Ping for review status, thanks. On Fri, Sep 15, 2017 at 07:19:31PM +0800, [email protected] wrote: > From: Changbin Du <[email protected]> > > There are some trace options to control what gets printed in the trace > output or manipulate the tracers. This patch add a commandline option > to set it. > > Example: > perf ftrace -t function -O noprint-parent --trace-funcs "__kmalloc" -a > Xorg-1874 [002] .... 4107.182911: __kmalloc > Xorg-1874 [002] .... 4107.182920: __kmalloc > > perf ftrace -t function -O print-parent --trace-funcs "__kmalloc" -a > Xorg-1874 [000] .... 3924.917243: __kmalloc > <-drm_atomic_state_init > Xorg-1874 [000] .... 3924.917251: __kmalloc > <-drm_atomic_state_init > > Signed-off-by: Changbin Du <[email protected]> > --- > tools/perf/builtin-ftrace.c | 19 +++++++++++++++++++ > 1 file changed, 19 insertions(+) > > diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c > index 25a42ac..8b473e2 100644 > --- a/tools/perf/builtin-ftrace.c > +++ b/tools/perf/builtin-ftrace.c > @@ -36,6 +36,7 @@ struct perf_ftrace { > struct list_head graph_funcs; > struct list_head nograph_funcs; > int graph_depth; > + const char *trace_option; > }; > > struct filter_entry { > @@ -261,6 +262,17 @@ static int set_tracing_depth(struct perf_ftrace *ftrace) > return 0; > } > > +static int set_tracing_option(struct perf_ftrace *ftrace) > +{ > + if (ftrace->trace_option == NULL) > + return 0; > + > + if (write_tracing_file("trace_options", ftrace->trace_option) < 0) > + return -1; > + > + return 0; > +} > + > static int __cmd_ftrace(struct perf_ftrace *ftrace, int argc, const char > **argv) > { > char *trace_file; > @@ -313,6 +325,11 @@ static int __cmd_ftrace(struct perf_ftrace *ftrace, int > argc, const char **argv) > goto out_reset; > } > > + if (set_tracing_option(ftrace) < 0) { > + pr_err("failed to set trace option\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; > @@ -456,6 +473,8 @@ 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_STRING('O', "trace-option", &ftrace.trace_option, "option", > + "Set a trace option"), > OPT_END() > }; > > -- > 2.7.4 >
-- Thanks, Changbin Du
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