From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Changbin Du <changbin.du@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Namhyung Kim <namhyung@kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v8 11/18] perf ftrace: add support for tracing option 'irq-info'
Date: Fri, 14 Aug 2020 09:28:07 -0300 [thread overview]
Message-ID: <20200814122807.GB13995@kernel.org> (raw)
In-Reply-To: <20200808023141.14227-12-changbin.du@gmail.com>
Em Sat, Aug 08, 2020 at 10:31:34AM +0800, Changbin Du escreveu:
> This adds support to display irq context info for function tracer. To do
> this, just specify a '--func-opts irq-info' option.
Applied, ditto about adding an example to perf-ftrace.txt
> Signed-off-by: Changbin Du <changbin.du@gmail.com>
> ---
> tools/perf/Documentation/perf-ftrace.txt | 1 +
> tools/perf/builtin-ftrace.c | 21 ++++++++++++++++++++-
> 2 files changed, 21 insertions(+), 1 deletion(-)
>
> diff --git a/tools/perf/Documentation/perf-ftrace.txt b/tools/perf/Documentation/perf-ftrace.txt
> index fca55ac55ff3..37ea3ea97922 100644
> --- a/tools/perf/Documentation/perf-ftrace.txt
> +++ b/tools/perf/Documentation/perf-ftrace.txt
> @@ -79,6 +79,7 @@ OPTIONS
> --func-opts::
> List of options allowed to set:
> call-graph - Display kernel stack trace for function tracer.
> + irq-info - Display irq context info for function tracer.
>
> -G::
> --graph-funcs=::
> diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
> index b4c821be4fb5..d1241febe143 100644
> --- a/tools/perf/builtin-ftrace.c
> +++ b/tools/perf/builtin-ftrace.c
> @@ -44,6 +44,7 @@ struct perf_ftrace {
> unsigned long percpu_buffer_size;
> bool inherit;
> int func_stack_trace;
> + int func_irq_info;
> int graph_nosleep_time;
> int graph_noirqs;
> };
> @@ -209,6 +210,7 @@ static void reset_tracing_options(struct perf_ftrace *ftrace __maybe_unused)
> write_tracing_option_file("func_stack_trace", "0");
> write_tracing_option_file("sleep-time", "1");
> write_tracing_option_file("funcgraph-irqs", "1");
> + write_tracing_option_file("irq-info", "0");
> }
>
> static int reset_tracing_files(struct perf_ftrace *ftrace __maybe_unused)
> @@ -296,6 +298,17 @@ static int set_tracing_func_stack_trace(struct perf_ftrace *ftrace)
> return 0;
> }
>
> +static int set_tracing_func_irqinfo(struct perf_ftrace *ftrace)
> +{
> + if (!ftrace->func_irq_info)
> + return 0;
> +
> + if (write_tracing_option_file("irq-info", "1") < 0)
> + return -1;
> +
> + return 0;
> +}
> +
> static int reset_tracing_cpu(void)
> {
> struct perf_cpu_map *cpumap = perf_cpu_map__new(NULL);
> @@ -471,6 +484,11 @@ static int __cmd_ftrace(struct perf_ftrace *ftrace, int argc, const char **argv)
> goto out_reset;
> }
>
> + if (set_tracing_func_irqinfo(ftrace) < 0) {
> + pr_err("failed to set tracing option irq-info\n");
> + goto out_reset;
> + }
> +
> if (set_tracing_filters(ftrace) < 0) {
> pr_err("failed to set tracing filters\n");
> goto out_reset;
> @@ -660,6 +678,7 @@ static int parse_func_tracer_opts(const struct option *opt,
> struct perf_ftrace *ftrace = (struct perf_ftrace *) opt->value;
> struct sublevel_option func_tracer_opts[] = {
> { .name = "call-graph", .value_ptr = &ftrace->func_stack_trace },
> + { .name = "irq-info", .value_ptr = &ftrace->func_irq_info },
> { .name = NULL, }
> };
>
> @@ -742,7 +761,7 @@ int cmd_ftrace(int argc, const char **argv)
