775bc8ada8
libbpf has three levels of priority for output messages: warn, info, debug. By default, debug output is not printed to the console. Add a new "--debug" (short name: "-d") option to bpftool to print libbpf logs for all three levels. Internally, we simply use the function provided by libbpf to replace the default printing function by one that prints logs regardless of their level. v2: - Remove the possibility to select the log-levels to use (v1 offered a combination of "warn", "info" and "debug"). - Rename option and offer a short name: -d|--debug. - Add option description to all bpftool manual pages (instead of bpftool-prog.rst only), as all commands use libbpf. Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com> Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
94 lines
2.6 KiB
ReStructuredText
94 lines
2.6 KiB
ReStructuredText
================
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bpftool-perf
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================
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-------------------------------------------------------------------------------
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tool for inspection of perf related bpf prog attachments
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-------------------------------------------------------------------------------
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:Manual section: 8
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SYNOPSIS
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========
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**bpftool** [*OPTIONS*] **perf** *COMMAND*
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*OPTIONS* := { [{ **-j** | **--json** }] [{ **-p** | **--pretty** }] }
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*COMMANDS* :=
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{ **show** | **list** | **help** }
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PERF COMMANDS
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=============
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| **bpftool** **perf { show | list }**
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| **bpftool** **perf help**
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DESCRIPTION
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===========
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**bpftool perf { show | list }**
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List all raw_tracepoint, tracepoint, kprobe attachment in the system.
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Output will start with process id and file descriptor in that process,
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followed by bpf program id, attachment information, and attachment point.
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The attachment point for raw_tracepoint/tracepoint is the trace probe name.
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The attachment point for k[ret]probe is either symbol name and offset,
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or a kernel virtual address.
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The attachment point for u[ret]probe is the file name and the file offset.
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**bpftool perf help**
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Print short help message.
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OPTIONS
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=======
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-h, --help
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Print short generic help message (similar to **bpftool help**).
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-V, --version
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Print version number (similar to **bpftool version**).
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-j, --json
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Generate JSON output. For commands that cannot produce JSON, this
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option has no effect.
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-p, --pretty
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Generate human-readable JSON output. Implies **-j**.
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-d, --debug
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Print all logs available from libbpf, including debug-level
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information.
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EXAMPLES
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========
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| **# bpftool perf**
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::
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pid 21711 fd 5: prog_id 5 kprobe func __x64_sys_write offset 0
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pid 21765 fd 5: prog_id 7 kretprobe func __x64_sys_nanosleep offset 0
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pid 21767 fd 5: prog_id 8 tracepoint sys_enter_nanosleep
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pid 21800 fd 5: prog_id 9 uprobe filename /home/yhs/a.out offset 1159
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| **# bpftool -j perf**
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::
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[{"pid":21711,"fd":5,"prog_id":5,"fd_type":"kprobe","func":"__x64_sys_write","offset":0}, \
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{"pid":21765,"fd":5,"prog_id":7,"fd_type":"kretprobe","func":"__x64_sys_nanosleep","offset":0}, \
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{"pid":21767,"fd":5,"prog_id":8,"fd_type":"tracepoint","tracepoint":"sys_enter_nanosleep"}, \
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{"pid":21800,"fd":5,"prog_id":9,"fd_type":"uprobe","filename":"/home/yhs/a.out","offset":1159}]
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SEE ALSO
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========
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**bpf**\ (2),
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**bpf-helpers**\ (7),
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**bpftool**\ (8),
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**bpftool-prog**\ (8),
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**bpftool-map**\ (8),
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**bpftool-cgroup**\ (8),
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**bpftool-feature**\ (8),
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**bpftool-net**\ (8),
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**bpftool-btf**\ (8)
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