linux-kernel - [PATCH tip/core/rcu 0/24] Torture-test changes for 4.7

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Date:	Tue, 12 Apr 2016 08:43:32 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	mingo@...nel.org, jiangshanlai@...il.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
	josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
	rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
	dvhart@...ux.intel.com, fweisbec@...il.com, oleg@...hat.com,
	bobby.prani@...il.com
Subject: [PATCH tip/core/rcu 0/24] Torture-test changes for 4.7

Hello!

This series contains torture-test changes for RCU, most notably a new
test for performance of RCU grace periods named "rcuperf":

1.	Update scripting to accommodate rcuperf.

2.	Allow for rcupdate.rcu_normal in rcu_torture_writer() decisions.

3.	Expedited-GP batch progress access to torturing for progress
	statistics.

4.	Add RCU grace-period performance tests, AKA "rcuperf".

5.	Documentation for rcuperf kernel parameters.

6.	Bind rcuperf reader/writer kthreads to CPUs.

7.	Set rcuperf writer kthreads to real-time priority.

8.	Print measure of batching efficiency.

9.	Make rcuperf collect expedited event-trace data.

10.	Make scripts analyze rcuperf trace data, if present.

11.	Add rcuperf holdoff boot parameter to reduce interference.

12.	Avoid RCU CPU stall warning and RT throttling.

13.	Add largish-system rcuperf scenario.

14.	Do not wake up shutdown wait queue if "shutdown" is false, courtesy
	of Artem Savkov.

15.	Remove redundant initialization to zero.

16.	Consider FROZEN hotplug notifier transitions, courtesy of
	Anna-Maria Gleixner.

17.	Clarify refusal to run more than one torture test.

18.	Kill qemu, not parent process.

19.	Convert test duration to seconds early.

20.	Add OS-jitter capability.

21.	Don't rebuild identical kernel.

22.	Dump trace buffer upon shutdown.

23.	Add irqs-disabled test for call_rcu().

24.	Add boot-time adjustment of leaf fanout.

								Thanx, Paul

------------------------------------------------------------------------

 Documentation/kernel-parameters.txt                                  |   38 
 include/linux/rcutiny.h                                              |   16 
 include/linux/rcutree.h                                              |    2 
 kernel/rcu/Makefile                                                  |    1 
 kernel/rcu/rcuperf.c                                                 |  661 +++++++++-
 kernel/rcu/rcutorture.c                                              |   12 
 kernel/rcu/tree.c                                                    |   22 
 kernel/torture.c                                                     |    4 
 lib/Kconfig.debug                                                    |   33 
 tools/testing/selftests/rcutorture/bin/jitter.sh                     |   83 +
 tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf-ftrace.sh |  121 +
 tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf.sh        |  116 +
 tools/testing/selftests/rcutorture/bin/kvm-recheck.sh                |    5 
 tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh             |   61 
 tools/testing/selftests/rcutorture/bin/kvm.sh                        |   24 
 tools/testing/selftests/rcutorture/configs/rcu/TREE04                |    2 
 tools/testing/selftests/rcutorture/configs/rcu/TREE04.boot           |    2 
 tools/testing/selftests/rcutorture/configs/rcuperf/CFLIST            |    1 
 tools/testing/selftests/rcutorture/configs/rcuperf/CFcommon          |    2 
 tools/testing/selftests/rcutorture/configs/rcuperf/TREE              |   20 
 tools/testing/selftests/rcutorture/configs/rcuperf/TREE54            |   23 
 tools/testing/selftests/rcutorture/configs/rcuperf/ver_functions.sh  |   52 
 22 files changed, 1260 insertions(+), 41 deletions(-)