/*
* Copyright 2016 higherfrequencytrading.com
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package software.chronicle.enterprise.internals;
import net.openhft.affinity.IAffinity;
import net.openhft.affinity.impl.LinuxJNAAffinity;
import net.openhft.affinity.impl.Utilities;
import org.junit.*;
import software.chronicle.enterprise.internals.impl.NativeAffinity;
import java.util.BitSet;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
/**
* @author peter.lawrey
*/
public class NativeAffinityTest {
protected static final int CORES = Runtime.getRuntime().availableProcessors();
protected static final BitSet CORES_MASK = new BitSet(CORES);
static {
CORES_MASK.set(0, CORES, true);
}
@BeforeClass
public static void checkJniLibraryPresent() {
Assume.assumeTrue(NativeAffinity.LOADED);
}
@Test
public void getAffinityCompletesGracefully() {
System.out.println("affinity: " + Utilities.toBinaryString(getImpl().getAffinity()));
}
@Test
public void getAffinityReturnsValidValue() {
final BitSet affinity = getImpl().getAffinity();
assertTrue(
"Affinity mask " + Utilities.toBinaryString(affinity) + " must be non-empty",
!affinity.isEmpty()
);
final int allCoresMask = (1 << CORES) - 1;
assertTrue(
"Affinity mask " + Utilities.toBinaryString(affinity) + " must be <=(2^" + CORES + "-1 = " + allCoresMask + ")",
affinity.length() <= CORES_MASK.length()
);
}
@Test
public void setAffinityCompletesGracefully() {
BitSet affinity = new BitSet(1);
affinity.set(0, true);
getImpl().setAffinity(affinity);
}
@Test
@Ignore("TODO AFFINITY-25")
public void getAffinityReturnsValuePreviouslySet() {
String osName = System.getProperty("os.name");
if (!osName.startsWith("Linux")) {
System.out.println("Skipping Linux tests");
return;
}
final IAffinity impl = NativeAffinity.INSTANCE;
final int cores = CORES;
for (int core = 0; core < cores; core++) {
final BitSet mask = new BitSet();
mask.set(core, true);
getAffinityReturnsValuePreviouslySet(impl, mask);
}
}
@Test
@Ignore("TODO AFFINITY-25")
public void JNAwithJNI() {
String osName = System.getProperty("os.name");
if (!osName.startsWith("Linux")) {
System.out.println("Skipping Linux tests");
return;
}
int nbits = Runtime.getRuntime().availableProcessors();
BitSet affinity = new BitSet(nbits);
affinity.set(1);
NativeAffinity.INSTANCE.setAffinity(affinity);
BitSet affinity2 = LinuxJNAAffinity.INSTANCE.getAffinity();
assertEquals(1, NativeAffinity.INSTANCE.getCpu());
assertEquals(affinity, affinity2);
affinity.clear();
affinity.set(2);
LinuxJNAAffinity.INSTANCE.setAffinity(affinity);
BitSet affinity3 = NativeAffinity.INSTANCE.getAffinity();
assertEquals(2, LinuxJNAAffinity.INSTANCE.getCpu());
assertEquals(affinity, affinity3);
affinity.set(0, nbits);
LinuxJNAAffinity.INSTANCE.setAffinity(affinity);
}
@Test
public void showOtherIds() {
System.out.println("processId: " + NativeAffinity.INSTANCE.getProcessId());
System.out.println("threadId: " + NativeAffinity.INSTANCE.getThreadId());
System.out.println("cpu: " + NativeAffinity.INSTANCE.getCpu());
}
private void getAffinityReturnsValuePreviouslySet(final IAffinity impl,
final BitSet mask) {
impl.setAffinity(mask);
final BitSet _mask = impl.getAffinity();
assertEquals(mask, _mask);
}
@After
public void tearDown() {
getImpl().setAffinity(CORES_MASK);
}
public IAffinity getImpl() {
return NativeAffinity.INSTANCE;
}
}