EngineX-Hygon/sglang
5
0
Fork 0
Code Issues Pull Requests Actions 7 Projects Releases Wiki Activity

2x performance improvement for large prefill & Fix workspace conflicts (#579)

Browse Source
This commit is contained in:
Ying Sheng
2024-07-03 16:14:57 -07:00
committed by GitHub
parent 96c503eb60
commit 2a754e57b0
6 changed files with 88 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
python/sglang/srt/layers/radix_attention.py
View File

@@ -4,6 +4,7 @@ import numpy as np
import torch
from torch import nn
from sglang.global_config import global_config
from sglang.srt.layers.context_flashattention_nopad import context_attention_fwd
from sglang.srt.layers.extend_attention import extend_attention_fwd
from sglang.srt.layers.token_attention import token_attention_fwd
@@ -103,12 +104,29 @@ class RadixAttention(nn.Module):
def prefill_forward_flashinfer(self, q, k, v, input_metadata: InputMetadata):
self.store_kv_cache(k, v, input_metadata)
o = input_metadata.flashinfer_prefill_wrapper.forward(
o1, s1 = input_metadata.flashinfer_prefill_wrapper_ragged.forward_return_lse(
q.contiguous().view(-1, self.tp_q_head_num, self.head_dim),
input_metadata.token_to_kv_pool.kv_data[self.layer_id],
k.contiguous().view(-1, self.tp_k_head_num, self.head_dim),
v.contiguous().view(-1, self.tp_v_head_num, self.head_dim),
logits_soft_cap=self.logit_cap,
)
if input_metadata.no_prefix:
o = o1
else:
o2, s2 = input_metadata.flashinfer_prefill_wrapper_paged.forward_return_lse(
q.contiguous().view(-1, self.tp_q_head_num, self.head_dim),
input_metadata.token_to_kv_pool.kv_data[self.layer_id],
causal=False,
logits_soft_cap=self.logit_cap,
)
from flashinfer.cascade import merge_state
o, _ = merge_state(o1, s1, o2, s2)
if input_metadata.total_num_tokens >= global_config.layer_sync_threshold:
torch.cuda.synchronize()
return o.view(-1, self.tp_q_head_num * self.head_dim)
def decode_forward_flashinfer(self, q, k, v, input_metadata: InputMetadata):