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| 1 | +/* |
| 2 | + * |
| 3 | + * * Copyright (C) 2016 higherfrequencytrading.com |
| 4 | + * * |
| 5 | + * * This program is free software: you can redistribute it and/or modify |
| 6 | + * * it under the terms of the GNU Lesser General Public License as published by |
| 7 | + * * the Free Software Foundation, either version 3 of the License. |
| 8 | + * * |
| 9 | + * * This program is distributed in the hope that it will be useful, |
| 10 | + * * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | + * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | + * * GNU Lesser General Public License for more details. |
| 13 | + * * |
| 14 | + * * You should have received a copy of the GNU Lesser General Public License |
| 15 | + * * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 16 | + * |
| 17 | + */ |
| 18 | + |
| 19 | +package software.chronicle.enterprise.internals; |
| 20 | + |
| 21 | +import net.openhft.affinity.IAffinity; |
| 22 | +import net.openhft.affinity.impl.LinuxJNAAffinity; |
| 23 | +import net.openhft.affinity.impl.Utilities; |
| 24 | +import org.junit.After; |
| 25 | +import org.junit.Assume; |
| 26 | +import org.junit.BeforeClass; |
| 27 | +import org.junit.Test; |
| 28 | + |
| 29 | +import java.util.BitSet; |
| 30 | + |
| 31 | +import static org.junit.Assert.assertEquals; |
| 32 | +import static org.junit.Assert.assertTrue; |
| 33 | + |
| 34 | +/** |
| 35 | + * @author peter.lawrey |
| 36 | + */ |
| 37 | +public class JnaAffinityTest { |
| 38 | + protected static final int CORES = Runtime.getRuntime().availableProcessors(); |
| 39 | + protected static final BitSet CORES_MASK = new BitSet(CORES); |
| 40 | + |
| 41 | + static { |
| 42 | + CORES_MASK.set(0, CORES, true); |
| 43 | + } |
| 44 | + |
| 45 | + @BeforeClass |
| 46 | + public static void checkJniLibraryPresent() { |
| 47 | + Assume.assumeTrue(LinuxJNAAffinity.LOADED); |
| 48 | + } |
| 49 | + |
| 50 | + @Test |
| 51 | + public void getAffinityCompletesGracefully() { |
| 52 | + System.out.println("affinity: " + Utilities.toBinaryString(getImpl().getAffinity())); |
| 53 | + } |
| 54 | + |
| 55 | + @Test |
| 56 | + public void getAffinityReturnsValidValue() { |
| 57 | + final BitSet affinity = getImpl().getAffinity(); |
| 58 | + assertTrue( |
| 59 | + "Affinity mask " + Utilities.toBinaryString(affinity) + " must be non-empty", |
| 60 | + !affinity.isEmpty() |
| 61 | + ); |
| 62 | + final int allCoresMask = (1 << CORES) - 1; |
| 63 | + assertTrue( |
| 64 | + "Affinity mask " + Utilities.toBinaryString(affinity) + " must be <=(2^" + CORES + "-1 = " + allCoresMask + ")", |
| 65 | + affinity.length() <= CORES_MASK.length() |
| 66 | + ); |
| 67 | + } |
| 68 | + |
| 69 | + @Test |
| 70 | + public void setAffinityCompletesGracefully() { |
| 71 | + BitSet affinity = new BitSet(1); |
| 72 | + affinity.set(0, true); |
| 73 | + getImpl().setAffinity(affinity); |
| 74 | + } |
| 75 | + |
| 76 | + @Test |
| 77 | + public void getAffinityReturnsValuePreviouslySet() { |
| 78 | + String osName = System.getProperty("os.name"); |
| 79 | + if (!osName.startsWith("Linux")) { |
| 80 | + System.out.println("Skipping Linux tests"); |
| 81 | + return; |
| 82 | + } |
| 83 | + final IAffinity impl = LinuxJNAAffinity.INSTANCE; |
| 84 | + final int cores = CORES; |
| 85 | + for (int core = 0; core < cores; core++) { |
| 86 | + final BitSet mask = new BitSet(); |
| 87 | + mask.set(core, true); |
| 88 | + getAffinityReturnsValuePreviouslySet(impl, mask); |
| 89 | + } |
| 90 | + } |
| 91 | + |
| 92 | + |
| 93 | + @Test |
| 94 | + public void showOtherIds() { |
| 95 | + System.out.println("processId: " + LinuxJNAAffinity.INSTANCE.getProcessId()); |
| 96 | + System.out.println("threadId: " + LinuxJNAAffinity.INSTANCE.getThreadId()); |
| 97 | + System.out.println("cpu: " + LinuxJNAAffinity.INSTANCE.getCpu()); |
| 98 | + } |
| 99 | + |
| 100 | + private void getAffinityReturnsValuePreviouslySet(final IAffinity impl, |
| 101 | + final BitSet mask) { |
| 102 | + |
| 103 | + impl.setAffinity(mask); |
| 104 | + final BitSet _mask = impl.getAffinity(); |
| 105 | + assertEquals(mask, _mask); |
| 106 | + } |
| 107 | + |
| 108 | + @After |
| 109 | + public void tearDown() { |
| 110 | + getImpl().setAffinity(CORES_MASK); |
| 111 | + } |
| 112 | + |
| 113 | + public IAffinity getImpl() { |
| 114 | + return LinuxJNAAffinity.INSTANCE; |
| 115 | + } |
| 116 | +} |
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