From: Changbin Du <changbin.du@gmail.com>
To: Jiri Olsa <jolsa@redhat.com>, Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Namhyung Kim <namhyung@kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
linux-kernel@vger.kernel.org, Changbin Du <changbin.du@gmail.com>
Subject: [PATCH v2 07/15] perf ftrace: show trace column header
Date: Sat, 27 Jun 2020 21:36:46 +0800 [thread overview]
Message-ID: <20200627133654.64863-8-changbin.du@gmail.com> (raw)
In-Reply-To: <20200627133654.64863-1-changbin.du@gmail.com>
This makes perf-ftrace display column header before printing trace.
$ sudo perf ftrace
\# tracer: function
\#
\# entries-in-buffer/entries-written: 0/0 #P:8
\#
\# TASK-PID CPU# TIMESTAMP FUNCTION
\# | | | | |
<...>-9246 [006] 10726.262760: mutex_unlock <-rb_simple_write
<...>-9246 [006] 10726.262764: __fsnotify_parent <-vfs_write
<...>-9246 [006] 10726.262765: fsnotify <-vfs_write
<...>-9246 [006] 10726.262766: __sb_end_write <-vfs_write
<...>-9246 [006] 10726.262767: fpregs_assert_state_consistent <-do_syscall_64
Signed-off-by: Changbin Du <changbin.du@gmail.com>
---
tools/perf/builtin-ftrace.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
index e45496012611..686d744d5025 100644
--- a/tools/perf/builtin-ftrace.c
+++ b/tools/perf/builtin-ftrace.c
@@ -430,6 +430,9 @@ static int __cmd_ftrace(struct perf_ftrace *ftrace, int argc, const char **argv)
fcntl(trace_fd, F_SETFL, O_NONBLOCK);
pollfd.fd = trace_fd;
+ /* display column headers */
+ read_tracing_file_to_stdout("trace");
+
if (!ftrace->initial_delay) {
if (write_tracing_file("tracing_on", "1") < 0) {
pr_err("can't enable tracing\n");
--
2.25.1
next prev parent reply other threads:[~2020-06-27 13:38 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-27 13:36 [PATCH v2 00/15] perf: ftrace enhancement Changbin Du
2020-06-27 13:36 ` [PATCH v2 01/15] perf ftrace: select function/function_graph tracer automatically Changbin Du
2020-07-03 5:47 ` Namhyung Kim
2020-07-07 15:00 ` Changbin Du
2020-06-27 13:36 ` [PATCH v2 02/15] perf ftrace: add option '-F/--funcs' to list available functions Changbin Du
2020-07-03 5:58 ` Namhyung Kim
2020-07-07 15:15 ` Changbin Du
2020-06-27 13:36 ` [PATCH v2 03/15] perf ftrace: add option -t/--tid to filter by thread id Changbin Du
2020-06-27 13:36 ` [PATCH v2 04/15] perf ftrace: add option -d/--delay to delay tracing Changbin Du
2020-06-27 13:36 ` [PATCH v2 05/15] perf ftrace: factor out function write_tracing_file_int() Changbin Du
2020-07-07 16:09 ` Steven Rostedt
2020-07-07 16:10 ` Steven Rostedt
2020-07-08 12:53 ` Changbin Du
2020-07-07 16:24 ` Arnaldo Carvalho de Melo
2020-06-27 13:36 ` [PATCH v2 06/15] perf ftrace: add option '-m/--buffer-size' to set per-cpu buffer size Changbin Du
2020-07-03 6:17 ` Namhyung Kim
2020-06-27 13:36 ` Changbin Du [this message]
2020-07-03 6:20 ` [PATCH v2 07/15] perf ftrace: show trace column header Namhyung Kim
2020-07-03 12:35 ` Arnaldo Carvalho de Melo
2020-07-07 14:06 ` Changbin Du
2020-06-27 13:36 ` [PATCH v2 08/15] perf ftrace: add option '--inherit' to trace children processes Changbin Du
2020-06-27 13:36 ` [PATCH v2 09/15] perf ftrace: add support for tracing option 'func_stack_trace' Changbin Du
2020-07-03 6:30 ` Namhyung Kim
2020-07-07 15:19 ` Changbin Du
2020-06-27 13:36 ` [PATCH v2 10/15] perf ftrace: add support for trace option sleep-time Changbin Du
2020-07-03 6:40 ` Namhyung Kim
2020-07-07 15:35 ` Changbin Du
2020-07-07 16:09 ` Arnaldo Carvalho de Melo
2020-07-08 12:59 ` Changbin Du
2020-06-27 13:36 ` [PATCH v2 11/15] perf ftrace: add support for trace option funcgraph-irqs Changbin Du
2020-07-03 6:43 ` Namhyung Kim
2020-06-27 13:36 ` [PATCH v2 12/15] perf ftrace: add support for tracing option 'irq-info' Changbin Du
2020-06-27 13:36 ` [PATCH v2 13/15] perf ftrace: add option '--graph-verbose' to show more info for graph tracer Changbin Du
2020-06-27 13:36 ` [PATCH v2 14/15] perf ftrace: add support for trace option tracing_thresh Changbin Du
2020-06-27 13:36 ` [PATCH v2 15/15] perf ftrace: add change log Changbin Du
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