From: Changbin Du <changbin.du@gmail.com>
To: Jiri Olsa <jolsa@redhat.com>, Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: 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, Changbin Du <changbin.du@gmail.com>
Subject: [PATCH v5 10/17] perf ftrace: add support for trace option sleep-time
Date: Sat, 11 Jul 2020 20:40:28 +0800 [thread overview]
Message-ID: <20200711124035.6513-11-changbin.du@gmail.com> (raw)
In-Reply-To: <20200711124035.6513-1-changbin.du@gmail.com>
This adds an option '--graph-opts nosleep-time' which allow us
only to measure on-CPU time. This option is function_graph tracer
only.
Signed-off-by: Changbin Du <changbin.du@gmail.com>
---
v3: switch to uniform option --graph-opts.
v2: option name '--nosleep-time' -> '--graph-nosleep-time'.
---
tools/perf/Documentation/perf-ftrace.txt | 4 +++
tools/perf/builtin-ftrace.c | 41 ++++++++++++++++++++++++
2 files changed, 45 insertions(+)
diff --git a/tools/perf/Documentation/perf-ftrace.txt b/tools/perf/Documentation/perf-ftrace.txt
index 676a30cb9b5a..760c2b78c305 100644
--- a/tools/perf/Documentation/perf-ftrace.txt
+++ b/tools/perf/Documentation/perf-ftrace.txt
@@ -102,6 +102,10 @@ OPTIONS
--graph-depth=::
Set max depth for function graph tracer to follow
+--graph-opts::
+ List of options allowed to set:
+ nosleep-time - Measure on-CPU time only for function_graph tracer.
+
SEE ALSO
--------
linkperf:perf-record[1], linkperf:perf-trace[1]
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
index 91611eef5deb..b4eda459ba78 100644
--- a/tools/perf/builtin-ftrace.c
+++ b/tools/perf/builtin-ftrace.c
@@ -42,6 +42,7 @@ struct perf_ftrace {
unsigned long percpu_buffer_size;
bool inherit;
int func_stack_trace;
+ int graph_nosleep_time;
};
struct filter_entry {
@@ -200,6 +201,7 @@ static void reset_tracing_options(struct perf_ftrace *ftrace __maybe_unused)
{
write_tracing_option_file("function-fork", "0");
write_tracing_option_file("func_stack_trace", "0");
+ write_tracing_option_file("sleep-time", "1");
}
static int reset_tracing_files(struct perf_ftrace *ftrace __maybe_unused)
@@ -381,6 +383,17 @@ static int set_tracing_trace_inherit(struct perf_ftrace *ftrace)
return 0;
}
+static int set_tracing_sleep_time(struct perf_ftrace *ftrace)
+{
+ if (!ftrace->graph_nosleep_time)
+ return 0;
+
+ if (write_tracing_option_file("sleep-time", "0") < 0)
+ return -1;
+
+ return 0;
+}
+
static int __cmd_ftrace(struct perf_ftrace *ftrace, int argc, const char **argv)
{
char *trace_file;
@@ -460,6 +473,11 @@ static int __cmd_ftrace(struct perf_ftrace *ftrace, int argc, const char **argv)
goto out_reset;
}
+ if (set_tracing_sleep_time(ftrace) < 0) {
+ pr_err("failed to set tracing option sleep-time\n");
+ goto out_reset;
+ }
+
if (write_tracing_file("current_tracer", ftrace->tracer) < 0) {
pr_err("failed to set current_tracer to %s\n", ftrace->tracer);
goto out_reset;
@@ -633,6 +651,26 @@ static int parse_func_tracer_opts(const struct option *opt,
return 0;
}
+static int parse_graph_tracer_opts(const struct option *opt,
+ const char *str, int unset)
+{
+ int ret;
+ struct perf_ftrace *ftrace = (struct perf_ftrace *) opt->value;
+ struct sublevel_option graph_tracer_opts[] = {
+ { .name = "nosleep-time", .value_ptr = &ftrace->graph_nosleep_time },
+ { .name = NULL, }
+ };
+
+ if (unset)
+ return 0;
+
+ ret = perf_parse_sublevel_options(str, graph_tracer_opts);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
