43276fd822
### What this PR does / why we need it? The cache for MLA decode graph parameters was holding strong references to tensors, preventing them from being garbage collected and leading to increased memory usage. This change wraps the cached tensors in weak references, allowing them to be deallocated when no longer in use and reducing overall memory pressure. ### Does this PR introduce _any_ user-facing change? None. ### How was this patch tested? None. Signed-off-by: Yizhou Liu <liu_yizhou@outlook.com>
1318 lines
57 KiB
Python
1318 lines
57 KiB
Python
from dataclasses import dataclass
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from typing import (TYPE_CHECKING, ClassVar, NamedTuple, Optional, Tuple, Type,
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TypeVar)
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import torch
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import torch_npu
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from torch import nn
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from vllm.attention.backends.abstract import (AttentionBackend,
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AttentionMetadata,
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MLAAttentionImpl)
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from vllm.config import VllmConfig, get_current_vllm_config
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from vllm.distributed import get_tensor_model_parallel_world_size
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from vllm.forward_context import ForwardContext, get_forward_context
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from vllm.logger import logger
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from vllm.model_executor.layers.linear import (LinearBase,
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UnquantizedLinearMethod)
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from vllm.utils import cdiv, round_down
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from vllm.v1.attention.backends.utils import AttentionCGSupport
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from vllm_ascend import envs
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from vllm_ascend.ascend_config import get_ascend_config
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from vllm_ascend.attention.attention_v1 import AscendAttentionState
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from vllm_ascend.attention.utils import (AscendCommonAttentionMetadata,
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maybe_save_kv_layer_to_connector,
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split_decodes_and_prefills,
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trans_rope_weight, transdata,
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wait_for_kv_layer_from_connector)
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from vllm_ascend.compilation.acl_graph import (get_graph_params,
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update_graph_params_workspaces)
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from vllm_ascend.multistream.base import MSAttentionMetadataSplitConfig
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from vllm_ascend.multistream.context import get_multistream_comm_context
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from vllm_ascend.multistream.ms_split import model_input_split_v1_mla_attn
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from vllm_ascend.ops.weight_prefetch import maybe_npu_prefetch
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from vllm_ascend.quantization.w8a8 import AscendW8A8LinearMethod
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from vllm_ascend.utils import (ACL_FORMAT_FRACTAL_ND, ACL_FORMAT_FRACTAL_NZ,
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is_enable_nz, weak_ref_tensors)
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from vllm_ascend.worker.npu_input_batch import InputBatch
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if TYPE_CHECKING:
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from vllm.v1.core.sched.output import SchedulerOutput
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class AscendMLABackend(AttentionBackend):
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accept_output_buffer: bool = True
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@staticmethod
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def get_name() -> str:
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return "ASCEND_MLA"
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@staticmethod
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def get_metadata_cls() -> type["AttentionMetadata"]:
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return AscendMLAMetadata
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@staticmethod
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def get_builder_cls():
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return AscendMLAMetadataBuilder
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@staticmethod
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def get_kv_cache_shape(num_blocks: int, block_size: int, num_kv_heads: int,
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head_size: int) -> tuple[int, ...]:
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return (num_blocks, block_size, num_kv_heads, head_size)
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@staticmethod
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def get_impl_cls() -> Type["MLAAttentionImpl"]:
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return AscendMLAImpl
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@dataclass
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class AscendMLAPrefillMetadata:
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""" Prefill Specific Metadata for Ascend"""
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@dataclass
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class ChunkedContextMetadata:
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# New for MLA (compared to FlashAttention)
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# For handling chunked prefill
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cu_seq_lens: torch.Tensor
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starts: torch.Tensor
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seq_tot: list[int]
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max_seq_lens: list[int]
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workspace: torch.Tensor
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chunk_seq_lens: torch.Tensor
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attn_mask: torch.Tensor
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query_lens: torch.Tensor
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seq_lens: list[int]
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context_lens: torch.Tensor
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input_positions: torch.Tensor
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query_start_loc: torch.Tensor
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block_table: torch.Tensor
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max_query_len: int
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max_seq_lens: int
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chunked_context: Optional[ChunkedContextMetadata] = None
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sin: torch.Tensor = None
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cos: torch.Tensor = None
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@dataclass
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class AscendMLADecodeMetadata:
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# Input positions for rotrary embeddings since for MLA the rotary
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# position embeddings are applied inside the attention backend
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input_positions: torch.Tensor
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block_table: torch.Tensor
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seq_lens: torch.Tensor
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max_seq_lens: int
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seq_lens_list: list[int]
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actual_seq_lengths_q: Optional[list[int]] = None
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attn_mask: Optional[torch.Tensor] = None
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sin: torch.Tensor = None
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cos: torch.Tensor = None
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@dataclass
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class AscendMLAMetadata:
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"""Metadata for MLACommon.
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NOTE: Please read the comment at the top of the file before trying to
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understand this class
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"""
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# NOTE(sang): Definition of context_len, query_len, and seq_len.
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# |---------- N-1 iteration --------|
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# |---------------- N iteration ---------------------|
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# |- tokenA -|......................|-- newTokens ---|
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# |---------- context_len ----------|
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# |-------------------- seq_len ---------------------|
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# |-- query_len ---|
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num_actual_tokens: int # Number of tokens excluding padding.
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slot_mapping: torch.Tensor
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query_start_loc: torch.Tensor
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seq_lens: torch.Tensor
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block_tables: torch.Tensor
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# New for MLA (compared to FlashAttention)
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# For handling prefill decode split
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num_decodes: int
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num_decode_tokens: int
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num_prefills: int
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# For logging.
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num_input_tokens: int = 0 # Number of tokens including padding.
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query_lens: Optional[list[int]] = None
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# The dimension of the attention heads
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head_dim: Optional[int] = None
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attn_mask: torch.Tensor = None
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# chunked prefill by default if no attn_states passed
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attn_state: AscendAttentionState = AscendAttentionState.ChunkedPrefill
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decode: Optional[AscendMLADecodeMetadata] = None
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prefill: Optional[AscendMLAPrefillMetadata] = None
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enable_dbo_across_dp: bool = False
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def __post_init__(self):
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pass
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# supported_head_sizes = AscendMLABackend.get_supported_head_sizes()
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# if self.head_dim is not None and self.head_dim \
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# not in supported_head_sizes:
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# raise ValueError(
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# f"Only {supported_head_sizes} are supported for head_dim,",
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# f"received {self.head_dim}.")
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def split_metadata_for_multistream(
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self,
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ms_split_config: MSAttentionMetadataSplitConfig,
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) -> list["AscendMLAMetadata"]:
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"""Split metadata for multi-stream with AscendMLAMetadata"""
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return model_input_split_v1_mla_attn(
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ms_split_config=ms_split_config,
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attn_metadata=self,
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_metadata_cls=AscendMLAMetadata,
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)
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M = TypeVar("M", bound=AscendMLAMetadata)
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class AscendMLAMetadataBuilder:
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# Does this backend/builder support ACL Graphs for attention (default: no).
