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新增环境变量 VLLM_V1_USE_REDUCED_TOPK_TOPP_SAMPLER 用于开关控制
扩展 SamplingMetadata，增加 max_top_k 与 has_any_no_top_k
在 InputBatch 侧计算 top-k 的主机端汇总信息，避免 device 同步
更新 Sampler/TopKTopPSampler 传递并使用新参数以启用优化采样

Signed-off-by: Isotr0py <2037008807@qq.com>
Signed-off-by: Isotr0py <mozf@mail2.sysu.edu.cn>

Signed-off-by: simon-mo <simon.mo@hey.com>

[V1][Sampler] Improve performance of FlashInfer sampling by sampling logits instead of probs (#18608)

Signed-off-by: Bowen Wang <abmfy@icloud.com>
Co-authored-by: mgoin <mgoin64@gmail.com>

Signed-off-by: NickLucche <nlucches@redhat.com>
Signed-off-by: Hyesoo Yang <hyeygit@gmail.com>
Co-authored-by: Hyesoo Yang <hyeygit@gmail.com>

Signed-off-by: Hyesoo Yang <hyeygit@gmail.com>
Co-authored-by: root <root@t1v-n-822696b7-w-0.us-central2-b.c.tpu-prod-env-large-adhoc.internal>

Signed-off-by: Brayden Zhong <b8zhong@uwaterloo.ca>

Signed-off-by: Nick Hill <nhill@redhat.com>

Signed-off-by: Hyesoo Yang <hyeygit@gmail.com>

Signed-off-by: NickLucche <nlucches@redhat.com>

Signed-off-by: Woosuk Kwon <woosuk.kwon@berkeley.edu>

Signed-off-by: Nick Hill <nhill@redhat.com>

- **Add SPDX license headers to python source files**
- **Check for SPDX headers using pre-commit**

commit 9d7ef44c3cfb72ca4c32e1c677d99259d10d4745
Author: Russell Bryant <rbryant@redhat.com>
Date:   Fri Jan 31 14:18:24 2025 -0500

    Add SPDX license headers to python source files
    
This commit adds SPDX license headers to python source files as
recommended to
the project by the Linux Foundation. These headers provide a concise way
that is
both human and machine readable for communicating license information
for each
source file. It helps avoid any ambiguity about the license of the code
and can
    also be easily used by tools to help manage license compliance.
    
The Linux Foundation runs license scans against the codebase to help
ensure
    we are in compliance with the licenses of the code we use, including
dependencies. Having these headers in place helps that tool do its job.
    
    More information can be found on the SPDX site:
    
    - https://spdx.dev/learn/handling-license-info/

Signed-off-by: Russell Bryant <rbryant@redhat.com>

commit 5a1cf1cb3b80759131c73f6a9dddebccac039dea
Author: Russell Bryant <rbryant@redhat.com>
Date:   Fri Jan 31 14:36:32 2025 -0500

    Check for SPDX headers using pre-commit
Signed-off-by: Russell Bryant <rbryant@redhat.com>

---------
Signed-off-by: Russell Bryant <rbryant@redhat.com>

Signed-off-by: Kazuhiro Serizawa <nserihiro@gmail.com>

Signed-off-by: Woosuk Kwon <woosuk.kwon@berkeley.edu>