Messages in this thread Patch in this message | | | From | Changbin Du <> | Subject | [PATCH v2 13/15] perf ftrace: add option '--graph-verbose' to show more info for graph tracer | Date | Sat, 27 Jun 2020 21:36:52 +0800 |
| |
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-verbose 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 | 3 +++ tools/perf/builtin-ftrace.c | 28 ++++++++++++++++++++++++ 2 files changed, 31 insertions(+)
diff --git a/tools/perf/Documentation/perf-ftrace.txt b/tools/perf/Documentation/perf-ftrace.txt index 3c9eb044b7eb..cc770fc0a1e8 100644 --- a/tools/perf/Documentation/perf-ftrace.txt +++ b/tools/perf/Documentation/perf-ftrace.txt @@ -113,6 +113,9 @@ OPTIONS --graph-noirqs:: Ignore functions that happen inside interrupt for function_graph tracer. +--graph-verbose:: + Show process names, PIDs, timestamps 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 0a1e481b66a0..e037fe7abd47 100644 --- a/tools/perf/builtin-ftrace.c +++ b/tools/perf/builtin-ftrace.c @@ -45,6 +45,7 @@ struct perf_ftrace { bool func_irq_info; bool graph_nosleep_time; bool graph_noirqs; + bool 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"); } @@ -419,6 +423,23 @@ 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; @@ -513,6 +534,11 @@ 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; @@ -698,6 +724,8 @@ int cmd_ftrace(int argc, const char **argv) "measure on-CPU time only for function_graph tracer"), OPT_BOOLEAN(0, "graph-noirqs", &ftrace.graph_noirqs, "ignore functions that happen inside interrupt for function_graph tracer"), + OPT_BOOLEAN(0, "graph-verbose", &ftrace.graph_verbose, + "show process names, PIDs, timestamps for function_graph tracer"), OPT_END() }; -- 2.25.1
| |