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* [PATCH 2/2] kselftests: ftrace: Add tests for the preemptoff and irqsoff tracers
       [not found] <20180518015421.129868-1-joel@joelfernandes.org>
@ 2018-05-18  1:54 ` Joel Fernandes (Google)
  2018-05-18 15:32   ` Masami Hiramatsu
  0 siblings, 1 reply; 4+ messages in thread
From: Joel Fernandes (Google) @ 2018-05-18  1:54 UTC (permalink / raw)
  To: linux-kernel
  Cc: Joel Fernandes (Google),
	Steven Rostedt, Peter Zilstra, Ingo Molnar, Mathieu Desnoyers,
	Tom Zanussi, Namhyung Kim, Thomas Glexiner, Boqun Feng,
	Paul McKenney, Masami Hiramatsu, Todd Kjos, Erick Reyes,
	Julia Cartwright, kernel-team

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.

Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zilstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Tom Zanussi <tom.zanussi@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Thomas Glexiner <tglx@linutronix.de>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Todd Kjos <tkjos@google.com>
Cc: Erick Reyes <erickreyes@google.com>
Cc: Julia Cartwright <julia@ni.com>
Cc: kernel-team@android.com
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
---
 tools/testing/selftests/ftrace/config         |  3 +
 .../test.d/preemptirq/irqsoff_tracer.tc       | 74 +++++++++++++++++++
 2 files changed, 77 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..b76d781c5645
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/preemptirq/irqsoff_tracer.tc
@@ -0,0 +1,74 @@
+#!/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 "preemptoff" available_tracers || unsup "preemptoff tracer not enabled"
+grep "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 test_atomic_sections atomic_mode=preempt atomic_time=500000 || fail
+rmmod test_atomic_sections || fail
+modprobe test_atomic_sections atomic_mode=preempt atomic_time=500000 || fail
+rmmod test_atomic_sections || fail
+modprobe test_atomic_sections atomic_mode=preempt atomic_time=500000 || fail
+rmmod test_atomic_sections || fail
+
+cat trace
+
+# Confirm which tracer
+grep "tracer: preemptoff" trace || fail
+
+# Check the end of the section
+egrep "5.....us : <stack trace>" trace || fail
+
+# Check for 500ms of latency
+egrep "latency: 5..... us" trace || fail
+
+reset_tracer
+
+# Simulate irqsoff section for half a second couple of times
+echo irqsoff > current_tracer
+sleep 1
+modprobe test_atomic_sections atomic_mode=irq atomic_time=500000 || fail
+rmmod test_atomic_sections || fail
+modprobe test_atomic_sections atomic_mode=irq atomic_time=500000 || fail
+rmmod test_atomic_sections || fail
+modprobe test_atomic_sections atomic_mode=irq atomic_time=500000 || fail
+rmmod test_atomic_sections || fail
+
+cat trace
+
+# Confirm which tracer
+grep "tracer: irqsoff" trace || fail
+
+# Check the end of the section
+egrep "5.....us : <stack trace>" trace || fail
+
+# Check for 500ms of latency
+egrep "latency: 5..... us" trace || fail
+
+reset_tracer
+exit 0
+
-- 
2.17.0.441.gb46fe60e1d-goog

^ permalink raw reply related	[flat|nested] 4+ messages in thread
* Re: [PATCH 2/2] kselftests: ftrace: Add tests for the preemptoff and irqsoff tracers
  2018-05-18  1:54 ` [PATCH 2/2] kselftests: ftrace: Add tests for the preemptoff and irqsoff tracers Joel Fernandes (Google)
@ 2018-05-18 15:32   ` Masami Hiramatsu
  2018-05-18 17:00     ` Joel Fernandes
  0 siblings, 1 reply; 4+ messages in thread
From: Masami Hiramatsu @ 2018-05-18 15:32 UTC (permalink / raw)
  To: Joel Fernandes (Google)
  Cc: linux-kernel, Steven Rostedt, Peter Zilstra, Ingo Molnar,
	Mathieu Desnoyers, Tom Zanussi, Namhyung Kim, Thomas Glexiner,
	Boqun Feng, Paul McKenney, Masami Hiramatsu, Todd Kjos,
	Erick Reyes, Julia Cartwright, kernel-team

Hi Joel,

55ty jmnOn Thu, 17 May 2018 18:54:21 -0700
"Joel Fernandes (Google)" <joel@joelfernandes.org> wrote:

