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perf ftrace: Add support for tracing option 'irq-info'
This adds support to display irq context info for function tracer. To do this, just specify a '--func-opts irq-info' option. Signed-off-by: Changbin Du <changbin.du@gmail.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt (VMware) <rostedt@goodmis.org> Link: http://lore.kernel.org/lkml/20200808023141.14227-12-changbin.du@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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d1bcf17cda
commit
c81fc34e31
2 changed files with 21 additions and 1 deletions
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@ -79,6 +79,7 @@ OPTIONS
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--func-opts::
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--func-opts::
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List of options allowed to set:
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List of options allowed to set:
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call-graph - Display kernel stack trace for function tracer.
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call-graph - Display kernel stack trace for function tracer.
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irq-info - Display irq context info for function tracer.
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-G::
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-G::
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--graph-funcs=::
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--graph-funcs=::
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@ -44,6 +44,7 @@ struct perf_ftrace {
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unsigned long percpu_buffer_size;
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unsigned long percpu_buffer_size;
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bool inherit;
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bool inherit;
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int func_stack_trace;
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int func_stack_trace;
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int func_irq_info;
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int graph_nosleep_time;
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int graph_nosleep_time;
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int graph_noirqs;
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int graph_noirqs;
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};
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};
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@ -209,6 +210,7 @@ static void reset_tracing_options(struct perf_ftrace *ftrace __maybe_unused)
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write_tracing_option_file("func_stack_trace", "0");
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write_tracing_option_file("func_stack_trace", "0");
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write_tracing_option_file("sleep-time", "1");
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write_tracing_option_file("sleep-time", "1");
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write_tracing_option_file("funcgraph-irqs", "1");
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write_tracing_option_file("funcgraph-irqs", "1");
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write_tracing_option_file("irq-info", "0");
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}
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}
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static int reset_tracing_files(struct perf_ftrace *ftrace __maybe_unused)
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static int reset_tracing_files(struct perf_ftrace *ftrace __maybe_unused)
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@ -296,6 +298,17 @@ static int set_tracing_func_stack_trace(struct perf_ftrace *ftrace)
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return 0;
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return 0;
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}
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}
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static int set_tracing_func_irqinfo(struct perf_ftrace *ftrace)
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{
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if (!ftrace->func_irq_info)
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return 0;
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if (write_tracing_option_file("irq-info", "1") < 0)
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return -1;
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return 0;
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}
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static int reset_tracing_cpu(void)
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static int reset_tracing_cpu(void)
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{
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{
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struct perf_cpu_map *cpumap = perf_cpu_map__new(NULL);
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struct perf_cpu_map *cpumap = perf_cpu_map__new(NULL);
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@ -471,6 +484,11 @@ static int __cmd_ftrace(struct perf_ftrace *ftrace, int argc, const char **argv)
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goto out_reset;
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goto out_reset;
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}
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}
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if (set_tracing_func_irqinfo(ftrace) < 0) {
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pr_err("failed to set tracing option irq-info\n");
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goto out_reset;
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}
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if (set_tracing_filters(ftrace) < 0) {
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if (set_tracing_filters(ftrace) < 0) {
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pr_err("failed to set tracing filters\n");
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pr_err("failed to set tracing filters\n");
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goto out_reset;
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goto out_reset;
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@ -660,6 +678,7 @@ static int parse_func_tracer_opts(const struct option *opt,
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struct perf_ftrace *ftrace = (struct perf_ftrace *) opt->value;
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struct perf_ftrace *ftrace = (struct perf_ftrace *) opt->value;
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struct sublevel_option func_tracer_opts[] = {
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struct sublevel_option func_tracer_opts[] = {
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{ .name = "call-graph", .value_ptr = &ftrace->func_stack_trace },
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{ .name = "call-graph", .value_ptr = &ftrace->func_stack_trace },
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{ .name = "irq-info", .value_ptr = &ftrace->func_irq_info },
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{ .name = NULL, }
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{ .name = NULL, }
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};
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};
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@ -742,7 +761,7 @@ int cmd_ftrace(int argc, const char **argv)
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OPT_CALLBACK('N', "notrace-funcs", &ftrace.notrace, "func",
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OPT_CALLBACK('N', "notrace-funcs", &ftrace.notrace, "func",
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"do not trace given functions", parse_filter_func),
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"do not trace given functions", parse_filter_func),
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OPT_CALLBACK(0, "func-opts", &ftrace, "options",
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OPT_CALLBACK(0, "func-opts", &ftrace, "options",
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"function tracer options, available options: call-graph",
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"function tracer options, available options: call-graph,irq-info",
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parse_func_tracer_opts),
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parse_func_tracer_opts),
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OPT_CALLBACK('G', "graph-funcs", &ftrace.graph_funcs, "func",
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OPT_CALLBACK('G', "graph-funcs", &ftrace.graph_funcs, "func",
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"trace given functions using function_graph tracer",
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"trace given functions using function_graph tracer",
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