package org.directmemory.preliminary.test;
import java.nio.ByteBuffer;
import java.util.Map;
import java.util.concurrent.ConcurrentMap;
import org.directmemory.measures.Ram;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.MethodRule;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.carrotsearch.junitbenchmarks.BenchmarkOptions;
import com.carrotsearch.junitbenchmarks.BenchmarkRule;
import com.carrotsearch.junitbenchmarks.annotation.AxisRange;
import com.carrotsearch.junitbenchmarks.annotation.BenchmarkHistoryChart;
import com.carrotsearch.junitbenchmarks.annotation.BenchmarkMethodChart;
import com.carrotsearch.junitbenchmarks.annotation.LabelType;
import com.google.common.collect.MapMaker;
import com.google.common.collect.Maps;
@AxisRange(min = 0, max = 1)
@BenchmarkMethodChart(filePrefix = "latest-microbench")
@BenchmarkOptions(benchmarkRounds = 1, warmupRounds = 0)
@BenchmarkHistoryChart(labelWith = LabelType.CUSTOM_KEY, maxRuns = 5)
public class MicroBenchmarks {
@Rule
public MethodRule benchmarkRun = new BenchmarkRule();
private static Logger logger = LoggerFactory.getLogger(MicroBenchmarks.class);
private int many = 3000000;
private int less = 300000;
@Before
public void cleanup() {
dump("Before cleanup");
//Runtime.getRuntime().gc();
//dump("After cleanup");
logger.info("************************************************");
}
private void dump(String message) {
logger.info(message);
logger.info("Memory - max: " + Ram.inMb(Runtime.getRuntime().maxMemory()));
logger.info("Memory - allocated: " + Ram.inMb(Runtime.getRuntime().totalMemory()));
logger.info("Memory - free : " + Ram.inMb(Runtime.getRuntime().freeMemory()));
}
@Test
public void manySmallInHeapWithHashmap() {
final Map<String, byte[]> test = Maps.newHashMap();
final byte payload[] = new byte[450];
long ops = many;
for (int i = 0; i < ops; i++) {
final String key = "test-"+i;
test.put(key, payload.clone());
}
logger.info("many=" + ops);
logger.info("payload.length=" + payload.length);
logger.info("stored " + Ram.inMb(payload.length * ops));
}
@Test
public void manySmallInHeapWithMapMaker() {
final byte payload[] = new byte[450];
int ops = many;
logger.info("many=" + ops);
logger.info("payload.length=" + payload.length);
pumpTheHeap(ops, payload);
}
@Test
public void manySmallOffHeap() {
final byte payload[] = new byte[450];
int ops = many;
logger.info("many=" + ops);
logger.info("payload.length=" + payload.length);
pumpOffHeap(ops, payload);
}
@Test
public void lessButLargerOffHeap() {
final byte payload[] = new byte[5120];
int ops = less;
logger.info("less=" + ops);
logger.info("payload.length=" + payload.length);
pumpOffHeap(ops, payload);
}
@Test
public void lessButLargerInHeap() {
final byte payload[] = new byte[5120];
int ops = less;
logger.info("less=" + ops);
logger.info("payload.length=" + payload.length);
pumpTheHeap(ops, payload);
}
/*
*
*
* ExecutorService executor = Executors.newCachedThreadPool();
Callable<Object> task = new Callable<Object>() {
public Object call() {
return something.blockingMethod();
}
}
Future<Object> future = executor.submit(task);
try {
Object result = future.get(5, TimeUnit.SECONDS);
} catch (TimeoutException ex) {
// handle the timeout
} finally {
future.cancel(); // may or may not desire this
}
*/
private void pumpOffHeap(int ops, byte[] payload) {
ConcurrentMap<String, ByteBuffer> test = new MapMaker()
.concurrencyLevel(4)
.makeMap();
logger.info(Ram.inMb(ops*payload.length) + " in " + ops + " slices to store");
ByteBuffer bulk = ByteBuffer.allocateDirect(ops * payload.length);
double started = System.currentTimeMillis();
for (int i = 0; i < ops; i++) {
bulk.position(i*payload.length);
final ByteBuffer buf = bulk.duplicate();
buf.put(payload);
test.put("test-"+i, buf);
}
double finished = System.currentTimeMillis();
logger.info("done in " + (finished-started)/1000 + " seconds");
for (ByteBuffer buf : test.values()) {
buf.clear();
}
}
private void pumpTheHeap(int ops, byte[] payload) {
ConcurrentMap<String, byte[]> test = new MapMaker()
.concurrencyLevel(4)
.makeMap();
logger.info(Ram.inMb(ops*payload.length) + " in " + ops + " slices to store");
double started = System.currentTimeMillis();
for (int i = 0; i < ops; i++) {
test.put("test-"+i, payload.clone());
}
double finished = System.currentTimeMillis();
logger.info("done in " + (finished-started)/1000 + " seconds");
}
}