From: Steven Rostedt <rostedt@goodmis.org>
To: Joel Fernandes <joel@joelfernandes.org>
Cc: linux-kernel@vger.kernel.org, Boqun Feng <boqun.feng@gmail.com>,
Byungchul Park <byungchul.park@lge.com>,
Ingo Molnar <mingo@redhat.com>, Julia Cartwright <julia@ni.com>,
linux-kselftest@vger.kernel.org,
Masami Hiramatsu <mhiramat@kernel.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Namhyung Kim <namhyung@kernel.org>,
Paul McKenney <paulmck@linux.vnet.ibm.com>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Glexiner <tglx@linutronix.de>,
Tom Zanussi <tom.zanussi@linux.intel.com>
Subject: Re: [PATCH v9 7/7] kselftests: Add tests for the preemptoff and irqsoff tracers
Date: Tue, 10 Jul 2018 20:49:58 -0400 [thread overview]
Message-ID: <20180710204958.22910589@gandalf.local.home> (raw)
In-Reply-To: <20180628182149.226164-8-joel@joelfernandes.org>
On Thu, 28 Jun 2018 11:21:49 -0700
Joel Fernandes <joel@joelfernandes.org> wrote:
> From: "Joel Fernandes (Google)" <joel@joelfernandes.org>
>
> Here we add unit tests for the preemptoff and irqsoff tracer by using a
> kernel module introduced previously to trigger atomic sections in the
> kernel.
>
> Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
> Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
> Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
This looks fine. The only patch that needs to be changed and resent is
patch 6 and 7. Just send 6, and this one again because it depends on
patch 6.
I'll go ahead and apply 1-5 and kick off my other tests.
Thanks!
-- Steve
> ---
> tools/testing/selftests/ftrace/config | 3 +
> .../test.d/preemptirq/irqsoff_tracer.tc | 73 +++++++++++++++++++
> 2 files changed, 76 insertions(+)
> create mode 100644 tools/testing/selftests/ftrace/test.d/preemptirq/irqsoff_tracer.tc
>
> diff --git a/tools/testing/selftests/ftrace/config b/tools/testing/selftests/ftrace/config
> index b01924c71c09..29588b328345 100644
> --- a/tools/testing/selftests/ftrace/config
> +++ b/tools/testing/selftests/ftrace/config
> @@ -4,3 +4,6 @@ CONFIG_FUNCTION_PROFILER=y
> CONFIG_TRACER_SNAPSHOT=y
> CONFIG_STACK_TRACER=y
> CONFIG_HIST_TRIGGERS=y
> +CONFIG_PREEMPT_TRACER=y
> +CONFIG_IRQSOFF_TRACER=y
> +CONFIG_TEST_ATOMIC_SECTIONS=m
> diff --git a/tools/testing/selftests/ftrace/test.d/preemptirq/irqsoff_tracer.tc b/tools/testing/selftests/ftrace/test.d/preemptirq/irqsoff_tracer.tc
> new file mode 100644
> index 000000000000..1806d340035d
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/test.d/preemptirq/irqsoff_tracer.tc
> @@ -0,0 +1,73 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +# description: test for the preemptirqsoff tracer
> +
> +MOD=test_atomic_sections
> +
> +fail() {
> + reset_tracer
> + rmmod $MOD || true
> + exit_fail
> +}
> +
> +unsup() { #msg
> + reset_tracer
> + rmmod $MOD || true
> + echo $1
> + exit_unsupported
> +}
> +
> +modprobe $MOD || unsup "$MOD module not available"
> +rmmod $MOD
> +
> +grep -q "preemptoff" available_tracers || unsup "preemptoff tracer not enabled"
> +grep -q "irqsoff" available_tracers || unsup "irqsoff tracer not enabled"
> +
> +reset_tracer
> +
> +# Simulate preemptoff section for half a second couple of times
> +echo preemptoff > current_tracer
> +sleep 1
> +modprobe $MOD atomic_mode=preempt atomic_time=500000 || fail
> +rmmod $MOD || fail
> +modprobe $MOD atomic_mode=preempt atomic_time=500000 || fail
> +rmmod $MOD || fail
> +modprobe $MOD atomic_mode=preempt atomic_time=500000 || fail
> +rmmod $MOD || fail
> +
> +cat trace
> +
> +# Confirm which tracer
> +grep -q "tracer: preemptoff" trace || fail
> +
> +# Check the end of the section
> +egrep -q "5.....us : <stack trace>" trace || fail
> +
> +# Check for 500ms of latency
