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[P/D][bugfix]Fix the PCP port mapping error issue #5706

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Merged
wangxiyuan merged 3 commits into from
Jan 10, 2026
Merged

[P/D][bugfix]Fix the PCP port mapping error issue #5706

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c859ed6
bugfix_pcp_port_mapping
wangxiaoteng888 Jan 8, 2026
a226536
fix_lint
wangxiaoteng888 Jan 9, 2026
d291c22
fix_ut
wangxiaoteng888 Jan 9, 2026
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24 changes: 15 additions & 9 deletions vllm_ascend/distributed/mooncake_connector.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1154,8 +1154,9 @@ def __init__(self, vllm_config: VllmConfig, engine_id: str):
num_p_block_heads = max(
1, self.num_key_value_heads // self._prefill_tp_size)
self.tp_num_need_pulls = num_d_block_heads // num_p_block_heads
self.local_remote_block_port_mapping = None
self.remote_port_send_num: dict[int, int] = {}
self.local_remote_block_port_mapping: dict[str,
dict[List[List[int]]]] = {}
self.remote_port_send_num: dict[str, dict[int, int]] = {}

def _get_prefill_decode_size(self, vllm_config: VllmConfig):
# get prefill tp and dp size from extra config
Expand Down Expand Up @@ -1453,16 +1454,20 @@ def get_remote_port_send_num(local_remote_block_port_mappings):
remote_port_send_num[remote_port] += 1
return remote_port_send_num

if self.local_remote_block_port_mapping is None:
if meta.remote_engine_id not in self.local_remote_block_port_mapping:
self.local_remote_block_port_mapping[meta.remote_engine_id] = None
if self.local_remote_block_port_mapping[meta.remote_engine_id] is None:
local_remote_block_port_mappings = get_local_remote_block_port_mappings(
)
self.local_remote_block_port_mapping = local_remote_block_port_mappings[
self.handshake_port]
self.remote_port_send_num = get_remote_port_send_num(
local_remote_block_port_mappings)
self.local_remote_block_port_mapping[
meta.remote_engine_id] = local_remote_block_port_mappings[
self.handshake_port]
self.remote_port_send_num[
meta.remote_engine_id] = get_remote_port_send_num(
local_remote_block_port_mappings)

local_remote_block_port_mapping = copy.deepcopy(
self.local_remote_block_port_mapping)
self.local_remote_block_port_mapping[meta.remote_engine_id])

num_external_blocks = math.ceil(meta.num_external_tokens /
self.block_size)
Expand Down Expand Up @@ -1568,7 +1573,8 @@ def start_load_kv(self, metadata: MooncakeConnectorMetadata):
pcp_dcp_rank][i],
offset=i,
tp_num_need_pulls=self.tp_num_need_pulls,
remote_port_send_num=self.remote_port_send_num,
remote_port_send_num=self.remote_port_send_num[
meta.remote_engine_id],
all_task_done=(
pcp_dcp_rank
== len(remote_handshake_port_list) - 1
Expand Down
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