Messages in this thread |  | | From | Namhyung Kim <> | Date | Mon, 13 Jul 2020 11:07:56 +0900 | Subject | Re: [PATCH v5 13/17] perf ftrace: add option 'verbose' to show more info for graph tracer |
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On Sat, Jul 11, 2020 at 9:43 PM Changbin Du <changbin.du@gmail.com> wrote: > > Sometimes we want ftrace display more and longer information about > the trace. > > $ sudo perf ftrace -G > 2) 0.979 us | mutex_unlock(); > 2) 1.540 us | __fsnotify_parent(); > 2) 0.433 us | fsnotify(); > > $ sudo perf ftrace -G --graph-opts verbose
These -G option usage should be changed..
Thanks Namhyung
> 14160.770883 | 0) <...>-47814 | .... | 1.289 us | mutex_unlock(); > 14160.770886 | 0) <...>-47814 | .... | 1.624 us | __fsnotify_parent(); > 14160.770887 | 0) <...>-47814 | .... | 0.636 us | fsnotify(); > 14160.770888 | 0) <...>-47814 | .... | 0.328 us | __sb_end_write(); > 14160.770888 | 0) <...>-47814 | d... | 0.430 us | fpregs_assert_state_consistent(); > 14160.770889 | 0) <...>-47814 | d... | | do_syscall_64() { > 14160.770889 | 0) <...>-47814 | .... | | __x64_sys_close() { > > Signed-off-by: Changbin Du <changbin.du@gmail.com> > --- > tools/perf/Documentation/perf-ftrace.txt | 1 + > tools/perf/builtin-ftrace.c | 29 +++++++++++++++++++++++- > 2 files changed, 29 insertions(+), 1 deletion(-) > > diff --git a/tools/perf/Documentation/perf-ftrace.txt b/tools/perf/Documentation/perf-ftrace.txt > index e6e9564d6c2e..0dd5ef4f9c65 100644 > --- a/tools/perf/Documentation/perf-ftrace.txt > +++ b/tools/perf/Documentation/perf-ftrace.txt > @@ -107,6 +107,7 @@ OPTIONS > List of options allowed to set: > nosleep-time - Measure on-CPU time only for function_graph tracer. > noirqs - Ignore functions that happen inside interrupt. > + verbose - Show process names, PIDs, timestamps, etc. > > SEE ALSO > -------- > diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c > index a5906258c413..d169d6329454 100644 > --- a/tools/perf/builtin-ftrace.c > +++ b/tools/perf/builtin-ftrace.c > @@ -45,6 +45,7 @@ struct perf_ftrace { > int func_irq_info; > int graph_nosleep_time; > int graph_noirqs; > + int graph_verbose; > }; > > struct filter_entry { > @@ -205,6 +206,9 @@ 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("funcgraph-proc", "0"); > + write_tracing_option_file("funcgraph-abstime", "0"); > + write_tracing_option_file("latency-format", "0"); > write_tracing_option_file("irq-info", "0"); > } > > @@ -420,6 +424,23 @@ static int set_tracing_funcgraph_irqs(struct perf_ftrace *ftrace) > return 0; > } > > +static int set_tracing_funcgraph_verbose(struct perf_ftrace *ftrace) > +{ > + if (!ftrace->graph_verbose) > + return 0; > + > + if (write_tracing_option_file("funcgraph-proc", "1") < 0) > + return -1; > + > + if (write_tracing_option_file("funcgraph-abstime", "1") < 0) > + return -1; > + > + if (write_tracing_option_file("latency-format", "1") < 0) > + return -1; > + > + return 0; > +} > + > static int __cmd_ftrace(struct perf_ftrace *ftrace, int argc, const char **argv) > { > char *trace_file; > @@ -514,6 +535,11 @@ static int __cmd_ftrace(struct perf_ftrace *ftrace, int argc, const char **argv) > goto out_reset; > } > > + if (set_tracing_funcgraph_verbose(ftrace) < 0) { > + pr_err("failed to set tracing option funcgraph-proc/funcgraph-abstime\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; > @@ -696,6 +722,7 @@ static int parse_graph_tracer_opts(const struct option *opt, > struct sublevel_option graph_tracer_opts[] = { > { .name = "nosleep-time", .value_ptr = &ftrace->graph_nosleep_time }, > { .name = "noirqs", .value_ptr = &ftrace->graph_noirqs }, > + { .name = "verbose", .value_ptr = &ftrace->graph_verbose }, > { .name = NULL, } > }; > > @@ -752,7 +779,7 @@ int cmd_ftrace(int argc, const char **argv) > 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,noirqs", > + "graph tracer options, available options: nosleep-time,noirqs,verbose", > parse_graph_tracer_opts), > OPT_CALLBACK('m', "buffer-size", &ftrace.percpu_buffer_size, "size", > "size of per cpu buffer", parse_buffer_size), > -- > 2.25.1 >
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