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aclgraph_support: ClassVar[AttentionCGSupport] = \
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AttentionCGSupport.UNIFORM_BATCH
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"""
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NOTE: Please read the comment at the top of the file before trying to
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understand this class
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"""
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# _attn_mask_builder = None
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def __init__(self,
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kv_cache_spec,
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layer_names,
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vllm_config: VllmConfig,
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device: torch.device,
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metadata_cls: Optional[AscendMLAMetadata] = None):
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self.metadata_cls: Optional[AscendMLAMetadata] = metadata_cls \
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if metadata_cls is not None else AscendMLAMetadata # type: ignore
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self.vllm_config = vllm_config
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self.model_config = vllm_config.model_config
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self.device = device
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scheduler_config = vllm_config.scheduler_config
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self.block_size = vllm_config.cache_config.block_size
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self.max_blocks = (vllm_config.model_config.max_model_len +
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self.block_size - 1) // self.block_size
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self.chunked_prefill_enabled = scheduler_config.chunked_prefill_enabled
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self.speculative_config = vllm_config.speculative_config
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self.decode_threshold = 1
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if self.speculative_config:
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spec_token_num = self.speculative_config.num_speculative_tokens
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self.decode_threshold += spec_token_num
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assert self.decode_threshold <= 16, f"decode_threshold exceeded \
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npu_fused_infer_attention_score TND layout's limit of 16, \
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got {self.decode_threshold}"
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self.reorder_batch_threshold = self.decode_threshold
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if self.chunked_prefill_enabled:
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self.chunked_prefill_workspace_size = min(
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# Max sure there is enough for 8 full length request or at least
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# 4 pages of cache per request
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max(8 * self.model_config.max_model_len,
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4 * scheduler_config.max_num_seqs * self.block_size),
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# For long-context models try not to over-allocate limiting
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# kv-cache space, limiting it to 64k tokens,
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# which would result in the workspace being:
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# 2*(576)*(64*1024) = 144mb
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# (assuming 576 MLA head dim, and fp16)
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# which would result in up-projected context being
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# 2*(192*128)*(64*1024) = 3gb
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# (assuming 192 QK head dim, 128 heads, and fp16)
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128 * 1024)
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assert self.chunked_prefill_workspace_size >= \
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scheduler_config.max_num_seqs * self.block_size
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self.chunked_prefill_workspace = torch.empty(
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(self.chunked_prefill_workspace_size,
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self.model_config.get_head_size()),
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dtype=self.model_config.dtype,
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device=device,
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)
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self.rope_dim = self.model_config.hf_text_config.qk_rope_head_dim
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self.cos_cache = None
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self.sin_cache = None
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def reorder_batch(self, input_batch: "InputBatch",
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scheduler_output: "SchedulerOutput") -> bool:
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# We now want to reorder the batch so that the "decode" requests are at
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# the front and the "prefill" requests are at the using the least amount
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# swaps possible. (NOTE for now we loosely use "decode" to mean requests
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# where attention is likely memory-bound and "prefill" to mean requests
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# where attention is likely compute-bound, TODO(lucas): figure out a
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# better naming here)
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decodes = []
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prefills = []
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for i, req_id in enumerate(input_batch.req_ids):
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num_tokens = scheduler_output.num_scheduled_tokens[req_id]
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if num_tokens <= self.decode_threshold:
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decodes.append(i)
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else:
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prefills.append(i)
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# We hope that this is fairly minimal since decodes
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# should be around for a number of iterations so hopefully they are
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# relatively stationary (and new request are generally appended to the
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# persistent batch so already should be at the back)
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# To achieve this we loop over the decodes in descending order and
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# the prefills in ascending order. We swap decodes from the "back"
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# i.e. past where the last decode should be in the reodorered with
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# prefills from the front of the batch.
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# `decodes` and `prefills` are already in ascending order just based on
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# the above loop
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num_decodes = len(decodes)
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num_prefills = len(prefills)
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first_prefill = 0
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modified_batch = False
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for i in range(1, min(num_decodes, num_prefills) + 1):
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# If the decode is at the "back" of the batch, i, we can swap it
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# with the prefill closest to the front of the batch
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if decodes[num_decodes - i] >= num_decodes:
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input_batch.swap_states(prefills[first_prefill],
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decodes[num_decodes - i])
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first_prefill += 1
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modified_batch = True
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else:
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break
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# Save for next `build` call
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# TODO(lucas): this is a bit of a hack, we should probably have a
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# better way of doing this
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return modified_batch
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def build(
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self,
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common_prefix_len: int,
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common_attn_metadata: AscendCommonAttentionMetadata,
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model: nn.Module,
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) -> AscendMLAMetadata:
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num_reqs = common_attn_metadata.num_reqs
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num_actual_tokens = common_attn_metadata.num_actual_tokens
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query_start_loc = common_attn_metadata.query_start_loc
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query_start_loc_cpu = common_attn_metadata.query_start_loc_cpu
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num_decodes, num_prefills, num_decode_tokens, num_prefill_tokens = \
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split_decodes_and_prefills(common_attn_metadata, decode_threshold=self.decode_threshold)
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assert num_decodes + num_prefills == num_reqs
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assert num_decode_tokens + num_prefill_tokens == num_actual_tokens
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# Note(simon): be careful about the CPU <> GPU memory movement in this
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# function. We should avoid GPU -> CPU sync as much as possible because
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# it blocks on all previous kernels.
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device = self.device
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block_table = (common_attn_metadata.block_table_tensor[:num_reqs])
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slot_mapping = common_attn_metadata.slot_mapping[:num_actual_tokens]
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input_positions = common_attn_metadata.positions[:
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num_actual_tokens].long(
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)
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if self.cos_cache is None:
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self.cos_cache = model.model.layers[
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model.model.start_layer].self_attn.rotary_emb.cos_cached
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self.sin_cache = model.model.layers[
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model.model.start_layer].self_attn.rotary_emb.sin_cached
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if self.cos_cache.dtype != self.model_config.dtype: # type: ignore
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self.cos_cache = self.cos_cache.to( # type: ignore
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self.model_config.dtype) # type: ignore
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self.sin_cache = self.sin_cache.to( # type: ignore
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self.model_config.dtype) # type: ignore
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query_seq_lens_cpu = query_start_loc_cpu[1:] - query_start_loc_cpu[:-1]
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query_lens = query_seq_lens_cpu[:num_reqs]
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seq_lens = common_attn_metadata.seq_lens_cpu[:num_reqs]
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num_computed_tokens_cpu = (seq_lens - query_lens)
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prefill_metadata = None
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chunked_context_metadata = None
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if num_prefills > 0:
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reqs_start = num_decodes # prefill_start
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tokens_start = num_decode_tokens
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max_query_len = query_lens[reqs_start:].max().item()
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max_seq_lens = seq_lens[reqs_start:].max().item()
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prefill_query_start_loc = query_start_loc[
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reqs_start:] - query_start_loc[reqs_start]
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context_lens_cpu = num_computed_tokens_cpu[reqs_start:num_reqs]
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max_context_len_cpu = context_lens_cpu.max().item()
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num_prefills_with_context_cpu = (context_lens_cpu > 0).sum().item()
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if self.chunked_prefill_enabled and max_context_len_cpu > 0:
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max_context_chunk = (self.chunked_prefill_workspace_size //
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num_prefills_with_context_cpu)
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max_context_chunk = round_down(max_context_chunk,
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self.block_size)
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assert max_context_chunk > 0
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num_chunks = cdiv(max_context_len_cpu, max_context_chunk)
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chunk_starts = torch.arange(num_chunks, dtype=torch.int32) \
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.unsqueeze(1).expand(-1, num_prefills) * max_context_chunk
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chunk_ends = torch.min(context_lens_cpu.unsqueeze(0),
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chunk_starts + max_context_chunk)
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chunk_seq_lens = (chunk_ends - chunk_starts).clamp(min=0)
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cu_seq_lens_cpu = torch.zeros(num_chunks,
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num_prefills + 1,
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dtype=torch.int32,
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pin_memory=True)
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torch.cumsum(chunk_seq_lens,
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dim=1,
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out=cu_seq_lens_cpu[:, 1:],
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dtype=torch.int32)
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chunked_context_metadata = \
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AscendMLAPrefillMetadata.ChunkedContextMetadata(
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cu_seq_lens=cu_seq_lens_cpu.to(device, non_blocking=True),
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starts=chunk_starts.to(device, non_blocking=True),
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seq_tot=chunk_seq_lens.sum(dim=1).tolist(),
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max_seq_lens=chunk_seq_lens.max(dim=1).values.tolist(),
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chunk_seq_lens=chunk_seq_lens,
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workspace=self.chunked_prefill_workspace,
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)
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prefill_input_positions = input_positions[tokens_start:]
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cos = self.cos_cache[
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prefill_input_positions].unsqueeze( # type: ignore
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1).unsqueeze(2)
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sin = self.sin_cache[
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prefill_input_positions].unsqueeze( # type: ignore
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1).unsqueeze(2)
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prefill_metadata = AscendMLAPrefillMetadata(
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attn_mask=common_attn_metadata.attn_mask,
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query_lens=query_lens[reqs_start:].to(torch.int32),
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seq_lens=seq_lens,
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context_lens=seq_lens[reqs_start:],
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input_positions=prefill_input_positions,
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block_table=block_table[reqs_start:, ...],
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max_query_len=max_query_len,
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max_seq_lens=max_seq_lens,
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query_start_loc=prefill_query_start_loc,
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chunked_context=chunked_context_metadata,
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sin=sin,
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cos=cos,
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)
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decode_metadata = None
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if num_decodes > 0:
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cos = common_attn_metadata.cos
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sin = common_attn_metadata.sin
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# Notice that num_decodes != num_decode_tokens in SpecDecoding Scenario
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actual_seq_lengths_q = query_start_loc[1:num_decodes + 1].tolist()
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max_seq_lens = seq_lens[:num_decodes].max().item()
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seq_lens = seq_lens[:num_decodes]
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input_positions = input_positions[:num_decode_tokens]
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block_table = block_table[:num_decodes, ...]
