From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: linux-kernel@vger.kernel.org
Cc: mingo@kernel.org, jiangshanlai@gmail.com, dipankar@in.ibm.com,
akpm@linux-foundation.org, mathieu.desnoyers@efficios.com,
josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org,
rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com,
dvhart@linux.intel.com, fweisbec@gmail.com, oleg@redhat.com,
bobby.prani@gmail.com,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Subject: [PATCH tip/core/rcu 24/24] rcutorture: Add boot-time adjustment of leaf fanout
Date: Tue, 12 Apr 2016 08:43:57 -0700 [thread overview]
Message-ID: <1460475837-26498-24-git-send-email-paulmck@linux.vnet.ibm.com> (raw)
In-Reply-To: <20160412154332.GA24983@linux.vnet.ibm.com>
Currently, the rcutorture scripts do not test boot-time adjustment of
leaf fanout (via the rcutree.rcu_fanout_leaf boot parameter), as was noted
during testing carried out by Iftekhar Ahmed of Oregon State University.
This commit therefore adjusts TREE04's CONFIG_RCU_FANOUT_LEAF from 4 to 3,
and also adds rcutree.rcu_fanout_leaf=4 to its boot parameters. This
change forces RCU's boot-time geometry-change code to be exercised.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---
tools/testing/selftests/rcutorture/configs/rcu/TREE04 | 2 +-
tools/testing/selftests/rcutorture/configs/rcu/TREE04.boot | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE04 b/tools/testing/selftests/rcutorture/configs/rcu/TREE04
index 39a2c6d7d7ec..17cbe098b115 100644
--- a/tools/testing/selftests/rcutorture/configs/rcu/TREE04
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE04
@@ -14,7 +14,7 @@ CONFIG_HOTPLUG_CPU=n
CONFIG_SUSPEND=n
CONFIG_HIBERNATION=n
CONFIG_RCU_FANOUT=4
-CONFIG_RCU_FANOUT_LEAF=4
+CONFIG_RCU_FANOUT_LEAF=3
CONFIG_RCU_NOCB_CPU=n
CONFIG_DEBUG_LOCK_ALLOC=n
CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE04.boot b/tools/testing/selftests/rcutorture/configs/rcu/TREE04.boot
index 0fc8a3428938..e34c33430447 100644
--- a/tools/testing/selftests/rcutorture/configs/rcu/TREE04.boot
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE04.boot
@@ -1 +1 @@
-rcutorture.torture_type=rcu_bh
+rcutorture.torture_type=rcu_bh rcutree.rcu_fanout_leaf=4
--
2.5.2
prev parent reply other threads:[~2016-04-12 15:44 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-12 15:43 [PATCH tip/core/rcu 0/24] Torture-test changes for 4.7 Paul E. McKenney
2016-04-12 15:43 ` [PATCH tip/core/rcu 01/24] rcutorture: Update scripting to accommodate rcuperf Paul E. McKenney
2016-04-12 15:43 ` [PATCH tip/core/rcu 02/24] rcutorture: Allow for rcupdate.rcu_normal Paul E. McKenney
2016-04-12 15:43 ` [PATCH tip/core/rcu 03/24] rcutorture: Expedited-GP batch progress access to torturing Paul E. McKenney
2016-04-12 15:43 ` [PATCH tip/core/rcu 04/24] rcutorture: Add RCU grace-period performance tests Paul E. McKenney
2016-04-12 15:43 ` [PATCH tip/core/rcu 05/24] rcutorture: Documentation for rcuperf kernel parameters Paul E. McKenney
2016-04-12 15:43 ` [PATCH tip/core/rcu 06/24] rcutorture: Bind rcuperf reader/writer kthreads to CPUs Paul E. McKenney
2016-04-12 15:43 ` [PATCH tip/core/rcu 07/24] rcutorture: Set rcuperf writer kthreads to real-time priority Paul E. McKenney
2016-04-12 15:43 ` [PATCH tip/core/rcu 08/24] rcutorture: Print measure of batching efficiency Paul E. McKenney
2016-04-12 15:43 ` [PATCH tip/core/rcu 09/24] rcutorture: Make rcuperf collect expedited event-trace data Paul E. McKenney
2016-04-12 15:43 ` [PATCH tip/core/rcu 10/24] rcutorture: Make scripts analyze rcuperf trace data, if present Paul E. McKenney
2016-04-12 15:43 ` [PATCH tip/core/rcu 11/24] rcutorture: Add rcuperf holdoff boot parameter to reduce interference Paul E. McKenney
2016-04-12 15:43 ` [PATCH tip/core/rcu 12/24] rcutorture: Avoid RCU CPU stall warning and RT throttling Paul E. McKenney
2016-04-12 15:43 ` [PATCH tip/core/rcu 13/24] rcutorture: Add largish-system rcuperf scenario Paul E. McKenney
2016-04-12 15:43 ` [PATCH tip/core/rcu 14/24] rcuperf: Do not wake up shutdown wait queue if "shutdown" is false Paul E. McKenney
2016-04-12 15:43 ` [PATCH tip/core/rcu 15/24] rcutorture: Remove redundant initialization to zero Paul E. McKenney
2016-04-12 15:43 ` [PATCH tip/core/rcu 16/24] rcutorture: Consider FROZEN hotplug notifier transitions Paul E. McKenney
2016-04-12 15:43 ` [PATCH tip/core/rcu 17/24] torture: Clarify refusal to run more than one torture test Paul E. McKenney
2016-04-12 15:43 ` [PATCH tip/core/rcu 18/24] torture: Kill qemu, not parent process Paul E. McKenney
2016-04-12 15:43 ` [PATCH tip/core/rcu 19/24] rcutorture: Convert test duration to seconds early Paul E. McKenney
2016-04-12 15:43 ` [PATCH tip/core/rcu 20/24] rcutorture: Add OS-jitter capability Paul E. McKenney
2016-04-12 15:43 ` [PATCH tip/core/rcu 21/24] rcutorture: Don't rebuild identical kernel Paul E. McKenney
2016-04-12 15:43 ` [PATCH tip/core/rcu 22/24] rcutorture: Dump trace buffer upon shutdown Paul E. McKenney
2016-04-12 15:43 ` [PATCH tip/core/rcu 23/24] rcutorture: Add irqs-disabled test for call_rcu() Paul E. McKenney
2016-04-12 15:43 ` Paul E. McKenney [this message]
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