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    <title>Tracing on Head First eBPF</title>
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      <title>一次可挂上四百多个系统调用：tracing_multi 进 Linux 7.2</title>
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      <description>本文地址：https://www.ebpf.top/post/lwn-tracing-multi 1. 为什么还要动跟踪点 2. 从「一对一蹦床」到「一组一起管」 3. 开发里两道硬坎：锁与热补丁 4. 用户态 API：pattern + 可选 cookie 5. 验证器的硬边界：能读参数，不能解引用指针 6. 规模预期与 Arm 上的 IPI 7.</description>
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