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seq_lens_list = seq_lens.tolist()
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# TODO: After the fullgraph supports MTP, the if branch needs to deleted
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assert self.cos_cache is not None
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assert self.sin_cache is not None
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if cos is None and sin is None:
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cos = self.cos_cache[
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input_positions].unsqueeze( # type: ignore
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1).unsqueeze(2)
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sin = self.sin_cache[
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input_positions].unsqueeze( # type: ignore
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1).unsqueeze(2)
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decode_metadata = AscendMLADecodeMetadata(
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input_positions=input_positions,
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block_table=block_table,
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seq_lens=seq_lens,
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seq_lens_list=seq_lens_list,
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max_seq_lens=max_seq_lens,
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attn_mask=common_attn_metadata.spec_attn_mask,
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actual_seq_lengths_q=actual_seq_lengths_q,
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sin=sin,
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cos=cos)
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else:
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cos[:num_decode_tokens,
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...] = self.cos_cache[input_positions].unsqueeze(
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1).unsqueeze(2)
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sin[:num_decode_tokens,
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...] = self.sin_cache[input_positions].unsqueeze(
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|
1).unsqueeze(2)
|
|
|
|
decode_metadata = AscendMLADecodeMetadata(
|
|
input_positions=input_positions,
|
|
block_table=block_table,
|
|
seq_lens=seq_lens,
|
|
seq_lens_list=seq_lens_list,
|
|
max_seq_lens=max_seq_lens,
|
|
attn_mask=common_attn_metadata.spec_attn_mask,
|
|
actual_seq_lengths_q=actual_seq_lengths_q,
|
|
sin=sin[:num_decode_tokens, ...],
|
|
cos=cos[:num_decode_tokens, ...])
|
|
|
|
return self.metadata_cls( # type: ignore
|
|
num_input_tokens=common_attn_metadata.num_input_tokens,
|
|
num_actual_tokens=num_actual_tokens,
|
|
query_lens=query_lens.tolist(),
|
|
slot_mapping=slot_mapping,
|
|
head_dim=self.model_config.get_head_size(),
|
|
num_decodes=num_decodes,
|
|
num_decode_tokens=num_decode_tokens,
|
|
num_prefills=num_prefills,
|
|
attn_mask=common_attn_metadata.attn_mask,
|
|
attn_state=common_attn_metadata.attn_state,
|
|
prefill=prefill_metadata,
|
|
decode=decode_metadata,
|
|
query_start_loc=query_start_loc,
|
|
block_tables=block_table,
|
|
seq_lens=seq_lens,
|
|
enable_dbo_across_dp=common_attn_metadata.enable_dbo_across_dp,
|
|
)
|
|
|
|
def build_for_graph_capture(
|
|
self,
|
|
common_attn_metadata: AscendCommonAttentionMetadata,
|
|
attn_state: AscendAttentionState = AscendAttentionState.DecodeOnly,
|
|
model: Optional[nn.Module] = None,
|
|
):
|
|
if attn_state in {
|
|
AscendAttentionState.DecodeOnly,
|
|
AscendAttentionState.SpecDecoding
|
|
}:
|
|
attn_metadata = self.build(
|
|
common_prefix_len=0,
|
|
common_attn_metadata=common_attn_metadata,
|
|
model=model,
|
|
)
|
|
else:
|
|
raise NotImplementedError(
|
|
"Currently we only support building dummy metadata for DecodeOnly and SpecDecoding state"
|
|
)
|
|
|
|
attn_metadata.attn_state = attn_state
|
|
return attn_metadata
|
|
|
|
|
|
class DecodeMLAPreprocessResult(NamedTuple):
|
|
ql_nope: Optional[torch.Tensor] = None
|
|
q_pe: Optional[torch.Tensor] = None
|
|
k_nope: Optional[torch.Tensor] = None
|
|
k_pe: Optional[torch.Tensor] = None
|
|
|
|
|
|
class PrefillMLAPreprocessResult(NamedTuple):
|
|
q_nope: Optional[torch.Tensor] = None
|
|
q_pe: Optional[torch.Tensor] = None
|
|
k_nope: Optional[torch.Tensor] = None
|
|
k_pe: Optional[torch.Tensor] = None
|
|
value: Optional[torch.Tensor] = None
|
|
|
|
|
|
class AscendMLAImpl(MLAAttentionImpl):
|
|
"""
|
|
NOTE: Please read the comment at the top of the file before trying to
|
|
understand this class
|
|
"""
|
|
|
|
def __init__(
|
|
self,
|
|
num_heads: int,
|
|
head_size: int,
|
|
scale: float,
|
|
num_kv_heads: int,
|
|
alibi_slopes: Optional[list[float]],
|
|
sliding_window: Optional[int],
|
|
kv_cache_dtype: str,
|
|
logits_soft_cap: Optional[float],
|
|
attn_type: str,
|
|
kv_sharing_target_layer_name: Optional[str],
|
|
**kwargs,
|
|
) -> None:
|
|
self.num_heads = num_heads
|
|
self.head_size = head_size
|
|
self.scale = float(scale)
|
|
self.num_kv_heads = num_kv_heads
|
|
self.kv_cache_dtype = kv_cache_dtype
|
|
|
|
# MLA Args
|
|
self.q_lora_rank = kwargs['q_lora_rank']
|
|
self.kv_lora_rank = kwargs['kv_lora_rank']
|
|
self.qk_nope_head_dim = kwargs['qk_nope_head_dim']
|
|
self.qk_rope_head_dim = kwargs['qk_rope_head_dim']
|
|
self.qk_head_dim = kwargs['qk_head_dim']
|
|
self.v_head_dim = kwargs['v_head_dim']
|
|
self.rotary_emb = kwargs['rotary_emb']
|
|
self.fused_qkv_a_proj = kwargs.get('fused_qkv_a_proj', None)
|
|
self.q_proj = kwargs['q_proj'] if self.q_lora_rank is None else kwargs[
|
|
'q_b_proj']
|
|
self.kv_b_proj = kwargs['kv_b_proj']
|
|
self.o_proj = kwargs['o_proj']
|
|
self.kv_a_proj_with_mqa = kwargs.get('kv_a_proj_with_mqa', None)
