[Qemu-devel] [PULL 02/11] rcu: add rcutorture
rcutorture is the unit test for rcu. Reviewed-by: Fam Zheng f...@redhat.com Signed-off-by: Paolo Bonzini pbonz...@redhat.com --- tests/Makefile | 7 +- tests/rcutorture.c | 448 + 2 files changed, 454 insertions(+), 1 deletion(-) create mode 100644 tests/rcutorture.c diff --git a/tests/Makefile b/tests/Makefile index c2e2e52..db5b3c3 100644 --- a/tests/Makefile +++ b/tests/Makefile @@ -60,6 +60,8 @@ gcov-files-test-mul64-y = util/host-utils.c check-unit-y += tests/test-int128$(EXESUF) # all code tested by test-int128 is inside int128.h gcov-files-test-int128-y = +check-unit-y += tests/rcutorture$(EXESUF) +gcov-files-rcutorture-y = util/rcu.c check-unit-y += tests/test-bitops$(EXESUF) check-unit-$(CONFIG_HAS_GLIB_SUBPROCESS_TESTS) += tests/test-qdev-global-props$(EXESUF) check-unit-y += tests/check-qom-interface$(EXESUF) @@ -223,7 +225,8 @@ test-obj-y = tests/check-qint.o tests/check-qstring.o tests/check-qdict.o \ tests/test-qmp-input-visitor.o tests/test-qmp-input-strict.o \ tests/test-qmp-commands.o tests/test-visitor-serialization.o \ tests/test-x86-cpuid.o tests/test-mul64.o tests/test-int128.o \ - tests/test-opts-visitor.o tests/test-qmp-event.o + tests/test-opts-visitor.o tests/test-qmp-event.o \ + tests/rcutorture.o test-qapi-obj-y = tests/test-qapi-visit.o tests/test-qapi-types.o \ tests/test-qapi-event.o @@ -252,6 +255,8 @@ tests/test-x86-cpuid$(EXESUF): tests/test-x86-cpuid.o tests/test-xbzrle$(EXESUF): tests/test-xbzrle.o migration/xbzrle.o page_cache.o libqemuutil.a tests/test-cutils$(EXESUF): tests/test-cutils.o util/cutils.o tests/test-int128$(EXESUF): tests/test-int128.o +tests/rcutorture$(EXESUF): tests/rcutorture.o libqemuutil.a + tests/test-qdev-global-props$(EXESUF): tests/test-qdev-global-props.o \ hw/core/qdev.o hw/core/qdev-properties.o hw/core/hotplug.o\ hw/core/irq.o \ diff --git a/tests/rcutorture.c b/tests/rcutorture.c new file mode 100644 index 000..e370843 --- /dev/null +++ b/tests/rcutorture.c @@ -0,0 +1,448 @@ +/* + * rcutorture.c: simple user-level performance/stress test of RCU. + * + * Usage: + * ./rcu nreaders rperf [ seconds ] + * Run a read-side performance test with the specified + * number of readers for seconds seconds. + * ./rcu nupdaters uperf [ seconds ] + * Run an update-side performance test with the specified + * number of updaters and specified duration. + * ./rcu nreaders perf [ seconds ] + * Run a combined read/update performance test with the specified + * number of readers and one updater and specified duration. + * + * The above tests produce output as follows: + * + * n_reads: 46008000 n_updates: 146026 nreaders: 2 nupdaters: 1 duration: 1 + * ns/read: 43.4707 ns/update: 6848.1 + * + * The first line lists the total number of RCU reads and updates executed + * during the test, the number of reader threads, the number of updater + * threads, and the duration of the test in seconds. The second line + * lists the average duration of each type of operation in nanoseconds, + * or nan if the corresponding type of operation was not performed. + * + * ./rcu nreaders stress [ seconds ] + * Run a stress test with the specified number of readers and + * one updater. + * + * This test produces output as follows: + * + * n_reads: 114633217 n_updates: 3903415 n_mberror: 0 + * rcu_stress_count: 114618391 14826 0 0 0 0 0 0 0 0 0 + * + * The first line lists the number of RCU read and update operations + * executed, followed by the number of memory-ordering violations + * (which will be zero in a correct RCU implementation). The second + * line lists the number of readers observing progressively more stale + * data. A correct RCU implementation will have all but the first two + * numbers non-zero. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * Copyright (c) 2008 Paul E. McKenney, IBM Corporation. + */ + +/* + * Test variables. + */ + +#include glib.h +#include stdlib.h +#include stdio.h +#include string.h +#include qemu/atomic.h +#include qemu/rcu.h +#include qemu/compiler.h +#include qemu/thread.h + +long long n_reads = 0LL; +long n_updates = 0L;
