package org.infinispan.profiling;
import java.io.IOException;
import java.text.NumberFormat;
import java.util.Arrays;
import java.util.Random;
import org.infinispan.Cache;
import org.infinispan.commons.CacheException;
import org.infinispan.test.AbstractInfinispanTest;
import org.infinispan.test.TestingUtil;
import org.infinispan.test.fwk.TestCacheManagerFactory;
import org.testng.annotations.Test;
@Test(groups = "profiling", testName = "profiling.MemConsumptionTest")
public class MemConsumptionTest extends AbstractInfinispanTest {
// adjust the next 4 values
int numEntries = 1000000;
int payloadSize = 60; // bytes
int keySize = 10; // bytes
PayloadType payloadType = PayloadType.STRINGS;
enum PayloadType {
STRINGS, BYTE_ARRAYS
}
int bytesPerCharacter = 2;
Random r = new Random();
public void testMemConsumption() throws IOException {
int kBytesCached = (bytesPerCharacter * numEntries * (payloadSize + keySize)) / 1024;
System.out.println("Bytes to be cached: " + NumberFormat.getIntegerInstance().format(kBytesCached) + " kb");
Cache c = TestCacheManagerFactory.createCacheManager().getCache();
for (int i = 0; i < numEntries; i++) {
switch (payloadType) {
case STRINGS:
c.put(generateUniqueString(i, keySize), generateRandomString(payloadSize));
break;
case BYTE_ARRAYS:
c.put(generateUniqueKey(i, keySize), generateBytePayload(payloadSize));
break;
default:
throw new CacheException("Unknown payload type");
}
if (i % 1000 == 0) System.out.println("Added " + i + " entries");
}
System.out.println("Calling System.gc()");
System.gc(); // clear any unnecessary objects
TestingUtil.sleepThread(1000); // wait for gc
// wait for manual test exit
System.out.println("Cache populated; check mem usage using jconsole, etc.!");
System.in.read();
}
private String generateUniqueString(int runNumber, int keySize) {
// string size should be exactly equal to key size but also be unique.
// start by creating a string from the run number
StringBuilder sb = new StringBuilder();
// append the run number
sb.append(runNumber);
for (int i = sb.length(); i < keySize; i++) sb.append("_");
return sb.toString();
}
private byte[] generateUniqueKey(int runNumber, int keySize) {
byte[] b = new byte[keySize];
b[0] = (byte) (runNumber);
b[1] = (byte) (runNumber >>> 8);
b[2] = (byte) (runNumber >>> 16);
b[3] = (byte) (runNumber >>> 24);
for (int i = 4; i < keySize; i++) b[i] = 0;
return b;
}
private byte[] generateBytePayload(int payloadSize) {
byte[] b = new byte[payloadSize];
Arrays.fill(b, (byte) 0);
return b;
}
private String generateRandomString(int stringSize) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < stringSize; i++) {
sb.append(r.nextInt(9)); // single digit
}
assert sb.length() == stringSize;
return sb.toString();
}
}