|
|
self.kv_a_layernorm = kwargs.get('kv_a_layernorm', None)
|
|
self.q_a_layernorm = kwargs.get('q_a_layernorm', None)
|
|
self.num_queries_per_kv = self.num_heads // self.num_kv_heads
|
|
self.tp_size = get_tensor_model_parallel_world_size()
|
|
|
|
ascend_config = get_ascend_config()
|
|
self.enable_shared_expert_dp = ascend_config.enable_shared_expert_dp
|
|
self.enable_prefetch = ascend_config.weight_prefetch_config.enabled
|
|
self.enable_kv_nz = ascend_config.torchair_graph_config.enable_kv_nz
|
|
|
|
vllm_config = get_current_vllm_config()
|
|
self.ring_mla_mask_size = 512
|
|
self.prefill_mask = None
|
|
|
|
self.speculative_config = vllm_config.speculative_config
|
|
self.enable_mlapo = envs.VLLM_ASCEND_ENABLE_MLAPO
|
|
|
|
def _v_up_proj(self, x):
|
|
if self.W_UV.shape[0] * self.W_UV.shape[1] < 65536:
|
|
x = x.view(-1, self.num_heads, self.kv_lora_rank)
|
|
x = torch_npu.npu_transpose_batchmatmul(x,
|
|
self.W_UV,
|
|
perm_x1=[1, 0, 2],
|
|
perm_x2=[0, 1, 2],
|
|
perm_y=[1, 0, 2])
|
|
x = x.reshape(-1, self.num_heads * self.v_head_dim)
|
|
else:
|
|
# Convert from (B, N, L) to (N, B, L)
|
|
x = x.view(-1, self.num_heads, self.kv_lora_rank).transpose(0, 1)
|
|
# # Multiply (N, B, L) x (N, L, V) -> (N, B, V)
|
|
x = torch.bmm(x, self.W_UV)
|
|
# # Convert from (N, B, V) to (B, N * V)
|
|
x = x.transpose(0, 1).reshape(-1, self.num_heads * self.v_head_dim)
|
|
return x
|
|
|
|
# Return `ql_nope`, `q_pe`
|
|
def _q_proj_and_k_up_proj(self, x):
|
|
q_nope, q_pe = self.q_proj(x)[0]\
|
|
.view(-1, self.num_heads, self.qk_head_dim)\
|
|
.split([self.qk_nope_head_dim, self.qk_rope_head_dim], dim=-1)
|
|
|
|
# Convert from (B, N, P) to (N, B, P)
|
|
q_nope = q_nope.transpose(0, 1)
|
|
# Multiply (N, B, P) x (N, P, L) -> (N, B, L)
|
|
ql_nope = torch.bmm(q_nope, self.W_UK_T)
|
|
# Convert from (N, B, L) to (B, N, L)
|
|
return ql_nope.transpose(0, 1), q_pe
|
|
|
|
def process_weights_after_loading(self, act_dtype: torch.dtype):
|
|
|
|
def get_layer_weight(layer):
|
|
WEIGHT_NAMES = ("weight", "qweight", "weight_packed")
|
|
for attr in WEIGHT_NAMES:
|
|
if hasattr(layer, attr):
|
|
return getattr(layer, attr)
|
|
raise AttributeError(
|
|
f"Layer '{layer}' has no recognized weight attribute:"
|
|
f" {WEIGHT_NAMES}.")
|
|
|
|
def get_and_maybe_dequant_weights(layer: LinearBase):
|
|
if not isinstance(layer.quant_method, UnquantizedLinearMethod):
|
|
# NOTE: This should only be used offline, since it's O(N^3)
|
|
eye = torch.eye(layer.input_size_per_partition,
|
|
dtype=act_dtype,
|
|
device=get_layer_weight(layer).device)
|
|
dequant_weights = layer.quant_method.apply(layer,
|
|
eye,
|
|
bias=None)
|
|
del eye
|
|
# standardize to (output, input)
|
|
return dequant_weights.T
|
|
# Weight will be reshaped next. To be on the safe side, the format
|
|
# of the weight should be reverted to FRACTAL_AND.
|
|
layer.weight.data = torch_npu.npu_format_cast(
|
|
layer.weight.data, ACL_FORMAT_FRACTAL_ND)
|
|
return layer.weight
|
|
|
|
# we currently do not have quantized bmm's which are needed for
|
|
# `W_UV` and `W_UK_T`, we we just store fp16/bf16 copies and perform
|
|
# the bmm's in 16-bit, the extra memory overhead of this is fairly low
|
|
kv_b_proj_weight = get_and_maybe_dequant_weights(self.kv_b_proj).T
|
|
assert kv_b_proj_weight.shape == (
|
|
self.kv_lora_rank,
|
|
self.num_heads * (self.qk_nope_head_dim + self.v_head_dim)), (
|
|
f"{kv_b_proj_weight.shape=}, "
|
|
f"{self.kv_lora_rank=}, "
|
|
f"{self.num_heads=}, "
|
|
f"{self.qk_nope_head_dim=}, "
|
|
f"{self.v_head_dim=}")
|
|
kv_b_proj_weight = kv_b_proj_weight.view(
|
|
self.kv_lora_rank,
|
|
self.num_heads,
|
|
self.qk_nope_head_dim + self.v_head_dim,
|
|
)
|
|
|
|
W_UK, W_UV = kv_b_proj_weight.split(
|
|
[self.qk_nope_head_dim, self.v_head_dim], dim=-1)
|
|
|
|
# Convert from (L, N, V) to (N, L, V)
|
|
self.W_UV = W_UV.transpose(0, 1).contiguous()
|
|
# Convert from (L, N, P) to (N, P, L)
|
|
self.W_UK_T = W_UK.permute(1, 2, 0).contiguous()
|
|
|
|
# Function `get_and_maybe_dequant_weights` will cast the weights to
|
|
# FRACTAL_AND. So we need to cast to FRACTAL_NZ again.
|
|
if is_enable_nz():
|
|
self.kv_b_proj.weight.data = torch_npu.npu_format_cast(
|
|
self.kv_b_proj.weight.data, ACL_FORMAT_FRACTAL_NZ)
|
|
|
|
# Waiting for BMM NZ support
|
|
# self.W_UV.data = torch_npu.npu_format_cast(self.W_UV.data, 29)
|
|
# self.W_UK_T.data = torch_npu.npu_format_cast(self.W_UK_T.data, 29)
|
|
|
|
# Currently mlapo only supports W8A8 quantization in MLA scenario
|
|
# TODO(whx): modify this limitation when mlapo supports floating point
|
|
if self.fused_qkv_a_proj is None or not isinstance(
|
|
getattr(self.fused_qkv_a_proj.quant_method, 'quant_method',
|
|
None), AscendW8A8LinearMethod):
|
|
self.enable_mlapo = False
|
|
logger.warning_once(
|
|
"Currently mlapo only supports W8A8 quantization in MLA scenario."
|
|
"Some layers in your model are not quantized with W8A8,"
|
|
"thus mlapo is disabled for these layers.")
|
|
if self.enable_mlapo:
|
|
self._process_weights_for_fused_mlapo(act_dtype)
|
|
|
|
def _process_weights_for_fused_mlapo(self, act_dtype: torch.dtype):
|
|
kv_a_proj_wt = self.fused_qkv_a_proj.weight.data[
|
|
..., self.q_lora_rank:].contiguous()
|
|
q_a_proj_wt = self.fused_qkv_a_proj.weight.data[
|
|
..., :self.q_lora_rank].contiguous()
|
|
kv_a_proj_wt = kv_a_proj_wt.contiguous()
|
|
kv_a_proj_wt = trans_rope_weight(kv_a_proj_wt, self.qk_rope_head_dim)
|
|
kv_a_proj_wt = kv_a_proj_wt.contiguous()
|
|
wd_qkv = torch.cat((kv_a_proj_wt, q_a_proj_wt), dim=-1)
|
|
wd_qkv = wd_qkv.t().contiguous()
|
|
wd_qkv = transdata(wd_qkv,
|
|
block_size=(16, 32)).unsqueeze(0).contiguous()
|
|
self.wd_qkv = torch_npu.npu_format_cast(wd_qkv, 29)
|
|
|
|
kv_a_proj_deq_scl = self.fused_qkv_a_proj.deq_scale[
|
|
self.q_lora_rank:].contiguous()
|
|
q_a_proj_deq_scl = self.fused_qkv_a_proj.deq_scale[:self.
