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....profiler.test/src/com/oracle/truffle/tools/profiler/test/CPUSamplerMultiContextTest.java
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| /* | ||
| * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved. | ||
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| * | ||
| * This code is free software; you can redistribute it and/or modify it | ||
| * under the terms of the GNU General Public License version 2 only, as | ||
| * published by the Free Software Foundation. Oracle designates this | ||
| * particular file as subject to the "Classpath" exception as provided | ||
| * by Oracle in the LICENSE file that accompanied this code. | ||
| * | ||
| * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| * version 2 for more details (a copy is included in the LICENSE file that | ||
| * accompanied this code). | ||
| * | ||
| * You should have received a copy of the GNU General Public License version | ||
| * 2 along with this work; if not, write to the Free Software Foundation, | ||
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| * | ||
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| * or visit www.oracle.com if you need additional information or have any | ||
| * questions. | ||
| */ | ||
| package com.oracle.truffle.tools.profiler.test; | ||
|
|
||
| import java.io.ByteArrayOutputStream; | ||
| import java.io.IOException; | ||
| import java.lang.ref.WeakReference; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.concurrent.ConcurrentHashMap; | ||
| import java.util.concurrent.CountDownLatch; | ||
| import java.util.concurrent.ExecutionException; | ||
| import java.util.concurrent.ExecutorService; | ||
| import java.util.concurrent.Executors; | ||
| import java.util.concurrent.Future; | ||
| import java.util.concurrent.atomic.AtomicBoolean; | ||
| import java.util.regex.Matcher; | ||
| import java.util.regex.Pattern; | ||
|
|
||
| import org.graalvm.polyglot.Context; | ||
| import org.graalvm.polyglot.Engine; | ||
| import org.graalvm.polyglot.Source; | ||
| import org.graalvm.polyglot.Value; | ||
| import org.graalvm.polyglot.proxy.ProxyExecutable; | ||
| import org.junit.Assert; | ||
| import org.junit.Test; | ||
|
|
||
| import com.oracle.truffle.api.test.GCUtils; | ||
| import com.oracle.truffle.tools.profiler.CPUSampler; | ||
| import com.oracle.truffle.tools.profiler.StackTraceEntry; | ||
|
|
||
| public class CPUSamplerMultiContextTest { | ||
| public static final String FIB = """ | ||
| function fib(n) { | ||
| if (n < 3) { | ||
| return 1; | ||
| } else { | ||
| return fib(n - 1) + fib(n - 2); | ||
| } | ||
| } | ||
| function main() { | ||
| return fib; | ||
| } | ||
| """; | ||
|
|
||
| public static final String FIB_15_PLUS = """ | ||
| function fib15plus(n, remainder) { | ||
| if (n < 15) { | ||
| return remainder(n); | ||
| } else { | ||
| return fib15plus(n - 1, remainder) + fib15plus(n - 2, remainder); | ||
| } | ||
| } | ||
| function main() { | ||
| return fib15plus; | ||
| } | ||
| """; | ||
|
|
||
| @Test | ||
| public void testSamplerDoesNotKeepContexts() throws IOException { | ||
| ByteArrayOutputStream out = new ByteArrayOutputStream(); | ||
| try (Engine engine = Engine.newBuilder().out(out).option("cpusampler", "histogram").build()) { | ||
| List<WeakReference<Context>> contextReferences = new ArrayList<>(); | ||
| for (int i = 0; i < 27; i++) { | ||
| try (Context context = Context.newBuilder().engine(engine).build()) { | ||
| contextReferences.add(new WeakReference<>(context)); | ||
| Source src = Source.newBuilder("sl", FIB, "fib.sl").build(); | ||