> 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.
> 
> Cc: Steven Rostedt <rostedt@goodmis.org>
> Cc: Peter Zilstra <peterz@infradead.org>
> Cc: Ingo Molnar <mingo@redhat.com>
> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
> Cc: Tom Zanussi <tom.zanussi@linux.intel.com>
> Cc: Namhyung Kim <namhyung@kernel.org>
> Cc: Thomas Glexiner <tglx@linutronix.de>
> Cc: Boqun Feng <boqun.feng@gmail.com>
> Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
> Cc: Masami Hiramatsu <mhiramat@kernel.org>
> Cc: Todd Kjos <tkjos@google.com>
> Cc: Erick Reyes <erickreyes@google.com>
> Cc: Julia Cartwright <julia@ni.com>
> Cc: kernel-team@android.com
> Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
> ---
>  tools/testing/selftests/ftrace/config         |  3 +
>  .../test.d/preemptirq/irqsoff_tracer.tc       | 74 +++++++++++++++++++
>  2 files changed, 77 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..b76d781c5645
> --- /dev/null
> +++ b/tools/testing/selftests/ftrace/test.d/preemptirq/irqsoff_tracer.tc
> @@ -0,0 +1,74 @@
> +#!/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 "preemptoff" available_tracers || unsup "preemptoff tracer not enabled"
> +grep "irqsoff" available_tracers || unsup "irqsoff tracer not enabled"

Could you pass "-q" for all grep command in this script if it just for checking the pattern exists?

Thank you,

> +
> +reset_tracer
> +
> +# Simulate preemptoff section for half a second couple of times
> +echo preemptoff > current_tracer
> +sleep 1
> +modprobe test_atomic_sections atomic_mode=preempt atomic_time=500000 || fail
> +rmmod test_atomic_sections || fail
> +modprobe test_atomic_sections atomic_mode=preempt atomic_time=500000 || fail
> +rmmod test_atomic_sections || fail
> +modprobe test_atomic_sections atomic_mode=preempt atomic_time=500000 || fail
> +rmmod test_atomic_sections || fail
> +
> +cat trace
> +
> +# Confirm which tracer
> +grep "tracer: preemptoff" trace || fail
> +
> +# Check the end of the section
> +egrep "5.....us : <stack trace>" trace || fail
> +
> +# Check for 500ms of latency
> +egrep "latency: 5..... us" trace || fail
> +
> +reset_tracer
> +
> +# Simulate irqsoff section for half a second couple of times
> +echo irqsoff > current_tracer
> +sleep 1
> +modprobe test_atomic_sections atomic_mode=irq atomic_time=500000 || fail
> +rmmod test_atomic_sections || fail
> +modprobe test_atomic_sections atomic_mode=irq atomic_time=500000 || fail
> +rmmod test_atomic_sections || fail
> +modprobe test_atomic_sections atomic_mode=irq atomic_time=500000 || fail
> +rmmod test_atomic_sections || fail
> +
> +cat trace
> +
> +# Confirm which tracer
> +grep "tracer: irqsoff" trace || fail
> +
> +# Check the end of the section
> +egrep "5.....us : <stack trace>" trace || fail
> +
> +# Check for 500ms of latency
> +egrep "latency: 5..... us" trace || fail
> +
> +reset_tracer
> +exit 0
> +
> -- 
> 2.17.0.441.gb46fe60e1d-goog
> 


-- 
Masami Hiramatsu <mhiramat@kernel.org>

^ permalink raw reply	[flat|nested] 4+ messages in thread
* Re: [PATCH 2/2] kselftests: ftrace: Add tests for the preemptoff and irqsoff tracers
  2018-05-18 15:32   ` Masami Hiramatsu
@ 2018-05-18 17:00     ` Joel Fernandes
  0 siblings, 0 replies; 4+ messages in thread
From: Joel Fernandes @ 2018-05-18 17:00 UTC (permalink / raw)
  To: Masami Hiramatsu
  Cc: linux-kernel, Steven Rostedt, Peter Zilstra, Ingo Molnar,
	Mathieu Desnoyers, Tom Zanussi, Namhyung Kim, Thomas Glexiner,
	Boqun Feng, Paul McKenney, Todd Kjos, Erick Reyes,
	Julia Cartwright, kernel-team

On Sat, May 19, 2018 at 12:32:41AM +0900, Masami Hiramatsu wrote:
> Hi Joel,
> 
> 55ty jmnOn Thu, 17 May 2018 18:54:21 -0700
> "Joel Fernandes (Google)" <joel@joelfernandes.org> wrote:
> 
> > 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.
> > 
> > Cc: Steven Rostedt <rostedt@goodmis.org>
> > Cc: Peter Zilstra <peterz@infradead.org>
> > Cc: Ingo Molnar <mingo@redhat.com>
> > Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
> > Cc: Tom Zanussi <tom.zanussi@linux.intel.com>
> > Cc: Namhyung Kim <namhyung@kernel.org>
> > Cc: Thomas Glexiner <tglx@linutronix.de>
> > Cc: Boqun Feng <boqun.feng@gmail.com>
> > Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
> > Cc: Masami Hiramatsu <mhiramat@kernel.org>
> > Cc: Todd Kjos <tkjos@google.com>
> > Cc: Erick Reyes <erickreyes@google.com>
> > Cc: Julia Cartwright <julia@ni.com>
> > Cc: kernel-team@android.com
> > Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
> > ---
> >  tools/testing/selftests/ftrace/config         |  3 +
> >  .../test.d/preemptirq/irqsoff_tracer.tc       | 74 +++++++++++++++++++
> >  2 files changed, 77 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..b76d781c5645
> > --- /dev/null
> > +++ b/tools/testing/selftests/ftrace/test.d/preemptirq/irqsoff_tracer.tc
> > @@ -0,0 +1,74 @@
> > +#!/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 "preemptoff" available_tracers || unsup "preemptoff tracer not enabled"
> > +grep "irqsoff" available_tracers || unsup "irqsoff tracer not enabled"
> 
> Could you pass "-q" for all grep command in this script if it just for checking the pattern exists?