|
|
q_lora_rank].contiguous(
|
|
)
|
|
kv_a_proj_deq_scl = kv_a_proj_deq_scl.reshape(
|
|
self.kv_lora_rank + self.qk_rope_head_dim, -1).contiguous()
|
|
kv_a_proj_deq_scl = trans_rope_weight(kv_a_proj_deq_scl,
|
|
self.qk_rope_head_dim)
|
|
kv_a_proj_deq_scl = kv_a_proj_deq_scl.view(
|
|
self.kv_lora_rank + self.qk_rope_head_dim).contiguous()
|
|
self.deq_scale_qkv = torch.cat((kv_a_proj_deq_scl, q_a_proj_deq_scl),
|
|
dim=-1).contiguous()
|
|
|
|
kv_a_proj_qt_bias = self.fused_qkv_a_proj.quant_bias[
|
|
self.q_lora_rank:].contiguous()
|
|
q_a_proj_qt_bias = self.fused_qkv_a_proj.quant_bias[:self.
|
|
q_lora_rank].contiguous(
|
|
)
|
|
kv_a_proj_qt_bias = kv_a_proj_qt_bias.reshape(
|
|
self.kv_lora_rank + self.qk_rope_head_dim, -1).contiguous()
|
|
kv_a_proj_qt_bias = trans_rope_weight(kv_a_proj_qt_bias,
|
|
self.qk_rope_head_dim)
|
|
kv_a_proj_qt_bias = kv_a_proj_qt_bias.view(
|
|
self.kv_lora_rank + self.qk_rope_head_dim).contiguous()
|
|
self.quant_bias_qkv = torch.cat((kv_a_proj_qt_bias, q_a_proj_qt_bias),
|
|
dim=-1).contiguous()
|
|
|
|
wu_q = self.q_proj.weight.data
|
|
wu_q = wu_q.t().reshape(self.num_heads,
|
|
self.qk_nope_head_dim + self.qk_rope_head_dim,
|
|
-1)
|
|
wu_q = trans_rope_weight(wu_q, self.qk_rope_head_dim)
|
|
wu_q = wu_q.reshape(
|
|
self.num_heads * (self.qk_nope_head_dim + self.qk_rope_head_dim),
|
|
-1)
|
|
wu_q = transdata(wu_q, block_size=(16, 32)).unsqueeze(0).contiguous()
|
|
self.wu_q = torch_npu.npu_format_cast(wu_q, 29)
|
|
|
|
qb_deq_scl = self.q_proj.deq_scale.data
|
|
qb_deq_scl = qb_deq_scl.reshape(
|
|
self.num_heads, self.qk_nope_head_dim + self.qk_rope_head_dim, -1)
|
|
qb_deq_scl = trans_rope_weight(qb_deq_scl, self.qk_rope_head_dim)
|
|
self.qb_deq_scl = qb_deq_scl.reshape(
|
|
self.num_heads * (self.qk_nope_head_dim + self.qk_rope_head_dim))
|
|
|
|
qb_qt_bias = self.q_proj.quant_bias.data
|
|
qb_qt_bias = qb_qt_bias.reshape(
|
|
self.num_heads, self.qk_nope_head_dim + self.qk_rope_head_dim, -1)
|
|
qb_qt_bias = trans_rope_weight(qb_qt_bias, self.qk_rope_head_dim)
|
|
self.qb_qt_bias = qb_qt_bias.reshape(
|
|
self.num_heads * (self.qk_nope_head_dim + self.qk_rope_head_dim))
|
|
|
|
device = self.q_proj.weight.device
|
|
self.gamma1 = self.q_a_layernorm.weight.data
|
|
self.beta1 = self.q_a_layernorm.bias.data
|
|
self.gamma2 = self.kv_a_layernorm.weight.data
|
|
self.quant_scale0 = self.fused_qkv_a_proj.input_scale.data
|
|
self.quant_offset0 = self.fused_qkv_a_proj.input_offset.data
|
|
self.quant_scale1 = self.q_proj.input_scale.data
|
|
self.quant_offset1 = self.q_proj.input_offset.data
|
|
self.ctkv_scale = torch.tensor([1], dtype=act_dtype, device=device)
|
|
self.q_nope_scale = torch.tensor([1], dtype=act_dtype, device=device)
|
|
|
|
def _compute_prefill_context(
|
|
self,
|
|
q_nope: torch.Tensor,
|
|
q_pe: torch.Tensor,
|
|
kv_c_and_k_pe_cache: Tuple[torch.Tensor],
|
|
rope_dim: int,
|
|
attn_metadata: AscendMLAMetadata,
|
|
prefix_output: torch.Tensor,
|
|
prefix_lse: torch.Tensor,
|
|
):
|
|
assert len(kv_c_and_k_pe_cache) > 1
|
|
prefill_metadata = attn_metadata.prefill
|
|
if prefill_metadata is None or prefill_metadata.chunked_context is None:
|
|
return prefix_output, prefix_lse
|
|
|
|
iters = len(prefill_metadata.chunked_context.seq_tot)
|
|
|
|
seq_len1 = torch.tensor(prefill_metadata.query_lens, dtype=torch.int32)
|
|
cache_kv_c = kv_c_and_k_pe_cache[0]
|
|
cache_k_pe = kv_c_and_k_pe_cache[1]
|
|
num_heads = cache_k_pe.size(2)
|
|
latent_kv_dim = kv_c_and_k_pe_cache[0].size(-1)
|
|
for i in range(iters):
|
|
toks = prefill_metadata.chunked_context.seq_tot[i]
|
|
|
|
seq_len2 = prefill_metadata.chunked_context.chunk_seq_lens[i]
|
|
seq_len = torch.stack([seq_len1, seq_len2])
|
|
kv_c_normed = torch.empty(toks,
|
|
num_heads,
|
|
latent_kv_dim,
|
|
dtype=q_nope.dtype,
|
|
device=q_nope.device)
|
|
k_pe = torch.empty(toks,
|
|
num_heads,
|
|
rope_dim,
|
|
dtype=q_nope.dtype,
|
|
device=q_nope.device)
|
|
|
|
torch_npu.atb.npu_paged_cache_load(
|
|
cache_kv_c,
|
|
cache_k_pe,
|
|
prefill_metadata.block_table,
|
|
seq_len2.to(q_nope.device),
|
|
seq_starts=prefill_metadata.chunked_context.starts[i],
|
|
key=kv_c_normed,
|
|
value=k_pe,
|
|
)
|
|
|
|
kv_c_normed = kv_c_normed.squeeze()
|
|
kv_nope = self.kv_b_proj(kv_c_normed)[0].view( \
|
|
-1, self.num_heads, self.qk_nope_head_dim + self.v_head_dim)
|
|
k_nope, v = kv_nope\
|
|
.split([self.qk_nope_head_dim, self.v_head_dim], dim=-1)
|
|
k_pe = k_pe.expand((*k_nope.shape[:-1], -1))
|
|
torch_npu.atb.npu_ring_mla(
|
|
q_nope=q_nope,
|
|
q_rope=q_pe,
|
|
k_nope=k_nope,
|
|
k_rope=k_pe,
|
|
value=v,
|
|
mask=self.prefill_mask,
|
|
seqlen=seq_len,
|
|
head_num=self.num_heads,
|
|
kv_head_num=self.num_heads,
|
|
pre_out=prefix_output,
|
|
prev_lse=prefix_lse,
|
|
qk_scale=self.scale,
|
|
kernel_type="kernel_type_high_precision",
|
|
mask_type="no_mask",
|
|
input_layout="type_bsnd",
|
|
calc_type="calc_type_default",