| Value fib = context.eval(src); | ||
| fib.execute(29); | ||
| } | ||
| } | ||
| GCUtils.assertGc("CPUSampler prevented collecting contexts", contextReferences); | ||
| } | ||
| Pattern pattern = Pattern.compile("Sampling Histogram. Recorded (\\d+) samples"); | ||
| Matcher matcher = pattern.matcher(out.toString()); | ||
| int histogramCount = 0; | ||
| while (matcher.find()) { | ||
| histogramCount++; | ||
| Assert.assertTrue("Histogram no. " + histogramCount + " didn't contain any samples.", Integer.parseInt(matcher.group(1)) > 0); | ||
| } | ||
| Assert.assertEquals(27, histogramCount); | ||
| } | ||
|
|
||
| static class RootCounter { | ||
| int fibCount; | ||
| int fib15plusCount; | ||
| } | ||
|
|
||
| @Test | ||
| public void testMultiThreadedAndMultiContextPerThread() throws InterruptedException, ExecutionException, IOException { | ||
| try (Engine engine = Engine.create(); ExecutorService executorService = Executors.newFixedThreadPool(10)) { | ||
| AtomicBoolean runFlag = new AtomicBoolean(true); | ||
| CPUSampler sampler = CPUSampler.find(engine); | ||
| int nThreads = 5; | ||
| int nSamples = 5; | ||
| Map<Thread, RootCounter> threads = new ConcurrentHashMap<>(); | ||
| List<Future<?>> futures = new ArrayList<>(); | ||
| CountDownLatch fibLatch = new CountDownLatch(nThreads); | ||
| Source src1 = Source.newBuilder("sl", FIB_15_PLUS, "fib15plus.sl").build(); | ||
| Source src2 = Source.newBuilder("sl", FIB, "fib.sl").build(); | ||
| for (int i = 0; i < nThreads; i++) { | ||
| futures.add(executorService.submit(() -> { | ||
| threads.putIfAbsent(Thread.currentThread(), new RootCounter()); | ||
| AtomicBoolean countedDown = new AtomicBoolean(); | ||
| while (runFlag.get()) { | ||
| try (Context context1 = Context.newBuilder().engine(engine).build(); Context context2 = Context.newBuilder().engine(engine).build()) { | ||
| Value fib15plus = context1.eval(src1); | ||
| Value fib = context2.eval(src2); | ||
| ProxyExecutable proxyExecutable = (n) -> { | ||
| if (countedDown.compareAndSet(false, true)) { | ||
| fibLatch.countDown(); | ||
| } | ||
| return fib.execute((Object[]) n); | ||
| }; | ||
| Assert.assertEquals(514229, fib15plus.execute(29, proxyExecutable).asInt()); | ||
| } | ||
| } | ||
| })); | ||
| } | ||
| fibLatch.await(); | ||
| for (int i = 0; i < nSamples; i++) { | ||
| Map<Thread, List<StackTraceEntry>> sample = sampler.takeSample(); | ||
| for (Map.Entry<Thread, List<StackTraceEntry>> sampleEntry : sample.entrySet()) { | ||
| RootCounter rootCounter = threads.get(sampleEntry.getKey()); | ||
| for (StackTraceEntry stackTraceEntry : sampleEntry.getValue()) { | ||
| if ("fib".equals(stackTraceEntry.getRootName())) { | ||
| rootCounter.fibCount++; | ||
| } | ||
| if ("fib15plus".equals(stackTraceEntry.getRootName())) { | ||
| rootCounter.fib15plusCount++; | ||
| } | ||
| } | ||
| } | ||
| } | ||
| runFlag.set(false); | ||
| for (Future<?> future : futures) { | ||
| future.get(); | ||
| } | ||
| for (Map.Entry<Thread, RootCounter> threadEntry : threads.entrySet()) { | ||
| Assert.assertTrue(nSamples + " samples should contain at least 1 occurrence of the fib root for each thread, but one thread contained only " + threadEntry.getValue().fibCount, | ||
| threadEntry.getValue().fibCount > 1); | ||
| Assert.assertTrue(nSamples + " samples should contain at least 10 occurrences of the fib15plus root, but one thread contained only " + threadEntry.getValue().fib15plusCount, | ||
| threadEntry.getValue().fib15plusCount > 10); | ||
| } | ||
| } | ||
| } | ||
| } |
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