package org.multiverse.stms.gamma.integration.isolation;
import org.junit.Before;
import org.junit.Test;
import org.multiverse.TestThread;
import org.multiverse.stms.gamma.GammaStm;
import org.multiverse.stms.gamma.transactionalobjects.GammaTxnLong;
import static java.lang.System.currentTimeMillis;
import static org.junit.Assert.assertEquals;
import static org.multiverse.TestUtils.joinAll;
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;
public class AtomicIncrementIsolationStressTest {
private GammaStm stm;
@Before
public void setUp() {
stm = (GammaStm) getGlobalStmInstance();
clearThreadLocalTxn();
}
@Test
public void test() {
int threadCount = 2;
UpdateThread[] threads = new UpdateThread[threadCount];
GammaTxnLong ref = new GammaTxnLong(stm, 0);
long transactionsPerThread = 200 * 1000 * 1000;
for (int k = 0; k < threads.length; k++) {
threads[k] = new UpdateThread(k, ref, transactionsPerThread);
}
for (UpdateThread thread : threads) {
thread.start();
}
joinAll(10 * 60, 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));
assertEquals(threadCount * transactionsPerThread, ref.atomicGet());
System.out.println("ref.orec: " + ref.___toOrecString());
}
class UpdateThread extends TestThread {
private final GammaTxnLong ref;
private final long count;
private long durationMs;
public UpdateThread(int id, GammaTxnLong ref, long count) {
super("UpdateThread-" + id);
this.ref = ref;
this.count = count;
}
@Override
public void doRun() {
long startMs = currentTimeMillis();
for (long k = 0; k < count; k++) {
ref.atomicIncrementAndGet(1);
if (k % 10000000 == 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);
}
}
}