package org.multiverse.stms.gamma.integration.isolation;
import org.junit.Before;
import org.junit.Test;
import org.multiverse.TestThread;
import org.multiverse.api.Txn;
import org.multiverse.api.TxnExecutor;
import org.multiverse.api.LockMode;
import org.multiverse.api.callables.TxnVoidCallable;
import org.multiverse.stms.gamma.GammaConstants;
import org.multiverse.stms.gamma.GammaStm;
import org.multiverse.stms.gamma.transactionalobjects.GammaTxnLong;
import org.multiverse.stms.gamma.transactions.GammaTxn;
import static java.lang.System.currentTimeMillis;
import static org.junit.Assert.assertEquals;
import static org.multiverse.TestUtils.joinAll;
import static org.multiverse.TestUtils.startAll;
import static org.multiverse.api.GlobalStmInstance.getGlobalStmInstance;
import static org.multiverse.api.TxnThreadLocal.clearThreadLocalTxn;
import static org.multiverse.stms.gamma.BenchmarkUtils.transactionsPerSecondAsString;
import static org.multiverse.stms.gamma.BenchmarkUtils.transactionsPerSecondPerThreadAsString;
/**
* A StressTest that checks if the system is able to deal with concurrent increments on a TxnLong
* So there is a lot of contention.
*
* @author Peter Veentjer
*/
public abstract class Isolation_AbstractTest implements GammaConstants {
public long transactionsPerThread = 50 * 1000 * 1000;
public final int threadCount = 2;
protected GammaStm stm;
@Before
public void setUp() {
clearThreadLocalTxn();
stm = (GammaStm) getGlobalStmInstance();
}
protected abstract TxnExecutor newBlock(LockMode lockMode, boolean dirtyCheckEnabled);
@Test
public void withNoLockingDirtyCheck() {
test(LockMode.None, true);
}
@Test
public void withNoLockAndNoDirtyCheck() {
test(LockMode.None, false);
}
@Test
public void withReadLockAndDirtyCheck() {
test(LockMode.Read, true);
}
@Test
public void withReadLockAndNoDirtyCheck() {
test(LockMode.Read, false);
}
@Test
public void withWriteLockingAndDirtyCheck() {
test(LockMode.Write, true);
}
@Test
public void withWriteLockAndNoDirtyCheck() {
test(LockMode.Write, false);
}
@Test
public void withExclusiveLockAndDirtyCheck() {
test(LockMode.Exclusive, true);
}
@Test
public void withExclusiveLockNoDirtyCheck() {
test(LockMode.Exclusive, false);
}
@Test
public void withMixedSettings() {
transactionsPerThread = 10000000;
GammaTxnLong ref = new GammaTxnLong(stm);
UpdateThread[] threads = new UpdateThread[8];
threads[0] = new UpdateThread(0, ref, LockMode.None, true);
threads[1] = new UpdateThread(1, ref, LockMode.None, false);
threads[2] = new UpdateThread(0, ref, LockMode.Read, true);
threads[3] = new UpdateThread(1, ref, LockMode.Read, false);
threads[4] = new UpdateThread(2, ref, LockMode.Write, true);
threads[5] = new UpdateThread(3, ref, LockMode.Write, false);
threads[6] = new UpdateThread(4, ref, LockMode.Exclusive, true);
threads[7] = new UpdateThread(5, ref, LockMode.Exclusive, false);
startAll(threads);
joinAll(threads);
long totalDurationMs = 0;
for (UpdateThread thread : threads) {
totalDurationMs += thread.durationMs;
}
System.out.println("--------------------------------------------------------");
System.out.printf("Threadcount: %s\n", threads.length);
System.out.printf("Performance: %s transactions/second/thread\n",
transactionsPerSecondPerThreadAsString(transactionsPerThread, totalDurationMs, threads.length));
System.out.printf("Performance: %s transactions/second\n",
transactionsPerSecondAsString(transactionsPerThread, totalDurationMs, threads.length));
assertEquals(threads.length * transactionsPerThread, ref.atomicGet());
System.out.println("ref.orec: " + ref.___toOrecString());
}
public void test(LockMode lockMode, boolean dirtyCheckEnabled) {
UpdateThread[] threads = new UpdateThread[threadCount];
GammaTxnLong ref = new GammaTxnLong(stm);
for (int k = 0; k < threads.length; k++) {
threads[k] = new UpdateThread(k, ref, lockMode, dirtyCheckEnabled);
}
startAll(threads);
joinAll(threads);
long totalDurationMs = 0;
for (UpdateThread thread : threads) {
totalDurationMs += thread.durationMs;
}
System.out.println("--------------------------------------------------------");
System.out.printf("Threadcount: %s\n", threadCount);
System.out.printf("Performance: %s transactions/second/thread\n",
transactionsPerSecondPerThreadAsString(transactionsPerThread, totalDurationMs, threadCount));
System.out.printf("Performance: %s transactions/second\n",
transactionsPerSecondAsString(transactionsPerThread, totalDurationMs, threadCount));
System.out.println("ref.orec: " + ref.___toOrecString());
assertEquals(threadCount * transactionsPerThread, ref.atomicGet());
}
class UpdateThread extends TestThread {
private final boolean dirtyCheckEnabled;
private final GammaTxnLong ref;
private final LockMode lockMode;
private long durationMs;
public UpdateThread(int id, GammaTxnLong ref, LockMode lockMode, boolean dirtyCheckEnabled) {
super("UpdateThread-" + id);
this.ref = ref;
this.lockMode = lockMode;
this.dirtyCheckEnabled = dirtyCheckEnabled;
}
@Override
public void doRun() {
TxnExecutor executor = newBlock(lockMode, dirtyCheckEnabled);
TxnVoidCallable callable = new TxnVoidCallable() {
@Override
public void call(Txn tx) throws Exception {
GammaTxn btx = (GammaTxn) tx;
btx.richmansMansConflictScan = false;
ref.openForWrite(btx, LOCKMODE_NONE).long_value++;
}
};
long startMs = currentTimeMillis();
for (long k = 0; k < transactionsPerThread; k++) {
executor.execute(callable);
if (k % 500000 == 0) {
System.out.printf("%s is at %s\n", getName(), k);
}
}
durationMs = currentTimeMillis() - startMs;
System.out.printf("finished %s after %s ms\n", getName(), durationMs);
}
}
}