> OPT_CALLBACK('N', "notrace-funcs", &ftrace.notrace, "func",
> "do not trace given functions", parse_filter_func),
> OPT_CALLBACK(0, "func-opts", &ftrace, "options",
> - "function tracer options, available options: call-graph",
> + "function tracer options, available options: call-graph,irq-info",
> parse_func_tracer_opts),
> OPT_CALLBACK('G', "graph-funcs", &ftrace.graph_funcs, "func",
> "trace given functions using function_graph tracer",
> --
> 2.25.1
>
--
- Arnaldo
next prev parent reply other threads:[~2020-08-14 12:28 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-08 2:31 [PATCH v8 00/18] [PATCH v7 00/18] perf: ftrace enhancement Changbin Du
2020-08-08 2:31 ` [PATCH v8 01/18] perf ftrace: select function/function_graph tracer automatically Changbin Du
2020-08-08 2:31 ` [PATCH v8 02/18] perf ftrace: add option '-F/--funcs' to list available functions Changbin Du
2020-08-14 11:35 ` Arnaldo Carvalho de Melo
2020-08-20 15:18 ` Changbin Du
2020-08-08 2:31 ` [PATCH v8 03/18] perf ftrace: factor out function write_tracing_file_int() Changbin Du
2020-08-08 2:31 ` [PATCH v8 04/18] perf ftrace: add option '-m/--buffer-size' to set per-cpu buffer size Changbin Du
2020-08-14 11:53 ` Arnaldo Carvalho de Melo
2020-08-14 12:12 ` Arnaldo Carvalho de Melo
2020-08-14 12:58 ` Arnaldo Carvalho de Melo
2020-08-08 2:31 ` [PATCH v8 05/18] perf ftrace: show trace column header Changbin Du
2020-08-14 11:56 ` Arnaldo Carvalho de Melo
2020-08-14 11:57 ` Arnaldo Carvalho de Melo
2020-08-08 2:31 ` [PATCH v8 06/18] perf ftrace: add option '--inherit' to trace children processes Changbin Du
2020-08-14 12:12 ` Arnaldo Carvalho de Melo
2020-08-08 2:31 ` [PATCH v8 07/18] perf: util: add general function to parse sublevel options Changbin Du
2020-08-08 2:31 ` [PATCH v8 08/18] perf ftrace: add support for tracing option 'func_stack_trace' Changbin Du
2020-08-14 12:24 ` Arnaldo Carvalho de Melo
2020-08-20 15:15 ` Changbin Du
2020-08-08 2:31 ` [PATCH v8 09/18] perf ftrace: add support for trace option sleep-time Changbin Du
2020-08-14 12:26 ` Arnaldo Carvalho de Melo
2020-08-08 2:31 ` [PATCH v8 10/18] perf ftrace: add support for trace option funcgraph-irqs Changbin Du
2020-08-14 12:27 ` Arnaldo Carvalho de Melo
2020-08-08 2:31 ` [PATCH v8 11/18] perf ftrace: add support for tracing option 'irq-info' Changbin Du
2020-08-14 12:28 ` Arnaldo Carvalho de Melo [this message]
2020-08-20 15:09 ` Changbin Du
2020-08-08 2:31 ` [PATCH v8 12/18] perf ftrace: add option 'verbose' to show more info for graph tracer Changbin Du
2020-08-08 2:31 ` [PATCH v8 13/18] perf ftrace: add support for trace option tracing_thresh Changbin Du
2020-08-14 12:33 ` Arnaldo Carvalho de Melo
2020-08-20 15:08 ` Changbin Du
2020-08-08 2:31 ` [PATCH v8 14/18] perf: ftrace: allow set graph depth by '--graph-opts' Changbin Du
2020-08-08 2:31 ` [PATCH v8 15/18] perf ftrace: add option -D/--delay to delay tracing Changbin Du
2020-08-08 2:31 ` [PATCH v8 16/18] perf ftrace: add option --tid to filter by thread id Changbin Du
2020-08-08 2:31 ` [PATCH v8 17/18] perf: ftrace: Add set_tracing_options() to set all trace options Changbin Du
2020-08-08 2:31 ` [PATCH v8 18/18] perf ftrace: add change log Changbin Du
2020-08-14 12:38 ` [PATCH v8 00/18] [PATCH v7 00/18] perf: ftrace enhancement Arnaldo Carvalho de Melo
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