author | kbarrett |
Thu, 23 Aug 2018 18:14:53 -0400 | |
changeset 51511 | eb8d5aeabab3 |
child 51690 | b83571bbc147 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#include "precompiled.hpp" |
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#include "runtime/interfaceSupport.inline.hpp" |
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#include "runtime/orderAccess.hpp" |
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#include "runtime/os.hpp" |
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#include "runtime/thread.hpp" |
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#include "utilities/debug.hpp" |
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#include "utilities/globalCounter.inline.hpp" |
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#include "utilities/globalDefinitions.hpp" |
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#include "utilities/ostream.hpp" |
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#include "utilities/singleWriterSynchronizer.hpp" |
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#include "threadHelper.inline.hpp" |
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#include "unittest.hpp" |
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class SingleWriterSynchronizerTestReader : public JavaTestThread { |
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SingleWriterSynchronizer* _synchronizer; |
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volatile uintx* _synchronized_value; |
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volatile int* _continue_running; |
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static const uint reader_iterations = 10; |
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public: |
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SingleWriterSynchronizerTestReader(Semaphore* post, |
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SingleWriterSynchronizer* synchronizer, |
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volatile uintx* synchronized_value, |
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volatile int* continue_running) : |
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JavaTestThread(post), |
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_synchronizer(synchronizer), |
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_synchronized_value(synchronized_value), |
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_continue_running(continue_running) |
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{} |
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virtual void main_run() { |
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uintx iterations = 0; |
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while (OrderAccess::load_acquire(_continue_running) != 0) { |
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++iterations; |
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SingleWriterSynchronizer::CriticalSection cs(_synchronizer); |
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uintx value = OrderAccess::load_acquire(_synchronized_value); |
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for (uint i = 0; i < reader_iterations; ++i) { |
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uintx new_value = OrderAccess::load_acquire(_synchronized_value); |
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// A reader can see either the value it first read after |
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// entering the critical section, or that value + 1. No other |
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// values are possible. |
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if (value != new_value) { |
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ASSERT_EQ((value + 1), new_value); |
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} |
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} |
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} |
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tty->print_cr("reader iterations: " UINTX_FORMAT, iterations); |
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} |
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}; |
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class SingleWriterSynchronizerTestWriter : public JavaTestThread { |
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SingleWriterSynchronizer* _synchronizer; |
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volatile uintx* _synchronized_value; |
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volatile int* _continue_running; |
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public: |
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SingleWriterSynchronizerTestWriter(Semaphore* post, |
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SingleWriterSynchronizer* synchronizer, |
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volatile uintx* synchronized_value, |
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volatile int* continue_running) : |
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JavaTestThread(post), |
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_synchronizer(synchronizer), |
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_synchronized_value(synchronized_value), |
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_continue_running(continue_running) |
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{} |
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virtual void main_run() { |
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while (OrderAccess::load_acquire(_continue_running) != 0) { |
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++*_synchronized_value; |
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_synchronizer->synchronize(); |
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} |
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tty->print_cr("writer iterations: " UINTX_FORMAT, *_synchronized_value); |
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} |
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}; |
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const uint nreaders = 5; |
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const uint milliseconds_to_run = 3000; |
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TEST_VM(TestSingleWriterSynchronizer, stress) { |
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Semaphore post; |
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SingleWriterSynchronizer synchronizer; |
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volatile uintx synchronized_value = 0; |
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volatile int continue_running = 1; |
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JavaTestThread* readers[nreaders] = {}; |
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for (uint i = 0; i < nreaders; ++i) { |
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readers[i] = new SingleWriterSynchronizerTestReader(&post, |
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&synchronizer, |
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&synchronized_value, |
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&continue_running); |
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readers[i]->doit(); |
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} |
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JavaTestThread* writer = |
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new SingleWriterSynchronizerTestWriter(&post, |
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&synchronizer, |
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&synchronized_value, |
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&continue_running); |
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writer->doit(); |
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tty->print_cr("Stressing synchronizer for %u ms", milliseconds_to_run); |
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{ |
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ThreadInVMfromNative invm(JavaThread::current()); |
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os::sleep(Thread::current(), milliseconds_to_run, true); |
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} |
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continue_running = 0; |
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parents:
diff
changeset
|
133 |
for (uint i = 0; i < nreaders + 1; ++i) { |
eb8d5aeabab3
8209850: Allow NamedThreads to use GlobalCounter critical sections
kbarrett
parents:
diff
changeset
|
134 |
post.wait(); |
eb8d5aeabab3
8209850: Allow NamedThreads to use GlobalCounter critical sections
kbarrett
parents:
diff
changeset
|
135 |
} |
eb8d5aeabab3
8209850: Allow NamedThreads to use GlobalCounter critical sections
kbarrett
parents:
diff
changeset
|
136 |
} |