优先使用STREAM方法进行无root权限内存测试 (Prioritize STREAM method for no-root memory testing)

[Copilot]

问题描述 (Problem Description)

当前系统检测到无root权限时，DD和Sysbench测试方法会直接回退到mbw测试，跳过了STREAM方法。但STREAM方法实际上不需要root权限，应该被优先尝试。

Currently, when the system is detected to have no root permissions, DD and Sysbench test methods directly fall back to mbw testing, skipping the STREAM method. However, STREAM method actually doesn't require root permissions and should be tried first.

修复内容 (Changes Made)

1. 修改无root权限逻辑

• 更新 DDTest() 函数：当检测到无root权限时，优先尝试 StreamTest()
• 更新 SysBenchTest() 函数：当检测到无root权限时，优先尝试 StreamTest()
• 只有在STREAM不可用时才回退到 simpleMemoryTest() (mbw)

2. 改进帮助信息

• 更新 -m 参数描述，明确列出所有可用的测试方法：stream, dd, sysbench, winsat, or auto

3. 完善文档说明

• 在README中明确标注STREAM方法无需root权限
• 添加无root权限场景的特殊处理说明
• 更新测试方法优先级文档

测试验证 (Verification)

# 测试DD方法 - 现在会优先尝试STREAM
./memorytest -m dd -l en
# 输出：Current system detected no root permission
# 然后尝试STREAM，失败后使用mbw

# 测试Sysbench方法 - 现在会优先尝试STREAM  
./memorytest -m sysbench -l zh
# 输出：当前检测到系统无root权限
# 然后尝试STREAM，失败后使用mbw

行为变更 (Behavior Changes)

之前的优先级 (Previous Priority):

• 有root权限：stream > dd > sysbench
• 无root权限：直接使用mbw

现在的优先级 (Current Priority):

• 有root权限：stream > dd > sysbench
• 无root权限：stream > mbw

这确保了STREAM方法在所有场景下都有最高优先级，符合其高性能内存带宽测试的定位。

相关文件 (Files Changed)

• memory/macos_linux_mem.go - 核心逻辑修改
• cmd/main.go - 帮助信息优化
• README.md - 文档更新
• .gitignore - 构建产物清理

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• hits.spiritlhl.net
  • Triggering command: ./main -m auto -l en (dns block)
  • Triggering command: ./main -m dd -l zh (dns block)
  • Triggering command: ./main -m sysbench -l en (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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