> +egrep -q "latency: 5..... us" trace || fail
> +
> +reset_tracer
> +
> +# Simulate irqsoff section for half a second couple of times
> +echo irqsoff > current_tracer
> +sleep 1
> +modprobe $MOD atomic_mode=irq atomic_time=500000 || fail
> +rmmod $MOD || fail
> +modprobe $MOD atomic_mode=irq atomic_time=500000 || fail
> +rmmod $MOD || fail
> +modprobe $MOD atomic_mode=irq atomic_time=500000 || fail
> +rmmod $MOD || fail
> +
> +cat trace
> +
> +# Confirm which tracer
> +grep -q "tracer: irqsoff" trace || fail
> +
> +# Check the end of the section
> +egrep -q "5.....us : <stack trace>" trace || fail
> +
> +# Check for 500ms of latency
> +egrep -q "latency: 5..... us" trace || fail
> +
> +reset_tracer
> +exit 0
next prev parent reply other threads:[~2018-07-11 0:50 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-28 18:21 [PATCH v9 0/7] Centralize and unify usage of preempt/irq tracepoints Joel Fernandes
2018-06-28 18:21 ` [PATCH v9 1/7] srcu: Add notrace variants of srcu_read_{lock,unlock} Joel Fernandes
2018-06-28 18:21 ` [PATCH v9 2/7] srcu: Add notrace variant of srcu_dereference Joel Fernandes
2018-06-28 18:21 ` [PATCH v9 3/7] trace/irqsoff: Split reset into separate functions Joel Fernandes
2018-06-28 18:21 ` [PATCH v9 4/7] tracepoint: Make rcuidle tracepoint callers use SRCU Joel Fernandes
2018-07-11 12:49 ` Peter Zijlstra
2018-07-11 13:00 ` Steven Rostedt
2018-07-11 14:27 ` Paul E. McKenney
2018-07-11 14:46 ` Steven Rostedt
2018-07-11 15:15 ` Paul E. McKenney
2018-07-11 20:56 ` Joel Fernandes
2018-07-12 1:22 ` Steven Rostedt
2018-07-12 2:35 ` Joel Fernandes
2018-07-11 20:52 ` Joel Fernandes
2018-07-12 3:21 ` Steven Rostedt
2018-07-12 4:28 ` Joel Fernandes
2018-07-12 13:35 ` Steven Rostedt
2018-07-12 19:17 ` Joel Fernandes
2018-07-12 20:15 ` Steven Rostedt
2018-07-12 20:29 ` Joel Fernandes
2018-07-12 20:31 ` Steven Rostedt
2018-07-11 12:53 ` Peter Zijlstra
2018-07-12 2:32 ` Joel Fernandes
2018-07-11 12:56 ` Peter Zijlstra
2018-07-11 13:06 ` Steven Rostedt
2018-07-11 15:17 ` Peter Zijlstra
2018-07-11 15:26 ` Steven Rostedt
2018-07-11 16:46 ` Mathieu Desnoyers
2018-07-11 16:40 ` Mathieu Desnoyers
2018-07-12 0:31 ` Joel Fernandes
2018-07-12 1:26 ` Steven Rostedt
2018-06-28 18:21 ` [PATCH v9 5/7] tracing: Centralize preemptirq tracepoints and unify their usage Joel Fernandes
2018-07-06 22:06 ` Steven Rostedt
2018-07-07 4:20 ` Joel Fernandes
2018-07-10 14:20 ` Steven Rostedt
2018-07-10 17:33 ` Joel Fernandes
2018-07-11 13:12 ` Peter Zijlstra
2018-07-11 13:19 ` Steven Rostedt
2018-07-11 13:22 ` Steven Rostedt
2018-07-12 8:38 ` Joel Fernandes
2018-07-12 13:37 ` Steven Rostedt
2018-07-12 0:44 ` Joel Fernandes
2018-06-28 18:21 ` [PATCH v9 6/7] lib: Add module to simulate atomic sections for testing preemptoff tracers Joel Fernandes
2018-07-11 0:47 ` Steven Rostedt
2018-07-11 5:26 ` Joel Fernandes
2018-06-28 18:21 ` [PATCH v9 7/7] kselftests: Add tests for the preemptoff and irqsoff tracers Joel Fernandes
2018-07-11 0:49 ` Steven Rostedt [this message]
2018-07-11 5:27 ` Joel Fernandes
2018-07-03 14:15 ` [PATCH v9 0/7] Centralize and unify usage of preempt/irq tracepoints Joel Fernandes
2018-07-03 14:23 ` Steven Rostedt
-- strict thread matches above, loose matches on Subject: below --
2018-06-21 22:32 Joel Fernandes
2018-06-21 22:32 ` [PATCH v9 7/7] kselftests: Add tests for the preemptoff and irqsoff tracers Joel Fernandes
2018-06-25 13:13 ` Masami Hiramatsu
2018-06-25 16:21 ` Joel Fernandes
2018-06-27 12:21 ` Masami Hiramatsu
2018-06-07 20:38 [PATCH v9 0/7] Centralize and unify usage of preempt/irq Joel Fernandes
2018-06-07 20:38 ` [PATCH v9 7/7] kselftests: Add tests for the preemptoff and irqsoff tracers Joel Fernandes
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