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[Attention][UX][1/N] Add AttentionConfig and change attention env vars to CLI arguments (#26315)

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Signed-off-by: Matthew Bonanni <mbonanni@redhat.com>
Signed-off-by: Matthew Bonanni <mbonanni001@gmail.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Co-authored-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>
Co-authored-by: Lucas Wilkinson <LucasWilkinson@users.noreply.github.com>
This commit is contained in:
Matthew Bonanni
2025-12-05 12:48:43 -05:00
committed by GitHub
parent dff0a2b394
commit 66e674cdd5
22 changed files with 367 additions and 325 deletions
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11
vllm/model_executor/models/config.py
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@@ -4,7 +4,7 @@ from copy import deepcopy
from math import lcm
from typing import TYPE_CHECKING
import vllm.envs as envs
from vllm.attention.backends.registry import AttentionBackendEnum
from vllm.logger import init_logger
from vllm.model_executor.models import ModelRegistry
from vllm.platforms import current_platform
@@ -331,6 +331,7 @@ class HybridAttentionMambaModelConfig(VerifyAndUpdateConfig):
# Enable FULL_AND_PIECEWISE by default
MambaModelConfig.verify_and_update_config(vllm_config)
attention_config = vllm_config.attention_config
cache_config = vllm_config.cache_config
model_config = vllm_config.model_config
parallel_config = vllm_config.parallel_config
@@ -347,7 +348,9 @@ class HybridAttentionMambaModelConfig(VerifyAndUpdateConfig):
# * CUTLASS_MLA backend: kernel_block_size 128 alignment
# * Other MLA backends: kernel_block_size 64 alignment
if model_config.use_mla:
use_cutlass_mla = envs.VLLM_ATTENTION_BACKEND == "CUTLASS_MLA"
use_cutlass_mla = (
attention_config.backend == AttentionBackendEnum.CUTLASS_MLA
)
kernel_block_alignment_size = 128 if use_cutlass_mla else 64
attn_page_size_1_token = MLAAttentionSpec(
block_size=1,
@@ -361,8 +364,8 @@ class HybridAttentionMambaModelConfig(VerifyAndUpdateConfig):
current_platform.is_device_capability(100)
and model_config.get_head_size() == 256
and (
envs.VLLM_ATTENTION_BACKEND is None
or envs.VLLM_ATTENTION_BACKEND == "FLASHINFER"
attention_config.backend is None
or attention_config.backend == AttentionBackendEnum.FLASHINFER
)
):
# https://github.com/flashinfer-ai/flashinfer/issues/1993 reports that`