|
|
output=prefix_output,
|
|
softmax_lse=prefix_lse)
|
|
return prefix_output, prefix_lse
|
|
|
|
def _forward_prefill(
|
|
self,
|
|
q_nope: torch.Tensor,
|
|
q_pe: torch.Tensor,
|
|
k_nope: torch.Tensor,
|
|
k_pe: torch.Tensor,
|
|
value: torch.Tensor,
|
|
kv_c_and_k_pe_cache: Tuple[torch.Tensor],
|
|
attn_metadata: AscendMLAMetadata,
|
|
) -> torch.Tensor:
|
|
assert attn_metadata.prefill is not None
|
|
assert len(kv_c_and_k_pe_cache) > 1
|
|
num_tokens = q_nope.size(0)
|
|
attn_output = torch.empty(num_tokens,
|
|
self.num_heads,
|
|
self.v_head_dim,
|
|
dtype=q_nope.dtype,
|
|
device=q_nope.device)
|
|
attn_lse = torch.empty(self.num_heads,
|
|
num_tokens,
|
|
dtype=torch.float32,
|
|
device=q_nope.device)
|
|
if self.prefill_mask is None:
|
|
if q_nope.dtype == torch.float16:
|
|
mask_value = torch.finfo(torch.float32).min
|
|
else:
|
|
mask_value = 1
|
|
prefill_mask = torch.triu(
|
|
torch.ones(self.ring_mla_mask_size,
|
|
self.ring_mla_mask_size,
|
|
device=q_nope.device,
|
|
dtype=q_nope.dtype), 1)
|
|
self.prefill_mask = torch.where(prefill_mask == 1, mask_value,
|
|
0).to(q_nope.dtype)
|
|
torch_npu.atb.npu_ring_mla(q_nope=q_nope,
|
|
q_rope=q_pe,
|
|
k_nope=k_nope,
|
|
k_rope=k_pe,
|
|
value=value,
|
|
mask=self.prefill_mask,
|
|
seqlen=attn_metadata.prefill.query_lens,
|
|
head_num=self.num_heads,
|
|
kv_head_num=self.num_heads,
|
|
pre_out=None,
|
|
prev_lse=None,
|
|
qk_scale=self.scale,
|
|
kernel_type="kernel_type_high_precision",
|
|
mask_type="mask_type_triu",
|
|
input_layout="type_bsnd",
|
|
calc_type="calc_type_first_ring",
|
|
output=attn_output,
|
|
softmax_lse=attn_lse)
|
|
attn_output, attn_lse = self._compute_prefill_context( \
|
|
q_nope, q_pe, kv_c_and_k_pe_cache, self.qk_rope_head_dim, attn_metadata, attn_output, attn_lse)
|
|
|
|
attn_output = attn_output.reshape(
|
|
[num_tokens, self.num_heads * self.v_head_dim])
|
|
return attn_output
|
|
|
|
def exec_kv_decode(
|
|
self,
|
|
kv_no_split: torch.Tensor,
|
|
cos: torch.Tensor,
|
|
sin: torch.Tensor,
|
|
kv_cache: Tuple,
|
|
slots: torch.Tensor,
|
|
):
|
|
B = kv_no_split.shape[0]
|
|
N = self.num_kv_heads
|
|
S = 1
|
|
# npu_kv_rmsnorm_rope_cache needs [B, N, S, D]
|
|
kv_no_split = kv_no_split.view(
|
|
B, N, S, self.kv_lora_rank + self.qk_rope_head_dim)
|
|
cache_mode = "PA_NZ" if self.enable_kv_nz else "PA"
|
|
k_pe, k_nope, _, _ = torch_npu.npu_kv_rmsnorm_rope_cache(
|
|
kv_no_split,
|
|
self.kv_a_layernorm.weight,
|
|
cos,
|
|
sin,
|
|
slots.to(torch.int64),
|
|
kv_cache[1],
|
|
kv_cache[0],
|
|
epsilon=self.kv_a_layernorm.variance_epsilon,
|
|
cache_mode=cache_mode,
|
|
)
|
|
return k_pe, k_nope
|
|
|
|
def exec_kv_prefill(
|
|
self,
|
|
kv_no_split: torch.Tensor,
|
|
cos: torch.Tensor,
|
|
sin: torch.Tensor,
|
|
kv_cache: Tuple,
|
|
slots: torch.Tensor,
|
|
):
|
|
B = kv_no_split.shape[0]
|
|
N = self.num_kv_heads
|
|
S = 1
|
|
# npu_kv_rmsnorm_rope_cache needs [B, N, S, D]
|
|
kv_no_split = kv_no_split.view(
|
|
B, N, S, self.kv_lora_rank + self.qk_rope_head_dim)
|
|
cache_mode = "PA_NZ" if self.enable_kv_nz else "PA"
|
|
_, _, k_pe, k_nope = torch_npu.npu_kv_rmsnorm_rope_cache(
|
|
kv_no_split,
|
|
self.kv_a_layernorm.weight,
|
|
cos,
|
|
sin,
|
|
slots.to(torch.int64),
|
|
kv_cache[1],
|
|
kv_cache[0],
|
|
epsilon=self.kv_a_layernorm.variance_epsilon,
|
|
cache_mode=cache_mode,
|
|
is_output_kv=True,
|
|
)
|
|
return k_pe, k_nope
|
|
|
|
def rope_single(
|
|
self,
|
|
x: torch.Tensor,
|
|
cos: torch.Tensor,
|
|
sin: torch.Tensor,
|
|
) -> torch.Tensor:
|
|
B, N, D = x.shape
|
|
S = 1
|
|
x = x.view(B, N, S, D)
|
|
x = torch_npu.npu_interleave_rope(x, cos, sin)
|
|
return x.view(B, N, D)
|
|
|
|
def _forward_decode(
|
|
self,
|
|
q_nope: torch.Tensor,
|
|
q_pe: torch.Tensor,
|
|
k_nope: torch.Tensor,
|
|
k_pe: torch.Tensor,
|
|
block_size: int,
|
|
attn_metadata: AscendMLAMetadata,
|
|
) -> torch.Tensor:
|
|
decode_meta = attn_metadata.decode
|
|
assert decode_meta is not None
|
|
num_tokens = q_nope.size(0)
|
|
# shape of knope/k_pe for npu graph mode should be:
|
|
# [num_blocks, num_kv_heads, block_size, self.kv_lora_rank/self.qk_rope_head_dim]
|
|
actual_seq_lengths = None
|
|
if self.enable_kv_nz:
|
|
k_nope = k_nope.view(-1, self.num_kv_heads,
|
|
self.kv_lora_rank // 16, block_size, 16)
|
|
k_pe = k_pe.view(-1, self.num_kv_heads,
|
|
self.qk_rope_head_dim // 16, block_size, 16)
|
|
input_layout = "BSND"
|
|
else:
|
|
k_nope = k_nope.view(-1, self.num_kv_heads, block_size,
|
|
self.kv_lora_rank)
|
|
k_pe = k_pe.view(-1, self.num_kv_heads, block_size,
|
|
self.qk_rope_head_dim)
|
|
input_layout = "BNSD"
|
|
|
|
if attn_metadata.attn_state in [
|
|
AscendAttentionState.SpecDecoding,
|
|
AscendAttentionState.ChunkedPrefill,
|
|
AscendAttentionState.DecodeOnly,
|
|
] and self.speculative_config is not None:
|
|
# Use TND layout for pure SpecDecoding and SpecDecoding in ChunkedPrefill
|
|
input_layout = "TND"
