cf1b701afe
唯一改动: computility-run.yaml max_model_len 80000→100000 26e6cb40是Sub520能在竞赛平台docker build成功并得分的版本 之后所有commit都导致docker build失败 根因: 新增的65个文件(vendor_overrides/prebuilt/*.so/wheels等) 可能触发了竞赛平台docker build的某个限制 本次回退: - qwen3_6_scripts/: 110→45文件(删掉65个新增文件) - ex_engine/: 恢复到26e6cb40完全一致 - Dockerfile: 恢复5个RUN步骤结构(已验证能build) - computility-run.yaml: max_model_len=100000(避免replay 400拒绝)
280 lines
10 KiB
Python
280 lines
10 KiB
Python
"""
|
|
corex_fa2.py — FlashAttention2 dispatch for BI-V100
|
|
|
|
Comp 168 log shows THREE dispatch paths:
|
|
corex_fa2.py:333 → Using CoreX FA2 packed prefill: B=2 Hq=4 Hkv=1 D=256 max_q=2048 max_k=2048
|
|
corex_fa2.py:507 → Using CoreX paged FA2 chunked prefill: B=1 Hq=4 Hkv=1 D=256 max_q=17 cache_blocks=2
|
|
corex_fa2.py:225 → Using CoreX paged decode: B=1 Hq=4 Hkv=1 D=256 max_k=45455 partition=256
|
|
|
|
Dispatch priority (from upstream xllm ILU):
|
|
Tier 0: ix_bridge → ixformer::infer C++ functions (via ix_full_bridge.cpp)
|
|
Tier 1: ixformer.contrib.vllm_flash_attn Python wrappers (in base image)
|
|
Tier 2: ixformer.functions.vllm_single_query_cached_kv_attention (V1 paged)
|
|
"""
|
|
|
|
import logging
|
|
import torch
|
|
from typing import Optional, Tuple
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
# -----------------------------------------------------------------------
|
|
# ix_bridge (C++ bridge — Tier 0)
|
|
# -----------------------------------------------------------------------
|
|
_bridge = None
|
|
_bridge_available = False
|
|
|
|
def _ensure_bridge():
|
|
global _bridge, _bridge_available
|
|
if _bridge is not None:
|
|
return _bridge_available
|
|
try:
|
|
from ex_engine.python import ix_bridge
|
|
if ix_bridge.is_available():
|
|
_bridge = ix_bridge
|
|
_bridge_available = True
|
|
return True
|
|
except Exception:
|
|
pass
|
|
try:
|
|
from vllm.model_executor.models.ex_engine.python import ix_bridge
|
|
if ix_bridge.is_available():
|
|
_bridge = ix_bridge
|
|
_bridge_available = True
|
|
return True
|
|
except Exception:
|
|
pass
|
|
return False
|
|
|
|
# -----------------------------------------------------------------------
|
|
# ixformer Python-level backends (Tier 1/2)
|
|
# -----------------------------------------------------------------------
|
|
_flash_varlen_func = None
|
|
_flash_kvcache_func = None
|
|
_paged_attn_v1 = None
|
|
_ix_available = False
|
|
|
|
try:
|
|
from ixformer.contrib.vllm_flash_attn import (
|
|
flash_attn_varlen_func as _flash_varlen_func,
|
|
)
|
|
_ix_available = True
|
|
except ImportError:
|
|
pass
|
|
|
|
try:
|
|
from ixformer.contrib.vllm_flash_attn import (
|
|
flash_attn_with_kvcache as _flash_kvcache_func,
|
|
)
|
|
except ImportError:
|
|
pass
|
|
|
|
try:
|
|
import ixformer.functions as ixf_F
|
|
_paged_attn_v1 = ixf_F.vllm_single_query_cached_kv_attention
|
|
except (ImportError, AttributeError):
|
|
pass
|
|
|
|
# -----------------------------------------------------------------------
|
|
# Logging state
|
|
# -----------------------------------------------------------------------
|
|
_logged_packed_prefill = False
|
|
_logged_paged_chunked = False
|
|
_logged_paged_decode = False
|
|
|
|
|
|
# =========================================================================
|
|
# Mode 1: Packed Prefill (no KV cache, fresh sequences)
|
|
# =========================================================================
|
|
def fa2_packed_prefill(
|
|
query, key, value, cu_seqlens_q, cu_seqlens_k,
|
|
max_seqlen_q, max_seqlen_k,
|
|
softmax_scale=None, causal=True, window_size=(-1, -1),
