> For the complete documentation index, see [llms.txt](https://book.bsdcn.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://book.bsdcn.org/man/man4/dtrace_mib.4.md). # dtrace\_mib.4 `dtrace_mib` — 用于管理信息库的 DTrace 提供者 ## 名称 `dtrace_mib` ## 概要 `mib:module:count:counter` `在 config(5) 中：options KDTRACE_MIB_SDT` ## 描述 `mib` 提供者允许跟踪管理信息库（Management Information Base）统计计数器。 已检测的 `module` 列表包括： **`ah`** IP 认证头（RFC 2402），[ipsec(4)](/man/man4/ipsec.4.md) **`esp`** IP 封装安全载荷（RFC 1827、RFC 2406），[ipsec(4)](/man/man4/ipsec.4.md) **`icmp`** [icmp(4)](/man/man4/icmp.4.md) **`icmp6`** [icmp6(4)](/man/man4/icmp6.4.md) **`ip`** [ip(4)](/man/man4/ip.4.md) **`ip6`** [ip6(4)](/man/man4/ip6.4.md) **`ipcomp`** IP 载荷压缩协议，[ipsec(4)](/man/man4/ipsec.4.md) **`ipsec`** [ipsec(4)](/man/man4/ipsec.4.md) **`tcp`** [tcp(4)](/man/man4/tcp.4.md) **`udp`** [udp(4)](/man/man4/udp.4.md) `mib:``module``:count:``counter` 探测在 `module` 中的 `counter` 增加时触发。 第一个探测参数 `uint64_t` `args[0]` 是 `counter` 将增加的增量。 注意，某些探测（如 `mib:esp:count:esps_hist` 或 `mib:icmp6:count:icp6s_outhist`）提供额外的探测特定参数。 ## 实例 ### 实例 1：跟踪 IP 统计计数器 调试网络问题时，一个常见线索是意外递增的错误计数器。这很有帮助，因为它让我们了解可能出了什么问题，但这些计数器通常可能在不同函数中递增。 跟踪 [ip(4)](/man/man4/ip.4.md) 模块中的所有 `mib` 探测，并打印当前计数和栈回溯： ```sh # dtrace -n 'mib:ip:count: { printf("%d", arg0); stack(); }' dtrace: description 'mib:ip:count: ' matched 29 probes CPU ID FUNCTION:NAME 7 98784 count:ips_localout 1 kernel`ip_output+0x17a2 kernel`udp_send+0xaca kernel`sosend_dgram+0x315 kernel`sousrsend+0x79 kernel`kern_sendit+0x1be kernel`sendit+0x1ab kernel`sys_sendmsg+0x5b kernel`amd64_syscall+0x169 kernel`0xffffffff81094b8b ``` ## 参见 [dtrace(1)](/man/man1/dtrace.1.md), [dtrace\_ip(4)](/man/man4/dtrace_ip.4.md), [dtrace\_tcp(4)](/man/man4/dtrace_tcp.4.md), [dtrace\_udp(4)](/man/man4/dtrace_udp.4.md), [tracing(7)](/man/man7/tracing.7.md), [sysctl(8)](/man/man8/sysctl.8.md) ## 标准 FreeBSD `mib` 提供者中的探测描述与 Solaris/illumos mib 提供者中的不兼容。 ## 作者 `mib` 提供者由 Kristof Provost 添加到 FreeBSD。 本手册页由 Mateusz Piotrowski <0mp@FreeBSD.org> 编写。 --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://book.bsdcn.org/man/man4/dtrace_mib.4.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.