From: Masami Hiramatsu <mhiramat@kernel.org>
To: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
Ingo Molnar <mingo@redhat.com>,
linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 23/25] selftests/ftrace: Add max stack tracer testcase
Date: Fri, 3 Aug 2018 14:24:14 +0900 [thread overview]
Message-ID: <20180803142414.a4130589e225ff8b05eead74@kernel.org> (raw)
In-Reply-To: <153269404756.3084.16183774834747280299.stgit@devbox>
On Fri, 27 Jul 2018 21:20:47 +0900
Masami Hiramatsu <mhiramat@kernel.org> wrote:
> Add a testcase for max stack tracer, which checks basic
> max stack usage tracing and its filter feature.
>
Hmm, this test sometimes fails. (not always)
Let me check what happens.
Thank you,
> Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
> ---
> .../ftrace/test.d/ftrace/func_stack_tracer.tc | 39 ++++++++++++++++++++
> 1 file changed, 39 insertions(+)
> create mode 100644 tools/testing/selftests/ftrace/test.d/ftrace/func_stack_tracer.tc
>
> diff --git a/tools/testing/selftests/ftrace/test.d/ftrace/func_stack_tracer.tc b/tools/testing/selftests/ftrace/test.d/ftrace/func_stack_tracer.tc
> new file mode 100644
> index 000000000000..b414f0e3c646
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/test.d/ftrace/func_stack_tracer.tc
> @@ -0,0 +1,39 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +# description: ftrace - Max stack tracer
> +# Test the basic function of max-stack usage tracing
> +
> +if [ ! -f stack_trace ]; then
> + echo "Max stack tracer is not supported - please make CONFIG_STACK_TRACER=y"
> + exit_unsupported
> +fi
> +
> +echo > stack_trace_filter
> +echo 0 > stack_max_size
> +echo 1 > /proc/sys/kernel/stack_tracer_enabled
> +
> +: "Fork and wait for the first entry become !lock"
> +timeout=10
> +while [ $timeout -ne 0 ]; do
> + ( echo "forked" )
> + FL=`grep " 0)" stack_trace`
> + echo $FL | grep -q "lock" || break;
> + timeout=$((timeout - 1))
> +done
> +echo 0 > /proc/sys/kernel/stack_tracer_enabled
> +
> +echo '*lock*' > stack_trace_filter
> +test `cat stack_trace_filter | wc -l` -eq `grep lock stack_trace_filter | wc -l`
> +
> +echo 0 > stack_max_size
> +echo 1 > /proc/sys/kernel/stack_tracer_enabled
> +
> +: "Fork and always the first entry including lock"
> +timeout=10
> +while [ $timeout -ne 0 ]; do
> + ( echo "forked" )
> + FL=`grep " 0)" stack_trace`
> + echo $FL | grep -q "lock"
> + timeout=$((timeout - 1))
> +done
> +echo 0 > /proc/sys/kernel/stack_tracer_enabled
>
--
Masami Hiramatsu <mhiramat@kernel.org>
next prev parent reply other threads:[~2018-08-03 5:24 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-27 12:09 [PATCH 00/25] selftests/ftrace: Improve ftracetest with coverage check Masami Hiramatsu
2018-07-27 12:10 ` [PATCH 01/25] tracing: Allow gcov profiling on only ftrace subsystem Masami Hiramatsu
2018-07-27 12:10 ` [PATCH 02/25] selftests/ftrace: Add --stop-fail hidden option for debug Masami Hiramatsu
2018-07-27 12:11 ` [PATCH 03/25] selftests/ftrace: Add --console hidden option Masami Hiramatsu
2018-07-27 12:11 ` [PATCH 04/25] selftests/ftrace: Add case number prefix to logfile Masami Hiramatsu
2018-07-27 12:12 ` [PATCH 05/25] selftests/ftrace: More initialize features in initialize_ftrace Masami Hiramatsu
2018-07-27 12:12 ` [PATCH 06/25] selftests/ftrace: Cleanup ftrace after running test Masami Hiramatsu
2018-07-27 12:13 ` [PATCH 07/25] selftests/ftrace: Remove unneeded per-test init/cleanup ftrace Masami Hiramatsu
2018-07-27 12:13 ` [PATCH 08/25] selftests/ftrace: Fix to test kprobe $comm arg only if available Masami Hiramatsu
2018-07-27 12:14 ` [PATCH 09/25] selftests/ftrace: Fix checkbashisms errors Masami Hiramatsu
2018-07-27 12:14 ` [PATCH 10/25] selftests/ftrace: Use loopback address instead of localhost Masami Hiramatsu
2018-07-27 12:15 ` [PATCH 11/25] selftests/ftrace: Improve kprobe on module testcase to load/unload module Masami Hiramatsu
2018-08-02 1:02 ` Masami Hiramatsu
2018-08-02 7:22 ` Masami Hiramatsu
2018-07-27 12:15 ` [PATCH 12/25] selftests/ftrace: Improve kprobe testcase to check log data Masami Hiramatsu
2018-07-27 12:16 ` [PATCH 13/25] selftests/ftrace: Improve kretprobe " Masami Hiramatsu
2018-07-27 12:16 ` [PATCH 14/25] selftests/ftrace: Test kprobe-event argument with various bitsize Masami Hiramatsu
2018-07-27 12:17 ` [PATCH 15/25] selftests/ftrace: Check set_event_pid result Masami Hiramatsu
2018-07-27 12:17 ` [PATCH 16/25] selftests/ftrace: Add kprobe event with $comm argument testcase Masami Hiramatsu
2018-07-27 12:17 ` [PATCH 17/25] selftests/ftrace: Add kprobe profile testcase Masami Hiramatsu
2018-07-27 12:18 ` [PATCH 18/25] selftests/ftrace: Add a testcase for nop tracer Masami Hiramatsu
2018-07-27 12:18 ` [PATCH 19/25] selftests/ftrace: Add kprobe-event with symbol argument test Masami Hiramatsu
2018-07-27 12:19 ` [PATCH 20/25] selftests/ftrace: Add trace_printk sample module test Masami Hiramatsu
2018-07-27 12:19 ` [PATCH 21/25] selftests/ftrace: Add ringbuffer size changing testcase Masami Hiramatsu
2018-07-27 12:20 ` [PATCH 22/25] selftests/ftrace: Add function profiling stat testcase Masami Hiramatsu
2018-07-27 12:20 ` [PATCH 23/25] selftests/ftrace: Add max stack tracer testcase Masami Hiramatsu
2018-08-03 5:24 ` Masami Hiramatsu [this message]
2018-07-27 12:21 ` [PATCH 24/25] selftests/ftrace: Add function filter on module testcase Masami Hiramatsu
2018-07-27 12:21 ` [PATCH 25/25] selftests/ftrace: Add trace_pipe testcase Masami Hiramatsu
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