From: "Paul E. McKenney" <paulmck@kernel.org>
To: rcu@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, kernel-team@fb.com,
rostedt@goodmis.org, "Paul E. McKenney" <paulmck@kernel.org>
Subject: [PATCH rcu 07/12] rcutorture: Allow specifying per-scenario stat_interval
Date: Mon, 18 Apr 2022 17:12:28 -0700 [thread overview]
Message-ID: <20220419001233.3950188-7-paulmck@kernel.org> (raw)
In-Reply-To: <20220419001123.GA3949851@paulmck-ThinkPad-P17-Gen-1>
The rcutorture test suite makes double use of the rcutorture.stat_interval
module parameter. As its name suggests, it controls the frequency
of statistics printing, but it also controls the rcu_torture_writer()
stall timeout. The current setting of 15 seconds works surprisingly well.
However, given that the RCU tasks stall-warning timeout is ten -minutes-,
15 seconds is too short for TASKS02, which runs a non-preemptible kernel
on a single CPU.
This commit therefore adds checks for per-scenario specification of the
rcutorture.stat_interval module parameter.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
.../rcutorture/configs/rcu/TASKS02.boot | 1 +
.../rcutorture/configs/rcu/ver_functions.sh | 16 ++++++++++++++--
2 files changed, 15 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TASKS02.boot b/tools/testing/selftests/rcutorture/configs/rcu/TASKS02.boot
index cd2a188eeb6d..b9b6d67cbc5f 100644
--- a/tools/testing/selftests/rcutorture/configs/rcu/TASKS02.boot
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TASKS02.boot
@@ -1 +1,2 @@
rcutorture.torture_type=tasks
+rcutorture.stat_interval=60
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/ver_functions.sh b/tools/testing/selftests/rcutorture/configs/rcu/ver_functions.sh
index effa415f9b92..e2bc99c785e7 100644
--- a/tools/testing/selftests/rcutorture/configs/rcu/ver_functions.sh
+++ b/tools/testing/selftests/rcutorture/configs/rcu/ver_functions.sh
@@ -9,7 +9,7 @@
# rcutorture_param_n_barrier_cbs bootparam-string
#
-# Adds n_barrier_cbs rcutorture module parameter to kernels having it.
+# Adds n_barrier_cbs rcutorture module parameter if not already specified.
rcutorture_param_n_barrier_cbs () {
if echo $1 | grep -q "rcutorture\.n_barrier_cbs"
then
@@ -30,13 +30,25 @@ rcutorture_param_onoff () {
fi
}
+# rcutorture_param_stat_interval bootparam-string
+#
+# Adds stat_interval rcutorture module parameter if not already specified.
+rcutorture_param_stat_interval () {
+ if echo $1 | grep -q "rcutorture\.stat_interval"
+ then
+ :
+ else
+ echo rcutorture.stat_interval=15
+ fi
+}
+
# per_version_boot_params bootparam-string config-file seconds
#
# Adds per-version torture-module parameters to kernels supporting them.
per_version_boot_params () {
echo $1 `rcutorture_param_onoff "$1" "$2"` \
`rcutorture_param_n_barrier_cbs "$1"` \
- rcutorture.stat_interval=15 \
+ `rcutorture_param_stat_interval "$1"` \
rcutorture.shutdown_secs=$3 \
rcutorture.test_no_idle_hz=1 \
rcutorture.verbose=1
--
2.31.1.189.g2e36527f23
next prev parent reply other threads:[~2022-04-19 0:13 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-19 0:11 [PATCH rcu 0/12] RCU-tasks torture-test updates Paul E. McKenney
2022-04-19 0:12 ` [PATCH rcu 01/12] rcu: Make TASKS_RUDE_RCU select IRQ_WORK Paul E. McKenney
2022-04-19 0:12 ` [PATCH rcu 02/12] rcu: Make the TASKS_RCU Kconfig option be selected Paul E. McKenney
2022-04-19 14:13 ` Masami Hiramatsu
2022-04-19 14:25 ` Paul E. McKenney
2022-04-19 0:12 ` [PATCH rcu 03/12] rcutorture: Allow rcutorture without RCU Tasks Trace Paul E. McKenney
2022-04-19 0:12 ` [PATCH rcu 04/12] rcutorture: Allow rcutorture without RCU Tasks Paul E. McKenney
2022-04-19 0:12 ` [PATCH rcu 05/12] rcutorture: Allow rcutorture without RCU Tasks Rude Paul E. McKenney
2022-04-19 0:12 ` [PATCH rcu 06/12] rcutorture: Add CONFIG_PREEMPT_DYNAMIC=n to TASKS02 scenario Paul E. McKenney
2022-04-19 0:12 ` Paul E. McKenney [this message]
2022-04-19 0:12 ` [PATCH rcu 08/12] refscale: Allow refscale without RCU Tasks Paul E. McKenney
2022-04-19 0:12 ` [PATCH rcu 09/12] refscale: Allow refscale without RCU Tasks Rude/Trace Paul E. McKenney
2022-04-19 0:12 ` [PATCH rcu 10/12] rcuscale: Allow rcuscale without RCU Tasks Paul E. McKenney
2022-04-19 0:12 ` [PATCH rcu 11/12] rcuscale: Allow rcuscale without RCU Tasks Rude/Trace Paul E. McKenney
2022-04-19 0:12 ` [PATCH rcu 12/12] scftorture: Adjust for TASKS_RCU Kconfig option being selected Paul E. McKenney
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