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Commit3fd7a168bf("perf script: Add 'cgroup' field for output") added support for printing cgroup path in perf script output. It was okay if you didn't want any stacks: $ sudo perf script --comms jpegtran:23f4bf -F comm,tid,cpu,time,cgroup jpegtran:23f4bf 3321915 [013] 404718.587488: /idle.slice/polish.service jpegtran:23f4bf 3321915 [031] 404718.592073: /idle.slice/polish.service With stacks it gets messier as cgroup is printed after the stack: $ perf script --comms jpegtran:23f4bf -F comm,tid,cpu,time,cgroup,ip,sym jpegtran:23f4bf 3321915 [013] 404718.587488: 5c554 compress_output 570d9 jpeg_finish_compress 3476e jpegtran_main 330ee jpegtran::main 326e2 core::ops::function::FnOnce::call_once (inlined) 326e2 std::sys_common::backtrace::__rust_begin_short_backtrace /idle.slice/polish.service jpegtran:23f4bf 3321915 [031] 404718.592073: 8474d jsimd_encode_mcu_AC_first_prepare_sse2.PADDING 55af68e62fff [unknown] /idle.slice/polish.service Let's instead print cgroup on the same line as comm: $ perf script --comms jpegtran:23f4bf -F comm,tid,cpu,time,cgroup,ip,sym jpegtran:23f4bf 3321915 [013] 404718.587488: /idle.slice/polish.service 5c554 compress_output 570d9 jpeg_finish_compress 3476e jpegtran_main 330ee jpegtran::main 326e2 core::ops::function::FnOnce::call_once (inlined) 326e2 std::sys_common::backtrace::__rust_begin_short_backtrace jpegtran:23f4bf 3321915 [031] 404718.592073: /idle.slice/polish.service 8474d jsimd_encode_mcu_AC_first_prepare_sse2.PADDING 55af68e62fff [unknown] Fixes:3fd7a168bf("perf script: Add 'cgroup' field for output") Signed-off-by: Ivan Babrou <ivan@cloudflare.com> Acked-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: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: kernel-team@cloudflare.com Link: https://lore.kernel.org/r/20230718000737.49077-1-ivan@cloudflare.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 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.