Em Sun, May 10, 2020 at 11:06:16PM +0800, Changbin Du escreveu: > This adds an option '--nofuncgraph-irqs' to filter out functions executed > in irq context.
Ditto > Signed-off-by: Changbin Du <[email protected]> > --- > tools/perf/builtin-ftrace.c | 20 ++++++++++++++++++++ > 1 file changed, 20 insertions(+) > > diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c > index d3fcf3b0b792..b16600a16efa 100644 > --- a/tools/perf/builtin-ftrace.c > +++ b/tools/perf/builtin-ftrace.c > @@ -41,6 +41,7 @@ struct perf_ftrace { > int graph_depth; > bool func_stack_trace; > bool nosleep_time; > + bool nofuncgraph_irqs; > }; > > struct filter_entry { > @@ -188,6 +189,7 @@ 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"); > } > > static int reset_tracing_files(struct perf_ftrace *ftrace __maybe_unused) > @@ -358,6 +360,17 @@ static int set_tracing_sleep_time(struct perf_ftrace > *ftrace) > return 0; > } > > +static int set_tracing_funcgraph_irqs(struct perf_ftrace *ftrace) > +{ > + if (!ftrace->nofuncgraph_irqs) > + return 0; > + > + if (write_tracing_option_file("funcgraph-irqs", "0") < 0) > + return -1; > + > + return 0; > +} > + > static int __cmd_ftrace(struct perf_ftrace *ftrace, int argc, const char > **argv) > { > char *trace_file; > @@ -431,6 +444,11 @@ static int __cmd_ftrace(struct perf_ftrace *ftrace, int > argc, const char **argv) > goto out_reset; > } > > + if (set_tracing_funcgraph_irqs(ftrace) < 0) { > + pr_err("failed to set tracing option funcgraph-irqs\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; > @@ -568,6 +586,8 @@ int cmd_ftrace(int argc, const char **argv) > "Max depth for function graph tracer"), > OPT_BOOLEAN(0, "nosleep-time", &ftrace.nosleep_time, > "Measure on-CPU time only (function_graph only)"), > + OPT_BOOLEAN(0, "nofuncgraph-irqs", &ftrace.nofuncgraph_irqs, > + "Ignore functions that happen inside interrupt > (function_graph only)"), > OPT_END() > }; > > -- > 2.25.1 > -- - Arnaldo
