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From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Masami Hiramatsu <mhiramat@kernel.org>,
	Alexei Starovoitov <alexei.starovoitov@gmail.com>,
	Peter Wu <peter@lekensteyn.nl>, Jonathan Corbet <corbet@lwn.net>,
	Tom Zanussi <zanussi@kernel.org>,
	Shuah Khan <shuahkhan@gmail.com>, bpf <bpf@vger.kernel.org>,
	Shuah Khan <skhan@linuxfoundation.org>,
	linux-kselftest@vger.kernel.org
Subject: [PATCH 01/12 v2] selftest/ftrace: Fix function trigger test to handle trace not disabling the tracer
Date: Thu, 19 Mar 2020 19:22:20 -0400	[thread overview]
Message-ID: <20200319232731.618036981@goodmis.org> (raw)
In-Reply-To: 20200319232219.446480829@goodmis.org

From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>

The ftrace selftest "ftrace - test for function traceon/off triggers"
enables all events and reads the trace file. Now that the trace file does
not disable tracing, and will attempt to continually read new data that is
added, the selftest gets stuck reading the trace file. This is because the
data added to the trace file will fill up quicker than the reading of it.

By only enabling scheduling events, the read can keep up with the writes.
Instead of enabling all events, only enable the scheduler events.

Link: http://lkml.kernel.org/r/20200318111345.0516642e@gandalf.local.home

Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: linux-kselftest@vger.kernel.org
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
 .../selftests/ftrace/test.d/ftrace/func_traceonoff_triggers.tc  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/ftrace/test.d/ftrace/func_traceonoff_triggers.tc b/tools/testing/selftests/ftrace/test.d/ftrace/func_traceonoff_triggers.tc
index 0c04282d33dd..1947387fe976 100644
--- a/tools/testing/selftests/ftrace/test.d/ftrace/func_traceonoff_triggers.tc
+++ b/tools/testing/selftests/ftrace/test.d/ftrace/func_traceonoff_triggers.tc
@@ -41,7 +41,7 @@ fi
 
 echo '** ENABLE EVENTS'
 
-echo 1 > events/enable
+echo 1 > events/sched/enable
 
 echo '** ENABLE TRACING'
 enable_tracing
-- 
2.25.1



  reply	other threads:[~2020-03-19 23:27 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-19 23:22 [PATCH 00/12 v2] ring-buffer/tracing: Remove disabling of ring buffer while reading trace file Steven Rostedt
2020-03-19 23:22 ` Steven Rostedt [this message]
2020-03-19 23:22 ` [PATCH 02/12 v2] tracing: Save off entry when peeking at next entry Steven Rostedt
2020-03-20  2:57   ` Masami Hiramatsu
2020-03-26  9:12   ` [tracing] cd8f62b481: BUG:sleeping_function_called_from_invalid_context_at_mm/slab.h kernel test robot
2020-03-26  9:12     ` kernel test robot
2020-04-01 14:07     ` Masami Hiramatsu
2020-04-01 14:07       ` Masami Hiramatsu
2020-04-01 14:21       ` Steven Rostedt
2020-04-01 14:21         ` Steven Rostedt
2020-04-01 15:04         ` Steven Rostedt
2020-04-01 15:04           ` Steven Rostedt
2020-04-02  7:19           ` Masami Hiramatsu
2020-04-02  7:19             ` Masami Hiramatsu
2020-04-02 18:14             ` Steven Rostedt
2020-04-02 18:14               ` Steven Rostedt
2020-04-03  6:47               ` Masami Hiramatsu
2020-04-03  6:47                 ` Masami Hiramatsu
2020-04-03 13:16                 ` Steven Rostedt
2020-04-03 13:16                   ` Steven Rostedt
2020-03-19 23:22 ` [PATCH 03/12 v2] ring-buffer: Have ring_buffer_empty() not depend on tracing stopped Steven Rostedt
2020-03-19 23:22 ` [PATCH 04/12 v2] ring-buffer: Rename ring_buffer_read() to read_buffer_iter_advance() Steven Rostedt
2020-03-19 23:22 ` [PATCH 05/12 v2] ring-buffer: Add page_stamp to iterator for synchronization Steven Rostedt
2020-03-19 23:22 ` [PATCH 06/12 v2] ring-buffer: Have rb_iter_head_event() handle concurrent writer Steven Rostedt
2020-03-19 23:22 ` [PATCH 07/12 v2] ring-buffer: Do not die if rb_iter_peek() fails more than thrice Steven Rostedt
2020-03-19 23:22 ` [PATCH 08/12 v2] ring-buffer: Optimize rb_iter_head_event() Steven Rostedt
2020-03-19 23:22 ` [PATCH 09/12 v2] ring-buffer: Do not disable recording when there is an iterator Steven Rostedt
2020-03-19 23:22 ` [PATCH 10/12 v2] tracing: Do not disable tracing when reading the trace file Steven Rostedt
2020-03-19 23:22 ` [PATCH 11/12 v2] ring-buffer/tracing: Have iterator acknowledge dropped events Steven Rostedt
2020-03-19 23:22 ` [PATCH 12/12 v2] tracing: Have the document reflect that the trace file keeps tracing enabled Steven Rostedt
2020-03-21 19:13 ` [PATCH 00/12 v2] ring-buffer/tracing: Remove disabling of ring buffer while reading trace file David Laight
2020-03-22 18:07   ` Steven Rostedt
2020-03-27  1:46   ` Steven Rostedt
2020-03-27 10:07     ` David Laight
2020-03-27 14:30       ` Steven Rostedt
2020-03-27 14:56         ` David Laight

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