|
|
# [bs * q_seq_len, num_heads_per_rank, dim]
|
|
# TODO: If the driver is upgraded later, the contiguous function can be deleted.
|
|
q_nope = q_nope.view(num_tokens, self.num_heads, -1).contiguous()
|
|
q_pe = q_pe.view(num_tokens, self.num_heads, -1)
|
|
sparse_mode = 3
|
|
spec_attn_mask = attn_metadata.decode.attn_mask # type:ignore
|
|
actual_seq_lengths = decode_meta.actual_seq_lengths_q
|
|
else:
|
|
if self.enable_kv_nz:
|
|
q_nope = q_nope.view(num_tokens, 1, self.num_heads,
|
|
-1).contiguous()
|
|
q_pe = q_pe.view(num_tokens, 1, self.num_heads, -1)
|
|
else:
|
|
q_nope = q_nope.view(num_tokens, self.num_heads, 1,
|
|
-1).contiguous()
|
|
q_pe = q_pe.view(num_tokens, self.num_heads, 1, -1)
|
|
sparse_mode = 0
|
|
spec_attn_mask = None
|
|
|
|
common_kwargs = {
|
|
'query_rope': q_pe,
|
|
'key_rope': k_pe,
|
|
'num_heads': self.num_heads,
|
|
'num_key_value_heads': self.num_kv_heads,
|
|
'input_layout': input_layout,
|
|
'atten_mask': spec_attn_mask,
|
|
'sparse_mode': sparse_mode,
|
|
'scale': self.scale,
|
|
'antiquant_mode': 0,
|
|
'antiquant_scale': None,
|
|
'block_table': decode_meta.block_table,
|
|
'block_size': block_size,
|
|
"actual_seq_lengths": actual_seq_lengths,
|
|
"actual_seq_lengths_kv": decode_meta.seq_lens_list,
|
|
}
|
|
graph_params = get_graph_params()
|
|
forward_context: ForwardContext = get_forward_context()
|
|
if forward_context.capturing:
|
|
stream = torch_npu.npu.current_stream()
|
|
|
|
event = torch.npu.ExternalEvent()
|
|
event.wait(stream)
|
|
event.reset(stream)
|
|
graph_params.events[num_tokens].append(event)
|
|
|
|
workspace = graph_params.workspaces.get(num_tokens)
|
|
if workspace is None:
|
|
workspace = torch_npu._npu_fused_infer_attention_score_get_max_workspace(
|
|
q_nope, k_nope, k_nope, **common_kwargs)
|
|
update_graph_params_workspaces(num_tokens,
|
|
weak_ref_tensors(workspace))
|
|
|
|
attn_output = torch.empty_like(q_nope)
|
|
softmax_lse = torch.empty(num_tokens,
|
|
dtype=q_nope.dtype,
|
|
device=q_nope.device)
|
|
|
|
graph_params.attn_params[num_tokens].append(
|
|
(weak_ref_tensors(q_nope), weak_ref_tensors(k_nope),
|
|
weak_ref_tensors(q_pe), weak_ref_tensors(k_pe),
|
|
self.num_heads, self.num_kv_heads, input_layout,
|
|
weak_ref_tensors(spec_attn_mask) if spec_attn_mask is not None
|
|
else None, sparse_mode, self.scale, decode_meta.block_table,
|
|
block_size, decode_meta.seq_lens_list, actual_seq_lengths,
|
|
weak_ref_tensors(attn_output), weak_ref_tensors(softmax_lse)))
|
|
|
|
torch.npu.graph_task_group_begin(stream)
|
|
torch_npu.npu_fused_infer_attention_score.out(
|
|
q_nope,
|
|
k_nope,
|
|
k_nope,
|
|
**common_kwargs,
|
|
workspace=workspace,
|
|
out=[attn_output, softmax_lse])
|
|
handle = torch.npu.graph_task_group_end(stream)
|
|
graph_params.handles[num_tokens].append(handle)
|
|
else:
|
|
attn_output, _ = torch_npu.npu_fused_infer_attention_score(
|
|
q_nope, k_nope, k_nope, **common_kwargs)
|
|
|
|
current_ms_metadata = get_multistream_comm_context()
|
|
if current_ms_metadata is None:
|
|
return self._v_up_proj(attn_output)
|
|
else:
|
|
current_ms_metadata.before_comm_event.record()
|
|
with torch.npu.stream(current_ms_metadata.comm_stream):
|
|
current_ms_metadata.before_comm_event.wait()
|
|
return self._v_up_proj(attn_output)
|
|
|
|
def _mla_decode_preprocess(self, hidden_states, kv_cache, attn_metadata):
|
|
bsz = attn_metadata.num_decode_tokens
|
|
hidden_states = hidden_states[:bsz]
|
|
|
|
cos_shape = attn_metadata.decode.cos.shape
|
|
cos = attn_metadata.decode.cos.view(cos_shape[0], cos_shape[-1])
|
|
sin = attn_metadata.decode.sin.view(cos_shape[0], cos_shape[-1])
|
|
|
|
decode_k_nope, decode_k_pe = kv_cache[0], kv_cache[1]
|
|
decode_q_nope = torch.empty(
|
|
(hidden_states.shape[0], self.W_UK_T.shape[0],
|
|
decode_k_nope.shape[-1]),
|
|
dtype=hidden_states.dtype,
|
|
device=hidden_states.device,
|
|
)
|
|
decode_q_pe = torch.empty(
|
|
(hidden_states.shape[0], self.W_UK_T.shape[0],
|
|
decode_k_pe.shape[-1]),
|
|
dtype=hidden_states.dtype,
|
|
device=hidden_states.device,
|
|
)
|
|
|
|
torch.ops._C_ascend.mla_preprocess(
|
|
hidden_states,
|
|
self.wd_qkv,
|
|
self.deq_scale_qkv,
|
|
self.gamma1,
|
|
self.beta1,
|
|
self.wu_q,
|
|
self.qb_deq_scl,
|
|
self.gamma2,
|
|
cos,
|
|
sin,
|
|
self.W_UK_T,
|
|
decode_k_nope,
|
|
decode_k_pe,
|
|
attn_metadata.slot_mapping[:bsz].flatten(),
|
|
quant_scale0=self.quant_scale0,
|
|
quant_offset0=self.quant_offset0,
|
|
bias0=self.quant_bias_qkv,
|
|
quant_scale1=self.quant_scale1,
|
|
quant_offset1=self.quant_offset1,
|
|
bias1=self.qb_qt_bias,
|
|
ctkv_scale=self.ctkv_scale,
|
|
q_nope_scale=self.q_nope_scale,
|
|
cache_mode="krope_ctkv",
|
|
quant_mode="per_tensor_quant_asymm",
|
|
q_out0=decode_q_nope,
|
|
kv_cache_out0=decode_k_nope,
|
|
q_out1=decode_q_pe,
|
|
kv_cache_out1=decode_k_pe,
|
|
)
|
|
decode_q_nope = decode_q_nope.view(bsz, self.num_heads,
|
|
self.kv_lora_rank)
|
|
decode_q_pe = decode_q_pe.view(bsz, self.num_heads, -1)
|
|
|
|
decode_preprocess_res = DecodeMLAPreprocessResult(
|
|
decode_q_nope, decode_q_pe, decode_k_nope, decode_k_pe)
|
|
return decode_preprocess_res, None
|
|
|
|
def _mla_preprocess(self, layer_name, hidden_states, kv_cache,
|
|
attn_metadata, need_gather_q_kv):
