils import logger
 from vllm.v1.core.kv_cache_utils import BlockHash
 
@@ -20,6 +22,14 @@ from vllm_ascend.distributed.kvpool.config_data import (
 from vllm_ascend.distributed.kvpool.kv_transfer import (
     KVCacheStoreLayerRecvingThread, KVCacheStoreLayerSendingThread,
     KVCacheStoreRecvingThread, KVCacheStoreSendingThread, KVTransferThread)
+from vllm_ascend.utils import prefill_context_parallel_enable
+
+if prefill_context_parallel_enable():
+    # isort: off
+    from vllm.distributed import (get_prefill_context_model_parallel_rank,
+                                  get_prefill_context_model_parallel_world_size
+                                  )
+    # isort: on
 
 backend_map: Dict[str, Type[Backend]] = {
     "mooncake": MooncakeBackend,
@@ -44,17 +54,30 @@ class KVPoolWorker:
                 and model_config.use_mla):
             self.use_mla = True
         self.use_layerwise = use_layerwize
-        self.tp_rank = parallel_config.rank
+        self.tp_rank = get_tensor_model_parallel_rank()
-        self.tp_size = parallel_config.tensor_parallel_size
+        self.tp_size = get_tensor_model_parallel_world_size()
+
+        self.pcp_size = get_prefill_context_model_parallel_world_size(
+        ) if prefill_context_parallel_enable() else 1
+        self.pcp_rank = get_prefill_context_model_parallel_rank(
+        ) if self.pcp_size > 1 else 0
+        self.dcp_size = get_decode_context_model_parallel_world_size()
+        self.dcp_rank = get_decode_context_model_parallel_rank(
+        ) if self.dcp_size > 1 else 0
+
         self.kv_role = vllm_config.kv_transfer_config.kv_role
         self.load_async = vllm_config.kv_transfer_config.kv_connector_extra_config.get(
             "load_async", False)
         self.backend = vllm_config.kv_transfer_config.kv_connector_extra_config.get(
             "backend", "mooncake")
         self.block_size = vllm_config.cache_config.block_size
+
+        if self.pcp_size > 1:
+            self.block_size *= self.pcp_size
+        if self.dcp_size > 1:
+            self.block_size *= self.dcp_size
         self.current_layer = 0
         self.num_layers = model_config.get_num_layers(parallel_config)
-        self.block_size = vllm_config.cache_config.block_size
 
         if self.use_mla:
             self.num_kv_head = 1
@@ -69,8 +92,10 @@ class KVPoolWorker:
             self.put_step = 1
 
         self.metadata = KeyMetadata(
-            model_config.model,
+            model_config.model.split('/')[-1],
             self.head_or_tp_rank,
+            self.pcp_rank,
+            self.dcp_rank,
         )
 
         self.token_database = ChunkedTokenDatabase(self.metadata,
@@ -147,12 +172,13 @@ class KVPoolWorker:
                 ready_event_sending = threading.Event()
                 self.kv_send_thread = KVCacheStoreLayerSendingThread(
                     self.m_store, self.token_database, self.tp_rank,
-                    self.put_step, ready_event_sending, self.num_layers)
+                    self.dcp_size, self.put_step, ready_event_sending,
+                    self.num_layers)
                 self.kv_send_thread.start()
             ready_event = threading.Event()
             self.kv_recv_thread = KVCacheStoreLayerRecvingThread(
-                self.m_store, self.token_database, self.tp_rank, ready_event,
+                self.m_store, self.token_database, self.tp_rank, self.dcp_size,
-                self.get_event)
+                ready_event, self.get_event)
             self.kv_recv_thread.start()
             ready_event.wait()
         else:
@@ -160,13 +186,13 @@ class KVPoolWorker:
                 ready_event_sending = threading.Event()
                 self.kv_send_thread = KVCacheStoreSendingThread(
                     self.m_store, self.token_database, self.tp_rank,
-                    self.put_step, ready_event_sending)
+                    self.dcp_size, self.put_step, ready_event_sending)
                 self.kv_send_thread.start()
             if self.load_async:
                 ready_event = threading.Event()
                 self.kv_recv_thread = KVCacheStoreRecvingThread(
                     self.m_store, self.token_database, self.tp_rank,
-                    ready_event)
+                    self.dcp_size, ready_event)
                 self.kv_recv_thread.start()
                 ready_event.wait()