mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-09-22 09:34:56 +02:00
Howard Chu
8ae7a5769b
No PERF_SAMPLE_CALLCHAIN in sample_type, but 'perf script' needs to
display a callchain, have to specify manually.
Also, prefer displaying a callchain:
gvfs-afc-volume 2267 [001] 3829232.955656: 1001115340 offcpu-time:
77f05292603f __pselect+0xbf (/usr/lib/x86_64-linux-gnu/libc.so.6)
77f052a1801c [unknown] (/usr/lib/x86_64-linux-gnu/libusbmuxd-2.0.so.6.0.0)
77f052a18d45 [unknown] (/usr/lib/x86_64-linux-gnu/libusbmuxd-2.0.so.6.0.0)
77f05289ca94 start_thread+0x384 (/usr/lib/x86_64-linux-gnu/libc.so.6)
77f052929c3c clone3+0x2c (/usr/lib/x86_64-linux-gnu/libc.so.6)
to a raw binary BPF output:
BPF output: 0000: dd 08 00 00 db 08 00 00 <DD>...<DB>...
0008: cc ce ab 3b 00 00 00 00 <CC>Ϋ;....
0010: 06 00 00 00 00 00 00 00 ........
0018: 00 fe ff ff ff ff ff ff .<FE><FF><FF><FF><FF><FF><FF>
0020: 3f 60 92 52 f0 77 00 00 ?`.R<F0>w..
0028: 1c 80 a1 52 f0 77 00 00 ..<A1>R<F0>w..
0030: 45 8d a1 52 f0 77 00 00 E.<A1>R<F0>w..
0038: 94 ca 89 52 f0 77 00 00 .<CA>.R<F0>w..
0040: 3c 9c 92 52 f0 77 00 00 <..R<F0>w..
0048: 00 00 00 00 00 00 00 00 ........
0050: 00 00 00 00 ....
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Howard Chu <howardchu95@gmail.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Gautam Menghani <gautam@linux.ibm.com>
Tested-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20241108204137.2444151-9-howardchu95@gmail.com
Link: https://lore.kernel.org/r/20250501022809.449767-8-howardchu95@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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 reStructuredText 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.