|
|
# MLA Preprocess:
|
|
# 1. Perform q_a_proj and q_a_layernorm to obtain q_c
|
|
# 2. Perform kv_a_proj_with_mqa to obtain kv_no_split
|
|
# 3. If need_gather_q_kv, perform all_gather.
|
|
# 4. Preprocess decode tokens, write kv cache and get:
|
|
# decode_ql_nope, decode_q_pe, decode_k_pe, decode_k_nope
|
|
# 5. Preprocess prefill tokens, write kv cache and get:
|
|
# prefill_q_nope, prefill_q_pe, prefill_k_nope, prefill_k_pe, prefill_value
|
|
has_decode = attn_metadata.num_decodes > 0
|
|
has_prefill = attn_metadata.num_prefills > 0
|
|
num_decode_tokens = attn_metadata.num_decode_tokens
|
|
num_actual_tokens = attn_metadata.num_actual_tokens
|
|
if self.fused_qkv_a_proj is not None:
|
|
maybe_npu_prefetch(inputs=self.fused_qkv_a_proj.weight,
|
|
dependency=hidden_states,
|
|
enabled=self.enable_prefetch)
|
|
qkv_lora = self.fused_qkv_a_proj(hidden_states)[0]
|
|
q_c, kv_no_split = qkv_lora.split(
|
|
[self.q_lora_rank, self.kv_lora_rank + self.qk_rope_head_dim],
|
|
dim=-1,
|
|
)
|
|
q_c = self.q_a_layernorm(q_c)
|
|
else:
|
|
q_c = hidden_states
|
|
kv_no_split = self.kv_a_proj_with_mqa(hidden_states)[0]
|
|
|
|
# Process for Flash Comm V1
|
|
q_c = torch.ops.vllm.maybe_all_gather_and_maybe_unpad(
|
|
q_c, need_gather_q_kv)
|
|
kv_no_split = torch.ops.vllm.maybe_all_gather_and_maybe_unpad(
|
|
kv_no_split, need_gather_q_kv)
|
|
|
|
decode_preprocess_res = None
|
|
prefill_preprocess_res = None
|
|
if has_prefill:
|
|
wait_for_kv_layer_from_connector(layer_name)
|
|
# Preprocess for decode tokens
|
|
if has_decode:
|
|
decode_q_c = q_c[:num_decode_tokens]
|
|
cos = attn_metadata.decode.cos
|
|
sin = attn_metadata.decode.sin
|
|
decode_ql_nope, decode_q_pe = \
|
|
self._q_proj_and_k_up_proj(decode_q_c)
|
|
decode_q_pe = self.rope_single(decode_q_pe, cos, sin)
|
|
decode_slots = attn_metadata.slot_mapping[:num_decode_tokens]
|
|
decode_kv_no_split = kv_no_split[:num_decode_tokens]
|
|
decode_k_pe, decode_k_nope = self.exec_kv_decode(
|
|
decode_kv_no_split, cos, sin, kv_cache, decode_slots)
|
|
decode_preprocess_res = DecodeMLAPreprocessResult(
|
|
decode_ql_nope, decode_q_pe, decode_k_nope, decode_k_pe)
|
|
# Preprocess for prefill tokens
|
|
if has_prefill:
|
|
prefill_kv_no_split = kv_no_split[
|
|
num_decode_tokens:num_actual_tokens]
|
|
prefill_q_c = q_c[num_decode_tokens:num_actual_tokens]
|
|
prefill_q = self.q_proj(prefill_q_c)[0]\
|
|
.view(-1, self.num_heads, self.qk_head_dim)
|
|
prefill_q_pe = prefill_q[..., self.qk_nope_head_dim:]
|
|
prefill_q_nope = prefill_q[..., :self.qk_nope_head_dim]
|
|
cos = attn_metadata.prefill.cos
|
|
sin = attn_metadata.prefill.sin
|
|
prefill_slots = attn_metadata.slot_mapping[
|
|
num_decode_tokens:num_actual_tokens]
|
|
prefill_q_pe = self.rope_single(prefill_q_pe, cos, sin)
|
|
prefill_k_pe, prefill_k_c_normed = self.exec_kv_prefill(
|
|
prefill_kv_no_split, cos, sin, kv_cache, prefill_slots)
|
|
prefill_k_pe = prefill_k_pe.view(prefill_q_c.shape[0],
|
|
self.num_kv_heads, -1)
|
|
prefill_k_nope, prefill_value = self.kv_b_proj(
|
|
prefill_k_c_normed)[0].view(
|
|
-1, self.num_heads,
|
|
self.qk_nope_head_dim + self.v_head_dim).split(
|
|
[self.qk_nope_head_dim, self.v_head_dim], dim=-1)
|
|
prefill_k_pe = prefill_k_pe.expand(
|
|
(*prefill_k_nope.shape[:-1], -1))
|
|
prefill_preprocess_res = PrefillMLAPreprocessResult(
|
|
prefill_q_nope, prefill_q_pe, prefill_k_nope, prefill_k_pe,
|
|
prefill_value)
|
|
return decode_preprocess_res, prefill_preprocess_res
|
|
|
|
def forward(
|
|
self,
|
|
layer_name,
|
|
hidden_states: torch.Tensor, # query in unified attn
|
|
kv_cache: Tuple[torch.Tensor],
|
|
attn_metadata: M,
|
|
need_gather_q_kv: bool = False,
|
|
output: Optional[torch.Tensor] = None,
|
|
) -> torch.Tensor:
|
|
assert output is not None, "Output tensor must be provided."
|
|
if attn_metadata is None:
|
|
# Profiling run.
|
|
return output.fill_(0)
|
|
num_actual_tokens = attn_metadata.num_actual_tokens
|
|
assert attn_metadata.num_decodes is not None and \
|
|
attn_metadata.num_prefills is not None and \
|
|
attn_metadata.num_decode_tokens is not None
|
|
num_decode_tokens = attn_metadata.num_decode_tokens
|
|
# Inputs and outputs may be padded for CUDA graphs
|
|
output_padded = output
|
|
o_proj_input_shape = (get_forward_context().num_tokens,
|
|
self.num_heads * self.v_head_dim)
|
|
o_proj_input = torch.empty(o_proj_input_shape,
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|
dtype=hidden_states.dtype,
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|
device=hidden_states.device)
|
|
|
|
# MLA Preprocess
|
|
forward_context = get_forward_context()
|
|
if (self.enable_mlapo and
|
|
(attn_metadata is None or not forward_context.with_prefill)):
|
|
decode_preprocess_res, prefill_preprocess_res = self._mla_decode_preprocess(
|
|
hidden_states, kv_cache, attn_metadata)
|
|
else:
|
|
decode_preprocess_res, prefill_preprocess_res = self._mla_preprocess(
|
|
layer_name, hidden_states, kv_cache, attn_metadata,
|
|
need_gather_q_kv)
|
|
|
|
if decode_preprocess_res is not None:
|
|
# MLA Preprocess for decoding
|
|
output_decode = self._forward_decode(decode_preprocess_res.ql_nope,
|
|
decode_preprocess_res.q_pe,
|
|
decode_preprocess_res.k_nope,
|
|
decode_preprocess_res.k_pe,
|
|
kv_cache[0].shape[1],
|
|
attn_metadata)
|
|
current_ms_metadata = get_multistream_comm_context()
|
|
if current_ms_metadata is not None:
|
|
with torch.npu.stream(current_ms_metadata.comm_stream):
|
|
o_proj_input[:num_decode_tokens] = output_decode
|
|
current_ms_metadata.after_comm_event.record()
|
|
else:
|
|
o_proj_input[:num_decode_tokens] = output_decode
|
|
|
|
if prefill_preprocess_res is not None:
|
|
# FIX: aicore move should be also placed on the comm stream in dbo,
|
|
# otherwise it may affect the accuracy
|
|
# TODO: use an elegant way to overlap
|
|
output_prefill = self._forward_prefill(
|
|
prefill_preprocess_res.q_nope, prefill_preprocess_res.q_pe,
|
|
prefill_preprocess_res.k_nope, prefill_preprocess_res.k_pe,
|
|
prefill_preprocess_res.value, kv_cache, attn_metadata)
|
|
current_ms_metadata = get_multistream_comm_context()
|
|
if current_ms_metadata is not None:
|
|
with torch.npu.stream(current_ms_metadata.comm_stream):
|
|
o_proj_input[num_decode_tokens:] = output_prefill
|
|
current_ms_metadata.after_comm_event.record()
|
|
else:
|
|
o_proj_input[
|
|
num_decode_tokens:num_actual_tokens] = output_prefill
|
|
# O proj
|
|
current_ms_metadata = get_multistream_comm_context()
|
|
MAX_O_PROJ_PREFETCH_SIZE = 16 * 1024 * 1024
|
|
if current_ms_metadata is None:
|
|
maybe_npu_prefetch(inputs=self.o_proj.weight,
|
|
dependency=o_proj_input,
|
|
max_size=MAX_O_PROJ_PREFETCH_SIZE,
|
|
enabled=self.enable_prefetch)
|
|
|
|
output[...] = self.o_proj(o_proj_input,
|
|
is_prefill=prefill_preprocess_res
|
|
is not None)[0]
|
|
else:
|
|
with torch.npu.stream(current_ms_metadata.comm_stream):
|
|
maybe_npu_prefetch(inputs=self.o_proj.weight,
|
|
dependency=o_proj_input,
|
|
max_size=MAX_O_PROJ_PREFETCH_SIZE,
|
|
enabled=self.enable_prefetch)
|
|
output[...] = self.o_proj(o_proj_input,
|
|
is_prefill=prefill_preprocess_res
|
|
is not None)[0]
|
|
current_ms_metadata.after_comm_event.record()
|
|
del o_proj_input
|
|
|
|
has_prefill = attn_metadata.num_prefills > 0
|
|
if has_prefill:
|
|
maybe_save_kv_layer_to_connector(layer_name, list(kv_cache))
|
|
return output_padded
|