[Qemu-devel] [PULL 02/11] rcu: add rcutorture
rcutorture is the unit test for rcu. Reviewed-by: Fam Zheng f...@redhat.com Signed-off-by: Paolo Bonzini pbonz...@redhat.com --- tests/Makefile | 7 +- tests/rcutorture.c | 448 + 2 files changed, 454 insertions(+), 1 deletion(-) create mode 100644 tests/rcutorture.c diff --git a/tests/Makefile b/tests/Makefile index c2e2e52..db5b3c3 100644 --- a/tests/Makefile +++ b/tests/Makefile @@ -60,6 +60,8 @@ gcov-files-test-mul64-y = util/host-utils.c check-unit-y += tests/test-int128$(EXESUF) # all code tested by test-int128 is inside int128.h gcov-files-test-int128-y = +check-unit-y += tests/rcutorture$(EXESUF) +gcov-files-rcutorture-y = util/rcu.c check-unit-y += tests/test-bitops$(EXESUF) check-unit-$(CONFIG_HAS_GLIB_SUBPROCESS_TESTS) += tests/test-qdev-global-props$(EXESUF) check-unit-y += tests/check-qom-interface$(EXESUF) @@ -223,7 +225,8 @@ test-obj-y = tests/check-qint.o tests/check-qstring.o tests/check-qdict.o \ tests/test-qmp-input-visitor.o tests/test-qmp-input-strict.o \ tests/test-qmp-commands.o tests/test-visitor-serialization.o \ tests/test-x86-cpuid.o tests/test-mul64.o tests/test-int128.o \ - tests/test-opts-visitor.o tests/test-qmp-event.o + tests/test-opts-visitor.o tests/test-qmp-event.o \ + tests/rcutorture.o test-qapi-obj-y = tests/test-qapi-visit.o tests/test-qapi-types.o \ tests/test-qapi-event.o @@ -252,6 +255,8 @@ tests/test-x86-cpuid$(EXESUF): tests/test-x86-cpuid.o tests/test-xbzrle$(EXESUF): tests/test-xbzrle.o migration/xbzrle.o page_cache.o libqemuutil.a tests/test-cutils$(EXESUF): tests/test-cutils.o util/cutils.o tests/test-int128$(EXESUF): tests/test-int128.o +tests/rcutorture$(EXESUF): tests/rcutorture.o libqemuutil.a + tests/test-qdev-global-props$(EXESUF): tests/test-qdev-global-props.o \ hw/core/qdev.o hw/core/qdev-properties.o hw/core/hotplug.o\ hw/core/irq.o \ diff --git a/tests/rcutorture.c b/tests/rcutorture.c new file mode 100644 index 000..e370843 --- /dev/null +++ b/tests/rcutorture.c @@ -0,0 +1,448 @@ +/* + * rcutorture.c: simple user-level performance/stress test of RCU. + * + * Usage: + * ./rcu nreaders rperf [ seconds ] + * Run a read-side performance test with the specified + * number of readers for seconds seconds. + * ./rcu nupdaters uperf [ seconds ] + * Run an update-side performance test with the specified + * number of updaters and specified duration. + * ./rcu nreaders perf [ seconds ] + * Run a combined read/update performance test with the specified + * number of readers and one updater and specified duration. + * + * The above tests produce output as follows: + * + * n_reads: 46008000 n_updates: 146026 nreaders: 2 nupdaters: 1 duration: 1 + * ns/read: 43.4707 ns/update: 6848.1 + * + * The first line lists the total number of RCU reads and updates executed + * during the test, the number of reader threads, the number of updater + * threads, and the duration of the test in seconds. The second line + * lists the average duration of each type of operation in nanoseconds, + * or nan if the corresponding type of operation was not performed. + * + * ./rcu nreaders stress [ seconds ] + * Run a stress test with the specified number of readers and + * one updater. + * + * This test produces output as follows: + * + * n_reads: 114633217 n_updates: 3903415 n_mberror: 0 + * rcu_stress_count: 114618391 14826 0 0 0 0 0 0 0 0 0 + * + * The first line lists the number of RCU read and update operations + * executed, followed by the number of memory-ordering violations + * (which will be zero in a correct RCU implementation). The second + * line lists the number of readers observing progressively more stale + * data. A correct RCU implementation will have all but the first two + * numbers non-zero. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * Copyright (c) 2008 Paul E. McKenney, IBM Corporation. + */ + +/* + * Test variables. + */ + +#include glib.h +#include stdlib.h +#include stdio.h +#include string.h +#include qemu/atomic.h +#include qemu/rcu.h +#include qemu/compiler.h +#include qemu/thread.h + +long long n_reads = 0LL; +long n_updates = 0L;
