| /******************************************************************************* |
| * Copyright (c) 2012, 2014 Ericsson |
| * |
| * All rights reserved. This program and the accompanying materials are |
| * made available under the terms of the Eclipse Public License 2.0 which |
| * accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Matthew Khouzam - Initial API and implementation |
| * Alexandre Montplaisir - Convert to a org.eclipse.test.performance test |
| *******************************************************************************/ |
| |
| package org.eclipse.tracecompass.ctf.core.tests.perf.trace; |
| |
| import static org.junit.Assert.fail; |
| |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Random; |
| |
| import org.eclipse.test.performance.Dimension; |
| import org.eclipse.test.performance.Performance; |
| import org.eclipse.test.performance.PerformanceMeter; |
| import org.eclipse.tracecompass.ctf.core.CTFException; |
| import org.eclipse.tracecompass.ctf.core.event.IEventDefinition; |
| import org.eclipse.tracecompass.ctf.core.tests.shared.CtfTestTraceUtils; |
| import org.eclipse.tracecompass.ctf.core.trace.CTFTrace; |
| import org.eclipse.tracecompass.ctf.core.trace.CTFTraceReader; |
| import org.eclipse.tracecompass.testtraces.ctf.CtfTestTrace; |
| import org.junit.Test; |
| |
| /** |
| * Tests for performance regressions of the ctf reader. It only tests the ctf |
| * reader, not tmf. <br> |
| * This test runs in 3 passes. |
| * <ul> |
| * <li>first it opens a trace</li> |
| * <li>then it reads the trace completely</li> |
| * <li>then it randomly (seeded) seeks NB_SEEKS locations in the trace and reads |
| * one event at each position.</li> |
| * </ul> |
| * |
| * @author Matthew Khouzam |
| * @author Alexandre Montplaisir |
| */ |
| public class TraceSeekBenchmark { |
| |
| private static final Random RND = new Random(1000); |
| |
| private static final int LOOP_COUNT = 25; |
| private static final int NB_SEEKS = 500; |
| private static final String TEST_SUITE_NAME = "CTF Read & Seek Benchmark (" + NB_SEEKS + " seeks)"; |
| private static final String TEST_ID = "org.eclipse.linuxtools#" + TEST_SUITE_NAME; |
| |
| /** |
| * Run the benchmark scenario for the trace "kernel" |
| * |
| * @throws CTFException |
| * Should not happen |
| */ |
| @Test |
| public void testKernelTrace() throws CTFException { |
| readAndSeekTrace(CtfTestTrace.KERNEL, "trace-kernel", true); |
| } |
| |
| private static void readAndSeekTrace(CtfTestTrace testTrace, String testName, boolean inGlobalSummary) throws CTFException { |
| Performance perf = Performance.getDefault(); |
| PerformanceMeter pm = perf.createPerformanceMeter(TEST_ID + '#' + testName); |
| perf.tagAsSummary(pm, TEST_SUITE_NAME + ':' + testName, Dimension.CPU_TIME); |
| |
| if (inGlobalSummary) { |
| perf.tagAsGlobalSummary(pm, TEST_SUITE_NAME + ':' + testName, Dimension.CPU_TIME); |
| } |
| |
| for (int loop = 0; loop < LOOP_COUNT; loop++) { |
| CTFTrace trace = CtfTestTraceUtils.getTrace(testTrace); |
| try (CTFTraceReader traceReader = new CTFTraceReader(trace);) { |
| |
| /* Read the whole trace to find out the start and end times */ |
| IEventDefinition firstEvent = traceReader.getCurrentEventDef(); |
| final long startTime = firstEvent.getTimestamp(); |
| long endTime = startTime; |
| while (traceReader.hasMoreEvents()) { |
| IEventDefinition ev = traceReader.getCurrentEventDef(); |
| endTime = ev.getTimestamp(); |
| traceReader.advance(); |
| } |
| |
| /* Generate the timestamps we will seek to */ |
| List<Long> seekTimestamps = new LinkedList<>(); |
| final long range = endTime - startTime; |
| for (int i = 0; i < NB_SEEKS; i++) { |
| long delta = (RND.nextLong() % range); |
| if (delta < 0) { |
| delta += range; |
| } |
| seekTimestamps.add(startTime + delta); |
| } |
| |
| /* Benchmark seeking to the generated timestamps */ |
| pm.start(); |
| for (Long ts : seekTimestamps) { |
| traceReader.seek(ts); |
| traceReader.advance(); |
| } |
| pm.stop(); |
| |
| } catch (CTFException e) { |
| /* Should not happen if assumeTrue() passed above */ |
| fail("Test failed at iteration " + loop + ':' + e.getMessage()); |
| } |
| } |
| pm.commit(); |
| } |
| } |