Sometimes we want ftrace display more and longer information about trace.
$ sudo perf ftrace -G -l
6800.190937 | 4) <...>-7683 | 2.072 us | mutex_unlock();
6800.190941 | 4) <...>-7683 | 2.171 us | __fsnotify_parent();
6800.190943 | 4) <...>-7683 | 1.497 us | fsnotify();
6800.190944 | 4) <...>-7683 | 0.775 us | __sb_end_write();
6800.190945 | 4) <...>-7683 | 0.854 us |
fpregs_assert_state_consistent();
6800.190947 | 4) <...>-7683 | | do_syscall_64() {
6800.190948 | 4) <...>-7683 | | __x64_sys_close() {
6800.190948 | 4) <...>-7683 | | __close_fd() {
6800.190948 | 4) <...>-7683 | 0.322 us | _raw_spin_lock();
6800.190949 | 4) <...>-7683 | | filp_close() {
6800.190949 | 4) <...>-7683 | 0.320 us | dnotify_flush();
6800.190950 | 4) <...>-7683 | 0.325 us |
locks_remove_posix();
Signed-off-by: Changbin Du <[email protected]>
---
tools/perf/builtin-ftrace.c | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
index b16600a16efa..f11f2d3431b0 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 long_info;
};
struct filter_entry {
@@ -190,6 +191,9 @@ 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("irq-info", "0");
}
static int reset_tracing_files(struct perf_ftrace *ftrace __maybe_unused)
@@ -371,6 +375,23 @@ static int set_tracing_funcgraph_irqs(struct perf_ftrace
*ftrace)
return 0;
}
+static int set_tracing_long_info(struct perf_ftrace *ftrace)
+{
+ if (!ftrace->long_info)
+ 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("irq-info", "1") < 0)
+ return -1;
+
+ return 0;
+}
+
static int __cmd_ftrace(struct perf_ftrace *ftrace, int argc, const char
**argv)
{
char *trace_file;
@@ -449,6 +470,11 @@ static int __cmd_ftrace(struct perf_ftrace *ftrace, int
argc, const char **argv)
goto out_reset;
}
+ if (set_tracing_long_info(ftrace) < 0) {
+ pr_err("failed to set tracing option
funcgraph-proc/funcgraph-abstime/irq-info\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;
@@ -588,6 +614,8 @@ 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('l', "long-info", &ftrace.long_info,
+ "Show process names, PIDs, timestamps, irq-info if
available"),
OPT_END()
};
--
2.25.1
