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ff7a4f98d5
Initial use case: Dumping the maps setup by tools/perf/examples/bpf/augmented_raw_syscalls.c, which so far are just booleans, showing just non-zeroed entries: # cat ~/.perfconfig [llvm] dump-obj = true clang-opt = -g [trace] #add_events = /home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o add_events = /wb/augmented_raw_syscalls.o $ date Tue Feb 19 16:29:33 -03 2019 $ ls -la /wb/augmented_raw_syscalls.o -rwxr-xr-x. 1 root root 14048 Jan 24 12:09 /wb/augmented_raw_syscalls.o $ file /wb/augmented_raw_syscalls.o /wb/augmented_raw_syscalls.o: ELF 64-bit LSB relocatable, eBPF, version 1 (SYSV), with debug_info, not stripped $ # trace -e recvmmsg,sendmmsg --map-dump foobar ERROR: BPF map "foobar" not found # trace -e recvmmsg,sendmmsg --map-dump filtered_pids ERROR: BPF map "filtered_pids" not found # trace -e recvmmsg,sendmmsg --map-dump pids_filtered [2583] = 1, [2267] = 1, ^Z [1]+ Stopped trace -e recvmmsg,sendmmsg --map-dump pids_filtered # pidof trace 2267 # ps ax|grep gnome-terminal|grep -v grep 2583 ? Ssl 58:33 /usr/libexec/gnome-terminal-server ^C # trace -e recvmmsg,sendmmsg --map-dump syscalls [299] = 1, [307] = 1, ^C # grep x64_recvmmsg arch/x86/entry/syscalls/syscall_64.tbl 299 64 recvmmsg __x64_sys_recvmmsg # grep x64_sendmmsg arch/x86/entry/syscalls/syscall_64.tbl 307 64 sendmmsg __x64_sys_sendmmsg # Next step probably will be something like 'perf stat's --interval-print and --interval-clear. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Martin KaFai Lau <kafai@fb.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Yonghong Song <yhs@fb.com> Link: https://lkml.kernel.org/n/tip-ztxj25rtx37ixo9cfajt8ocy@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.