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// threadedtests.cpp - Tests for threaded code
//
/**
* Copyright (C) 2008 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "pch.h"
#include "../bson/util/atomic_int.h"
#include "../util/concurrency/mvar.h"
#include "../util/concurrency/thread_pool.h"
#include "../util/timer.h"
#include <boost/thread.hpp>
#include <boost/bind.hpp>
#include "dbtests.h"
namespace ThreadedTests {
template <int nthreads_param=10>
class ThreadedTest {
public:
virtual void setup() {} //optional
virtual void subthread() = 0;
virtual void validate() = 0;
static const int nthreads = nthreads_param;
void run() {
setup();
launch_subthreads(nthreads);
validate();
}
virtual ~ThreadedTest() {}; // not necessary, but makes compilers happy
private:
void launch_subthreads(int remaining) {
if (!remaining) return;
boost::thread athread(boost::bind(&ThreadedTest::subthread, this));
launch_subthreads(remaining - 1);
athread.join();
}
};
class MongoMutexTest : public ThreadedTest<135> {
#if defined(_DEBUG)
enum { N = 5000 };
#else
enum { N = 40000 };
#endif
MongoMutex *mm;
public:
void run() {
Timer t;
cout << "MongoMutexTest N:" << N << endl;
ThreadedTest<135>::run();
cout << "MongoMutexTest " << t.millis() << "ms" << endl;
}
private:
virtual void setup() {
mm = new MongoMutex("MongoMutexTest");
}
virtual void subthread() {
Client::initThread("mongomutextest");
sleepmillis(0);
for( int i = 0; i < N; i++ ) {
if( i % 7 == 0 ) {
mm->lock_shared();
mm->lock_shared();
mm->unlock_shared();
mm->unlock_shared();
}
else if( i % 7 == 1 ) {
mm->lock_shared();
ASSERT( mm->atLeastReadLocked() );
mm->unlock_shared();
}
else if( i % 7 == 2 ) {
mm->lock();
ASSERT( mm->isWriteLocked() );
mm->unlock();
}
else if( i % 7 == 3 ) {
mm->lock();
mm->lock_shared();
ASSERT( mm->isWriteLocked() );
mm->unlock_shared();
mm->unlock();
}
else if( i % 7 == 4 ) {
mm->lock();
mm->releaseEarly();
mm->unlock();
}
else if( i % 7 == 5 ) {
if( mm->lock_try(1) ) {
mm->unlock();
}
}
else if( i % 7 == 6 ) {
if( mm->lock_shared_try(0) ) {
mm->unlock_shared();
}
}
else {
mm->lock_shared();
mm->unlock_shared();
}
}
cc().shutdown();
}
virtual void validate() {
ASSERT( !mm->atLeastReadLocked() );
mm->lock();
mm->unlock();
mm->lock_shared();
mm->unlock_shared();
}
};
// Tested with up to 30k threads
class IsAtomicUIntAtomic : public ThreadedTest<> {
static const int iterations = 1000000;
AtomicUInt target;
void subthread() {
for(int i=0; i < iterations; i++) {
//target.x++; // verified to fail with this version
target++;
}
}
void validate() {
ASSERT_EQUALS(target.x , unsigned(nthreads * iterations));
AtomicUInt u;
ASSERT_EQUALS(0u, u);
ASSERT_EQUALS(0u, u++);
ASSERT_EQUALS(2u, ++u);
ASSERT_EQUALS(2u, u--);
ASSERT_EQUALS(0u, --u);
ASSERT_EQUALS(0u, u);
u++;
ASSERT( u > 0 );
u--;
ASSERT( ! ( u > 0 ) );
}
};
class MVarTest : public ThreadedTest<> {
static const int iterations = 10000;
MVar<int> target;
public:
MVarTest() : target(0) {}
void subthread() {
for(int i=0; i < iterations; i++) {
int val = target.take();
#if BOOST_VERSION >= 103500
//increase chances of catching failure
boost::this_thread::yield();
#endif
target.put(val+1);
}
}
void validate() {
ASSERT_EQUALS(target.take() , nthreads * iterations);
}
};
class ThreadPoolTest {
static const int iterations = 10000;
static const int nThreads = 8;
AtomicUInt counter;
void increment(int n) {
for (int i=0; i<n; i++) {
counter++;
}
}
public:
void run() {
ThreadPool tp(nThreads);
for (int i=0; i < iterations; i++) {
tp.schedule(&ThreadPoolTest::increment, this, 2);
}
tp.join();
ASSERT(counter == (unsigned)(iterations * 2));
}
};
class LockTest {
public:
void run() {
// quick atomicint wrap test
// MSGID likely assumes this semantic
AtomicUInt counter = 0xffffffff;
counter++;
ASSERT( counter == 0 );
writelocktry lk( "" , 0 );
ASSERT( lk.got() );
}
};
class All : public Suite {
public:
All() : Suite( "threading" ) {
}
void setupTests() {
add< IsAtomicUIntAtomic >();
add< MVarTest >();
add< ThreadPoolTest >();
add< LockTest >();
add< MongoMutexTest >();
}
} myall;
}
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