|
|
):
|
|
global _logged_packed_prefill
|
|
batch_size = cu_seqlens_q.shape[0] - 1
|
|
num_heads = query.shape[1]
|
|
num_kv_heads = key.shape[1]
|
|
head_dim = query.shape[2]
|
|
if softmax_scale is None:
|
|
softmax_scale = head_dim ** -0.5
|
|
|
|
if not _logged_packed_prefill:
|
|
logger.info(
|
|
"Using CoreX FA2 packed prefill: B=%d Hq=%d Hkv=%d D=%d "
|
|
"max_q=%d max_k=%d",
|
|
batch_size, num_heads, num_kv_heads, head_dim,
|
|
max_seqlen_q, max_seqlen_k)
|
|
_logged_packed_prefill = True
|
|
|
|
# Tier 0: ix_bridge
|
|
if _ensure_bridge():
|
|
try:
|
|
output = torch.empty_like(query)
|
|
block_tables = torch.empty(0, dtype=torch.int32, device=query.device)
|
|
_bridge.flash_attn_prefill(
|
|
query, key, value, output, block_tables,
|
|
cu_seqlens_q, cu_seqlens_k,
|
|
max_seqlen_q, max_seqlen_k, softmax_scale, causal,
|
|
window_size[0], window_size[1])
|
|
return output
|
|
except Exception as e:
|
|
logger.debug("ix_bridge prefill failed: %s", e)
|
|
|
|
# Tier 1: ixformer Python
|
|
if _flash_varlen_func is not None:
|
|
return _flash_varlen_func(
|
|
q=query, k=key, v=value,
|
|
cu_seqlens_q=cu_seqlens_q, cu_seqlens_k=cu_seqlens_k,
|
|
max_seqlen_q=max_seqlen_q, max_seqlen_k=max_seqlen_k,
|
|
softmax_scale=softmax_scale, causal=causal,
|
|
window_size=window_size)
|
|
|
|
raise RuntimeError("CoreX FA2 packed prefill: no backend available")
|
|
|
|
|
|
# =========================================================================
|
|
# Mode 2: Paged Decode (single token per sequence, KV in block cache)
|
|
# =========================================================================
|
|
def fa2_paged_decode(
|
|
query, key_cache, value_cache, block_tables, cache_seqlens,
|
|
softmax_scale=None, head_mapping=None,
|
|
block_size=16, max_seq_len=0, alibi_slopes=None,
|
|
):
|
|
global _logged_paged_decode
|
|
batch_size = query.shape[0]
|
|
num_heads = query.shape[2] if query.dim() == 4 else query.shape[1]
|
|
head_dim = query.shape[-1]
|
|
if softmax_scale is None:
|
|
softmax_scale = head_dim ** -0.5
|
|
if max_seq_len == 0:
|
|
max_seq_len = int(cache_seqlens.max().item())
|
|
|
|
if not _logged_paged_decode:
|
|
num_kv_heads = key_cache.shape[1] if key_cache.dim() >= 3 else num_heads
|
|
logger.info(
|
|
"Using CoreX paged decode: B=%d Hq=%d Hkv=%d D=%d "
|
|
"max_k=%d partition=256",
|
|
batch_size, num_heads, num_kv_heads, head_dim, max_seq_len)
|
|
_logged_paged_decode = True
|
|
|
|
# Tier 0: ix_bridge → ixformer::infer::xllm_paged_attention
|
|
if _ensure_bridge():
|
|
try:
|
|
q_in = query.squeeze(1) if query.dim() == 4 else query
|
|
output = torch.empty_like(q_in)
|
|
num_kv_heads = key_cache.shape[1] if key_cache.dim() >= 3 else num_heads
|
|
_bridge.paged_attention(
|
|
output, q_in, key_cache, value_cache,
|
|
num_kv_heads, softmax_scale,
|
|
block_tables, cache_seqlens,
|
|
block_size, max_seq_len, alibi_slopes)
|
|
return output.unsqueeze(1) if query.dim() == 4 else output
|
|
except Exception as e:
|
|
logger.debug("ix_bridge paged_attention failed: %s", e)
|
|
|
|
# Tier 2: ixf_F.vllm_single_query_cached_kv_attention (V1)
|
|
if _paged_attn_v1 is not None and head_mapping is not None:
|
|
try:
|
|
q_in = query.squeeze(1) if query.dim() == 4 else query
|
|
output = torch.empty_like(q_in)
|
|
_paged_attn_v1(
|
|
output, q_in, key_cache, value_cache,
|
|
head_mapping, softmax_scale,
|
|
block_tables, cache_seqlens,
|
|
block_size, max_seq_len, alibi_slopes)
|
|
return output.unsqueeze(1) if query.dim() == 4 else output
|
|
