optimize get_rdma_nics.sh to support nsys profile

[wangyuwen1999]

Motivation

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原有get_rdma_nics.sh实现调用多次ibdev2netdev，每次调用ibdev2netdev耗时大概0.4s。nsys profile需要用ptrace attach fork出来的进程，会增加调用耗时，由于ibdev2netdev内部存在多次fork调用，所以单次调用耗时从0.4提升到几十秒。get_rdma_nics.sh中多次调用，导致nsys profile启动进程时一直被卡在ibdev2netdev的调用中。

所以为避免nsys profile hang住，需要减少这个脚本中对于ibdev2netdev的调用。

Modifications

将ibdev2netdev的输出放入cache 变量 _IBDEV2NETDEV_CACHE中，避免后续多次调用ibdev2netdev。

Usage or Command

无

Accuracy Tests

无

Checklist

[Feature]

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[PaddlePaddle-bot]

🤖 Paddle-CI-Agent | pr_review | 2026-07-13 21:32:07

📋 Review 摘要

PR 概述：缓存 ibdev2netdev 输出以减少 RDMA NIC 枚举期间的重复 fork 调用。
变更范围：fastdeploy/cache_manager/transfer_factory/get_rdma_nics.sh
影响面 Tag：[KVCache] [PD Disaggregation]

问题

级别	文件	概述
🟡 建议	fastdeploy/cache_manager/transfer_factory/get_rdma_nics.sh:31	同名脚本副本未同步缓存逻辑，部分入口仍会多次调用 ibdev2netdev

📝 PR 规范检查

标题缺少官方 Tag。描述结构包含 checklist.md §D2 要求的 Motivation、Modifications、Usage or Command、Accuracy Tests、Checklist 章节。

标题建议（可直接复制）：

• [Optimization] optimize get_rdma_nics.sh to support nsys profile

总体评价

本次修改能覆盖 Python runtime 通过 fastdeploy.cache_manager.transfer_factory.utils.get_rdma_nics() 调用的 package 脚本，但仓库内仍有旧副本未同步，建议补齐后再合入以避免 profile 场景入口不一致。

[PaddlePaddle-bot]

🟡 建议 这次只缓存了 package 资源脚本，但仓库里还有同名脚本副本仍保留旧的多次 ibdev2netdev 调用。

fastdeploy/cache_manager/transfer_factory/utils.py 会调用本文件；但 scripts/get_rdma_nics.sh 和 tests/e2e/utils/get_rdma_nics.sh 仍在 gpu / xpu / cpu_ib 分支里直接执行 ibdev2netdev | awk，e2e 用例也会调用后者。在 nsys profile 场景下这些入口仍可能卡在多次 fork 上，和本 PR 的优化目标不一致。

建议修复方式：将同样的 _IBDEV2NETDEV_CACHE 缓存逻辑同步到这两个副本，或改成单一脚本来源，避免三份实现继续漂移。

[liyonghua0910]

LGTM

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[codecov-commenter]

Codecov Report

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Additional details and impacted files

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[paddle-bot]

Thanks for your contribution!