int cmd_ftrace(int argc, const char **argv)
{
int ret;
@@ -675,6 +713,9 @@ int cmd_ftrace(int argc, const char **argv)
"Set nograph filter on given functions", parse_filter_func),
OPT_INTEGER('D', "graph-depth", &ftrace.graph_depth,
"Max depth for function graph tracer"),
+ OPT_CALLBACK(0, "graph-opts", &ftrace, "options",
+ "graph tracer options, available options: nosleep-time",
+ parse_graph_tracer_opts),
OPT_CALLBACK('m', "buffer-size", &ftrace.percpu_buffer_size, "size",
"size of per cpu buffer", parse_buffer_size),
OPT_BOOLEAN(0, "inherit", &ftrace.inherit,
--
2.25.1
next prev parent reply other threads:[~2020-07-11 12:43 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-11 12:40 [PATCH v5 00/17] perf: ftrace enhancement Changbin Du
2020-07-11 12:40 ` [PATCH v5 01/17] perf ftrace: select function/function_graph tracer automatically Changbin Du
2020-07-11 12:40 ` [PATCH v5 02/17] perf ftrace: add option '-F/--funcs' to list available functions Changbin Du
2020-07-13 1:49 ` Namhyung Kim
2020-07-16 15:21 ` Arnaldo Carvalho de Melo
2020-07-17 13:58 ` Changbin Du
2020-07-17 15:05 ` Steven Rostedt
2020-07-17 16:21 ` Arnaldo Carvalho de Melo
2020-07-17 16:27 ` Steven Rostedt
2020-07-17 16:37 ` Arnaldo Carvalho de Melo
2020-07-18 7:06 ` Changbin Du
2020-07-17 17:39 ` Ian Rogers
2020-07-11 12:40 ` [PATCH v5 03/17] perf ftrace: add option -t/--tid to filter by thread id Changbin Du
2020-07-16 15:36 ` Arnaldo Carvalho de Melo
2020-07-17 13:26 ` Changbin Du
2020-07-17 16:44 ` Arnaldo Carvalho de Melo
2020-07-17 17:01 ` Steven Rostedt
2020-07-17 17:40 ` Arnaldo Carvalho de Melo
2020-07-17 17:53 ` Steven Rostedt
2020-07-17 19:34 ` Arnaldo Carvalho de Melo
2020-07-17 19:44 ` Steven Rostedt
2020-07-21 13:44 ` Namhyung Kim
2020-07-18 5:47 ` Changbin Du
2020-07-11 12:40 ` [PATCH v5 04/17] perf ftrace: factor out function write_tracing_file_int() Changbin Du
2020-07-11 12:40 ` [PATCH v5 05/17] perf ftrace: add option '-m/--buffer-size' to set per-cpu buffer size Changbin Du
2020-07-11 12:40 ` [PATCH v5 06/17] perf ftrace: show trace column header Changbin Du
2020-07-11 12:40 ` [PATCH v5 07/17] perf ftrace: add option '--inherit' to trace children processes Changbin Du
2020-07-13 1:59 ` Namhyung Kim
2020-07-17 14:27 ` Changbin Du
2020-07-11 12:40 ` [PATCH v5 08/17] perf: util: add general function to parse sublevel options Changbin Du
2020-07-11 12:40 ` [PATCH v5 09/17] perf ftrace: add support for tracing option 'func_stack_trace' Changbin Du
2020-07-11 12:40 ` Changbin Du [this message]
2020-07-11 12:40 ` [PATCH v5 11/17] perf ftrace: add support for trace option funcgraph-irqs Changbin Du
2020-07-11 12:40 ` [PATCH v5 12/17] perf ftrace: add support for tracing option 'irq-info' Changbin Du
2020-07-11 12:40 ` [PATCH v5 13/17] perf ftrace: add option 'verbose' to show more info for graph tracer Changbin Du
2020-07-13 2:07 ` Namhyung Kim
2020-07-17 14:13 ` Changbin Du
2020-07-11 12:40 ` [PATCH v5 14/17] perf ftrace: add support for trace option tracing_thresh Changbin Du
2020-07-11 12:40 ` [PATCH v5 15/17] perf: ftrace: allow set graph depth by '--graph-opts' Changbin Du
2020-07-11 12:40 ` [PATCH v5 16/17] perf ftrace: add option -D/--delay to delay tracing Changbin Du
2020-07-11 12:40 ` [PATCH v5 17/17] perf ftrace: add change log Changbin Du
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