[Cherry-Pick][Loader] Add values natural order check to layers grouped validation

[bukejiyu]

Motivation

💡 If this PR is a Cherry Pick, the PR title needs to follow the format by adding the [Cherry-Pick] label at the very beginning and appending the original PR ID at the end. For example, [Cherry-Pick][CI] Add check trigger and logic(#5191)

💡 如若此PR是Cherry Pick，PR标题需遵循格式，在最开始加上[Cherry-Pick]标签，以及最后面加上原PR ID，例如[Cherry-Pick][CI] Add check trigger and logic(#5191)

Modifications

Usage or Command

Accuracy Tests

Checklist

• Add at least a tag in the PR title.
  • Tag list: [[FDConfig],[APIServer],[Engine], [Scheduler], [PD Disaggregation], [Executor], [Graph Optimization], [Speculative Decoding], [RL], [Models], [Quantization], [Loader], [OP], [KVCache], [DataProcessor], [BugFix], [Docs], [CI], [Optimization], [Feature], [Benchmark], [Others], [XPU], [HPU], [GCU], [DCU], [Iluvatar], [Metax]]
  • You can add new tags based on the PR content, but the semantics must be clear.
• Format your code, run pre-commit before commit.
• Add unit tests. Please write the reason in this PR if no unit tests.
• Provide accuracy results.
• If the current PR is submitting to the release branch, make sure the PR has been submitted to the develop branch, then cherry-pick it to the release branch with the [Cherry-Pick] PR tag.

[paddle-bot]

Thanks for your contribution!

[PaddlePaddle-bot]

🤖 Paddle-CI-Agent | pr_review | 2026-05-14 20:28:35

📋 Review 摘要

PR 概述：在 get_all_weights_file 中新增 values 自然序校验，确保 is_layers_are_grouped 标志同时满足 keys 分组和 values 自然序两个条件。
变更范围：fastdeploy/model_executor/load_weight_utils.py
影响面 Tag：[Loader]

📝 PR 规范检查

PR 存在两处不合规：① Cherry-Pick 标题缺少原始 PR 编号；② Motivation/Modifications 等描述章节内容为空。

标题建议（可直接复制）：

• [Cherry-Pick][Loader] Add values natural order check to layers grouped validation(#原PR号)

PR 描述建议（可直接复制，必须复刻 checklist §D2 模板的完整结构）：

## Motivation
当 `weight_map` 的 values（safetensors 分片文件名）不满足自然序时，`layers_are_grouped` 仅检查 keys 分组而不检查文件名顺序，可能导致在不应使用逐文件迭代器的场景下误用 `safetensors_weights_iterator`，从而引发权重加载顺序错误。本次变更在 layers 分组检查之外，增加对 values 自然序的校验。

## Modifications
- 新增 `values_are_naturally_ordered(values)` 函数（`load_weight_utils.py`）：检查 weight_map 的 values 列表是否满足自然序
- 修改 `get_all_weights_file` 函数中多文件 safetensors 分支：将 `is_layers_are_grouped` 改为 `is_keys_grouped AND is_values_naturally_ordered` 的联合判断

## Usage or Command
N/A

## Accuracy Tests
N/A

## Checklist

- [x] Add at least a tag in the PR title.
  - Tag list: [`[FDConfig]`,`[APIServer]`,`[Engine]`, `[Scheduler]`, `[PD Disaggregation]`, `[Executor]`, `[Graph Optimization]`, `[Speculative Decoding]`, `[RL]`, `[Models]`, `[Quantization]`, `[Loader]`, `[OP]`, `[KVCache]`, `[DataProcessor]`, `[BugFix]`, `[Docs]`, `[CI]`, `[Optimization]`, `[Feature]`, `[Benchmark]`, `[Others]`, `[XPU]`, `[HPU]`, `[GCU]`, `[DCU]`, `[Iluvatar]`, `[Metax]`]
  - You can add new tags based on the PR content, but the semantics must be clear.
- [ ] Format your code, run `pre-commit` before commit.
- [ ] Add unit tests. Please write the reason in this PR if no unit tests.
- [ ] Provide accuracy results.
- [x] If the current PR is submitting to the `release` branch, make sure the PR has been submitted to the `develop` branch, then cherry-pick it to the `release` branch with the `[Cherry-Pick]` PR tag.

问题

级别	文件	概述
❓ 疑问	fastdeploy/model_executor/load_weight_utils.py:541	变量名 is_keys_orders 与 layers_are_grouped 函数语义不匹配，建议改为 is_keys_grouped

总体评价

逻辑变更合理，补充了文件名自然序校验，提升了分组判断的健壮性。建议补充 PR 描述信息并修正 Cherry-Pick 标题格式（需补充原始 PR 编号）。

[PaddlePaddle-bot]

❓ 疑问 变量名 is_keys_orders 语义略显模糊，与 layers_are_grouped 函数名所表达的"分组"含义不一致。

建议改为 is_keys_grouped 与函数名保持一致：

is_keys_grouped = layers_are_grouped(keys)
is_values_naturally_ordered = values_are_naturally_ordered(values)
is_layers_are_grouped = is_keys_grouped and is_values_naturally_ordered

[PaddlePaddle-bot]

🤖 Paddle-CI-Agent | ci_status_monitor | 2026-05-14 20:40:08

CI报告基于以下代码生成（30分钟更新一次）:

• PR commit: 96f5722
• Merge base: 88a7479 (branch: release/online/20260415)
• 查看完整 Diff
• CI 详情

---

1 任务总览

⏳ CI 进行中，Required 任务尚未完成（1个运行中，1个等待中），请等待结果。

总执行（rerun次数）	总任务	✅ 通过	❌ 失败	⏳ 运行中	⏸️ 等待中	跳过
17(0)	17	12	1	3	1	0

2 任务状态汇总

2.1 Required任务 : 0/2 通过

必选任务阻塞合并，失败需优先处理。

状态	任务	耗时	根因	修复建议	日志	重跑
⏳	xpu_8cards_case_test / run_xpu_8cards_cases	-	运行中	-	Job	-
⏸️	xpu_4cards_case_test / run_xpu_4cards_cases	-	等待中	-	-	-

2.2 可选任务 — 12/15 通过

可选任务不阻塞合并，失败仅供参考。

状态	任务	耗时	日志	重跑
❌	Trigger Jenkins for PR	8m55s	Job	-
⏳	FD-Build-Linux / fd-build	-	Job	-
⏳	Run iluvatar Tests / run_iluvatar_cases	-	Job	-
✅	其余 12 个可选任务通过	-	-	-

---

3 失败详情（仅 required）

无