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2026-07-13 12:24:33 +08:00

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Python

# SPDX-License-Identifier: Apache-2.0
"""
Debug protocol definitions for testing and monitoring.
This module defines the protocol for:
- NOOP: No-operation command for testing connectivity and as a heartbeat
"""
# First Party
from lmcache.v1.multiprocess.custom_types import IPCCacheServerKey, KVCache
from lmcache.v1.multiprocess.protocols.base import HandlerType, ProtocolDefinition
# Define request names for this protocol group
REQUEST_NAMES = [
"CB_LOOKUP_PRE_COMPUTED",
"CB_STORE_PRE_COMPUTED",
"CB_RETRIEVE_PRE_COMPUTED",
"CB_STORE_FINAL",
"CB_REGISTER_KV_CACHE",
"CB_UNREGISTER_KV_CACHE",
]
def get_protocol_definitions() -> dict[str, ProtocolDefinition]:
"""
Returns protocol definitions for debug operations.
Returns:
Dictionary mapping request names to their protocol definitions
"""
return {
# Lookup pre-computed chunks
# Payload:
# - key: IPCCacheServerKey - The key containing the token ids
# Returns: List of tuples (start, end) indicating the match ranges
"CB_LOOKUP_PRE_COMPUTED": ProtocolDefinition(
payload_classes=[IPCCacheServerKey],
response_class=list[tuple[int, int]],
handler_type=HandlerType.BLOCKING,
),
# Store pre-computed chunks
# Payload:
# - key: IPCCacheServerKey - The key containing the token ids
# - offset: int - The starting offset in the CB KV cache buffer
# - instance_id: int - Unique identifier for the vLLM instance
# - event_ipc_handle: bytes - IPC handle for event notification
# when the pre-computed chunks are ready
# Returns:
# - IPC handle bytes
# - boolean flag indicating if the store is successful
"CB_STORE_PRE_COMPUTED": ProtocolDefinition(
payload_classes=[IPCCacheServerKey, int, int, bytes],
response_class=tuple[bytes, bool],
handler_type=HandlerType.BLOCKING,
),
# Retrieve pre-computed chunks
# Payload:
# - key: IPCCacheServerKey - The key containing the token ids
# - ranges: List[tuple[int, int]] - List of tuples (start, end) indicating
# the match ranges to retrieve
# - offset: int - The starting offset in the CB KV cache buffer
# - instance_id: int - Unique identifier for the vLLM instance
# - event_ipc_handle: bytes - IPC handle for event notification when the
# retrieval is complete
# Returns:
# - IPC handle bytes
# - boolean flag indicating if the retrieval is successful
"CB_RETRIEVE_PRE_COMPUTED": ProtocolDefinition(
payload_classes=[IPCCacheServerKey, list[tuple[int, int]], int, int, bytes],
response_class=tuple[bytes, bool],
handler_type=HandlerType.BLOCKING,
),
# Store final chunks after processing
# Payload:
# - key: IPCCacheServerKey - The key containing the token ids
# - offset: int - The starting offset in the CB KV cache buffer
# - instance_id: int - Unique identifier for the vLLM instance
# - event_ipc_handle: bytes - IPC handle for event notification
# when the final chunks are stored
# Returns:
# - IPC handle bytes
# - boolean flag indicating if the store is successful
"CB_STORE_FINAL": ProtocolDefinition(
payload_classes=[IPCCacheServerKey, int, int, bytes],
response_class=tuple[bytes, bool],
handler_type=HandlerType.BLOCKING,
),
# Register CB KV Cache
# Payload:
# - instance_id: int - Unique identifier for the vLLM instance
# - kv_cache: KVCache - The CB KV cache configuration
# - model_name: str - Name of the model associated with the engine
# - world_size: int - World size of the engine
# Returns: None
"CB_REGISTER_KV_CACHE": ProtocolDefinition(
payload_classes=[int, KVCache, str, int],
response_class=None,
handler_type=HandlerType.SYNC,
),
# Unregister CB KV Cache
# Payload:
# - instance_id: int - Unique identifier for the vLLM instance
# Returns: None
"CB_UNREGISTER_KV_CACHE": ProtocolDefinition(
payload_classes=[int],
response_class=None,
handler_type=HandlerType.SYNC,
),
}