Fixed, thanks!

Will send out update rolled into the series its testing.

- Joel

^ permalink raw reply	[flat|nested] 4+ messages in thread
* [PATCH 2/2] kselftests: ftrace: Add tests for the preemptoff and irqsoff tracers
  2018-05-18  1:59 [PATCH RFC 0/2] Tests for " Joel Fernandes
@ 2018-05-18  1:59 ` Joel Fernandes
  0 siblings, 0 replies; 4+ messages in thread
From: Joel Fernandes @ 2018-05-18  1:59 UTC (permalink / raw)
  To: linux-kernel
  Cc: Joel Fernandes (Google),
	Steven Rostedt, Peter Zilstra, Ingo Molnar, Mathieu Desnoyers,
	Tom Zanussi, Namhyung Kim, Thomas Glexiner, Boqun Feng,
	Paul McKenney, Masami Hiramatsu, Todd Kjos, Erick Reyes,
	Julia Cartwright, kernel-team

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.

Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zilstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Tom Zanussi <tom.zanussi@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Thomas Glexiner <tglx@linutronix.de>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Todd Kjos <tkjos@google.com>
Cc: Erick Reyes <erickreyes@google.com>
Cc: Julia Cartwright <julia@ni.com>
Cc: kernel-team@android.com
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
---
 tools/testing/selftests/ftrace/config         |  3 +
 .../test.d/preemptirq/irqsoff_tracer.tc       | 74 +++++++++++++++++++
 2 files changed, 77 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..b76d781c5645
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/preemptirq/irqsoff_tracer.tc
@@ -0,0 +1,74 @@
+#!/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 "preemptoff" available_tracers || unsup "preemptoff tracer not enabled"
+grep "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 test_atomic_sections atomic_mode=preempt atomic_time=500000 || fail
+rmmod test_atomic_sections || fail
+modprobe test_atomic_sections atomic_mode=preempt atomic_time=500000 || fail
+rmmod test_atomic_sections || fail
+modprobe test_atomic_sections atomic_mode=preempt atomic_time=500000 || fail
+rmmod test_atomic_sections || fail
+
+cat trace
+
+# Confirm which tracer
+grep "tracer: preemptoff" trace || fail
+
+# Check the end of the section
+egrep "5.....us : <stack trace>" trace || fail
+
+# Check for 500ms of latency
+egrep "latency: 5..... us" trace || fail
+
+reset_tracer
+
+# Simulate irqsoff section for half a second couple of times
+echo irqsoff > current_tracer
+sleep 1
+modprobe test_atomic_sections atomic_mode=irq atomic_time=500000 || fail
+rmmod test_atomic_sections || fail
+modprobe test_atomic_sections atomic_mode=irq atomic_time=500000 || fail
+rmmod test_atomic_sections || fail
+modprobe test_atomic_sections atomic_mode=irq atomic_time=500000 || fail
+rmmod test_atomic_sections || fail
+
+cat trace
+
+# Confirm which tracer
+grep "tracer: irqsoff" trace || fail
+
+# Check the end of the section
+egrep "5.....us : <stack trace>" trace || fail
+
+# Check for 500ms of latency
+egrep "latency: 5..... us" trace || fail
+
+reset_tracer
+exit 0
+
-- 
2.17.0.441.gb46fe60e1d-goog

^ permalink raw reply related	[flat|nested] 4+ messages in thread
end of thread, other threads:[~2018-05-18 17:00 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
     [not found] <20180518015421.129868-1-joel@joelfernandes.org>
2018-05-18  1:54 ` [PATCH 2/2] kselftests: ftrace: Add tests for the preemptoff and irqsoff tracers Joel Fernandes (Google)
2018-05-18 15:32   ` Masami Hiramatsu
2018-05-18 17:00     ` Joel Fernandes
2018-05-18  1:59 [PATCH RFC 0/2] Tests for " Joel Fernandes
2018-05-18  1:59 ` [PATCH 2/2] kselftests: ftrace: Add tests for the " Joel Fernandes

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