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SubjectRe: [PATCH v7 00/18] perf: ftrace enhancement
Hello,

On Sat, Jul 18, 2020 at 3:48 PM Changbin Du <changbin.du@gmail.com> wrote:
>
> The perf has basic kernel ftrace support but lack support of most tracing
> options. This serias is target to enhance the perf ftrace functionality so
> that we can make full use of kernel ftrace with perf.
>
> In general, this serias be cataloged into two main changes:
> 1) Improve usability of existing functions. For example, we don't need to type
> extra option to select the tracer.
> 2) Add new options to support all other ftrace functions.
>
> Here is a glance of all ftrace functions with this serias:
>
> $ sudo perf ftrace -h
>
> Usage: perf ftrace [<options>] [<command>]
> or: perf ftrace [<options>] -- <command> [<options>]
>
> -a, --all-cpus system-wide collection from all CPUs
> -C, --cpu <cpu> list of cpus to monitor
> -D, --delay <n> ms to wait before starting tracing after program start
> -F, --funcs Show available functions to filter
> -G, --graph-funcs <func>
> trace given functions using function_graph tracer
> -g, --nograph-funcs <func>
> Set nograph filter on given functions
> -m, --buffer-size <size>
> size of per cpu buffer
> -N, --notrace-funcs <func>
> do not trace given functions
> -p, --pid <pid> trace on existing process id
> -T, --trace-funcs <func>
> trace given functions using function tracer
> -t, --tracer <tracer>
> tracer to use: function or function_graph (This option is deprecated)
> -v, --verbose be more verbose
> --func-opts <options>
> function tracer options, available options: call-graph,irq-info
> --graph-opts <options>
> graph tracer options, available options: nosleep-time,noirqs,verbose,thresh=<n>,depth=<n>
> --inherit trace children processes
> --tid <tid> trace on existing thread id (exclusive to --pid)
>
> v7:
> o add back '--tid <tid>'.
> v6:
> o fix return value of read_tracing_file_to_stdout().
> o make __cmd_ftrace() shorter.
> o remove option '-t, --tid <tid>'.
> v5:
> o trivial fixes.
> v4:
> o add util/parse-sublevel-options.c
> O remove -D/--graph-depth
> v3:
> o add --func-opts and --graph-opts to set tracer specific options.
> o support units as a suffix for option '-m/--buffer-size'.
> v2:
> o patches for option '-u/--userstacktrace' and '--no-pager' are dropped.
> o update all related perf documentation.
> o rename some options. Now all funcgraph tracer options are prefixed with
> '--graph-', while all function tracer options are prefixed with '--func-'.
> o mark old options deprecated instead of removing them.

Acked-by: Namhyung Kim <namhyung@kernel.org>

Thanks
Namhyung

>
>
> Changbin Du (18):
> perf ftrace: select function/function_graph tracer automatically
> perf ftrace: add option '-F/--funcs' to list available functions
> perf ftrace: factor out function write_tracing_file_int()
> perf ftrace: add option '-m/--buffer-size' to set per-cpu buffer size
> perf ftrace: show trace column header
> perf ftrace: add option '--inherit' to trace children processes
> perf: util: add general function to parse sublevel options
> perf ftrace: add support for tracing option 'func_stack_trace'
> perf ftrace: add support for trace option sleep-time
> perf ftrace: add support for trace option funcgraph-irqs
> perf ftrace: add support for tracing option 'irq-info'
> perf ftrace: add option 'verbose' to show more info for graph tracer
> perf ftrace: add support for trace option tracing_thresh
> perf: ftrace: allow set graph depth by '--graph-opts'
> perf ftrace: add option -D/--delay to delay tracing
> perf ftrace: add option --tid to filter by thread id
> perf: ftrace: Add set_tracing_options() to set all trace options
> perf ftrace: add change log
>
> tools/perf/Documentation/perf-config.txt | 5 -
> tools/perf/Documentation/perf-ftrace.txt | 36 +-
> tools/perf/builtin-ftrace.c | 415 +++++++++++++++++++++--
> tools/perf/util/Build | 1 +
> tools/perf/util/debug.c | 61 +---
> tools/perf/util/parse-sublevel-options.c | 70 ++++
> tools/perf/util/parse-sublevel-options.h | 11 +
> 7 files changed, 513 insertions(+), 86 deletions(-)
> create mode 100644 tools/perf/util/parse-sublevel-options.c
> create mode 100644 tools/perf/util/parse-sublevel-options.h
>
> --
> 2.25.1
>

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