Messages in this thread Patch in this message | | | From | Changbin Du <> | Subject | [PATCH 10/19] perf ftrace: add support for trace option funcgraph-tail | Date | Sun, 10 May 2020 23:06:19 +0800 |
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This adds an option '--funcgraph-tail' for function graph tracer.
Signed-off-by: Changbin Du <changbin.du@gmail.com> --- 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 20bc14d6c5fb..2ef5d1c4b23c 100644 --- a/tools/perf/builtin-ftrace.c +++ b/tools/perf/builtin-ftrace.c @@ -42,6 +42,7 @@ struct perf_ftrace { bool func_stack_trace; bool nosleep_time; bool nofuncgraph_irqs; + bool funcgraph_tail; bool long_info; unsigned tracing_thresh; }; @@ -192,6 +193,7 @@ 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"); + write_tracing_option_file("funcgraph-tail", "0"); write_tracing_option_file("funcgraph-proc", "0"); write_tracing_option_file("funcgraph-abstime", "0"); write_tracing_option_file("irq-info", "0"); @@ -411,6 +413,17 @@ static int set_tracing_thresh(struct perf_ftrace *ftrace) return 0; } +static int set_tracing_funcgraph_tail(struct perf_ftrace *ftrace) +{ + if (!ftrace->funcgraph_tail) + return 0; + + if (write_tracing_option_file("funcgraph-tail", "1") < 0) + return -1; + + return 0; +} + static int __cmd_ftrace(struct perf_ftrace *ftrace, int argc, const char **argv) { char *trace_file; @@ -499,6 +512,11 @@ static int __cmd_ftrace(struct perf_ftrace *ftrace, int argc, const char **argv) goto out_reset; } + if (set_tracing_funcgraph_tail(ftrace) < 0) { + pr_err("failed to set tracing option funcgraph-tail\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; @@ -638,6 +656,8 @@ int cmd_ftrace(int argc, const char **argv) "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_BOOLEAN(0, "funcgraph-tail", &ftrace.funcgraph_tail, + "Show function tails comment (function_graph only)"), OPT_BOOLEAN('l', "long-info", &ftrace.long_info, "Show process names, PIDs, timestamps, irq-info if available"), OPT_UINTEGER(0, "tracing-thresh", &ftrace.tracing_thresh, -- 2.25.1
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