except Exception as e:
|
|
logger.debug("V1 paged attention failed: %s", e)
|
|
|
|
# Tier 1: flash_attn_with_kvcache
|
|
if _flash_kvcache_func is not None:
|
|
try:
|
|
return _flash_kvcache_func(
|
|
q=query, k_cache=key_cache, v_cache=value_cache,
|
|
cache_seqlens=cache_seqlens, softmax_scale=softmax_scale,
|
|
causal=True, block_table=block_tables)
|
|
except Exception as e:
|
|
logger.debug("flash_attn_with_kvcache failed: %s", e)
|
|
|
|
raise RuntimeError("CoreX FA2 paged decode: no backend available")
|
|
|
|
|
|
# =========================================================================
|
|
# Mode 3: Paged Chunked Prefill
|
|
# =========================================================================
|
|
def fa2_paged_chunked_prefill(
|
|
query, key, value, key_cache, value_cache,
|
|
cu_seqlens_q, max_seqlen_q, block_tables, cache_seqlens,
|
|
softmax_scale=None, causal=True, window_size=(-1, -1), block_size=16,
|
|
):
|
|
global _logged_paged_chunked
|
|
batch_size = cu_seqlens_q.shape[0] - 1
|
|
num_heads = query.shape[1]
|
|
num_kv_heads = key.shape[1] if key is not None else num_heads
|
|
head_dim = query.shape[2]
|
|
if softmax_scale is None:
|
|
softmax_scale = head_dim ** -0.5
|
|
|
|
max_cache_blocks = 0
|
|
if block_tables is not None and block_tables.numel() > 0:
|
|
max_cache_blocks = (block_tables >= 0).sum(dim=-1).max().item()
|
|
|
|
if not _logged_paged_chunked:
|
|
logger.info(
|
|
"Using CoreX paged FA2 chunked prefill: B=%d Hq=%d Hkv=%d D=%d "
|
|
"max_q=%d cache_blocks=%d",
|
|
batch_size, num_heads, num_kv_heads, head_dim,
|
|
max_seqlen_q, max_cache_blocks)
|
|
_logged_paged_chunked = True
|
|
|
|
# Use varlen for chunked prefill
|
|
if _flash_varlen_func is not None:
|
|
try:
|
|
return _flash_varlen_func(
|
|
q=query, k=key, v=value,
|
|
cu_seqlens_q=cu_seqlens_q, cu_seqlens_k=cu_seqlens_q,
|
|
max_seqlen_q=max_seqlen_q, max_seqlen_k=max_seqlen_q,
|
|
softmax_scale=softmax_scale, causal=causal,
|
|
window_size=window_size)
|
|
except Exception as e:
|
|
logger.debug("FA2 chunked prefill via varlen failed: %s", e)
|
|
|
|
raise RuntimeError("CoreX FA2 chunked prefill: no backend available")
|
|
|
|
|
|
# =========================================================================
|
|
# Unified dispatch
|
|
# =========================================================================
|
|
class CoreXFA2:
|
|
def __init__(self, num_heads, num_kv_heads, head_dim):
|
|
self.num_heads = num_heads
|
|
self.num_kv_heads = num_kv_heads
|
|
self.head_dim = head_dim
|
|
self.scale = head_dim ** -0.5
|
|
self.available = _ix_available or _ensure_bridge()
|
|
|
|
@property
|
|
def is_available(self):
|
|
return self.available
|
|
|
|
def packed_prefill(self, query, key, value, cu_seqlens_q, cu_seqlens_k,
|
|
max_seqlen_q, max_seqlen_k, **kwargs):
|
|
return fa2_packed_prefill(
|
|
query, key, value, cu_seqlens_q, cu_seqlens_k,
|
|
max_seqlen_q, max_seqlen_k, softmax_scale=self.scale, **kwargs)
|
|
|
|
def paged_decode(self, query, key_cache, value_cache, block_tables,
|
|
cache_seqlens, **kwargs):
|
|
return fa2_paged_decode(
|
|
query, key_cache, value_cache, block_tables, cache_seqlens,
|
|
softmax_scale=self.scale, **kwargs)
|
|
|
|
def chunked_prefill(self, query, key, value, key_cache, value_cache,
|
|
cu_seqlens_q, max_seqlen_q, block_tables,
|
|
cache_seqlens, **kwargs):
|
|
return fa2_paged_chunked_prefill(
|
|
query, key, value, key_cache, value_cache,
|
|
cu_seqlens_q, max_seqlen_q, block_tables, cache_seqlens,
|
|
softmax_scale=self.scale, **kwargs)
|