Mercurial > hg > graal-compiler
view test/compiler/6894807/IsInstanceTest.java @ 2149:7e37af9d69ef
7011379: G1: overly long concurrent marking cycles
Summary: This changeset introduces filtering of SATB buffers at the point when they are about to be enqueued. If this filtering clears enough entries on each buffer, the buffer can then be re-used and not enqueued. This cuts down the number of SATB buffers that need to be processed by the concurrent marking threads.
Reviewed-by: johnc, ysr
author | tonyp |
---|---|
date | Wed, 19 Jan 2011 09:35:17 -0500 |
parents | 495caa35b1b5 |
children |
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/* * @test * @bug 6894807 * @summary No ClassCastException for HashAttributeSet constructors if run with -Xcomp * @compile IsInstanceTest.java * @run shell Test6894807.sh */ public class IsInstanceTest { public static void main(String[] args) { BaseInterface baseInterfaceImpl = new BaseInterfaceImpl(); for (int i = 0; i < 100000; i++) { if (isInstanceOf(baseInterfaceImpl, ExtendedInterface.class)) { System.out.println("Failed at index:" + i); System.out.println("Arch: "+System.getProperty("os.arch", "")+ " OS: "+System.getProperty("os.name", "")+ " OSV: "+System.getProperty("os.version", "")+ " Cores: "+Runtime.getRuntime().availableProcessors()+ " JVM: "+System.getProperty("java.version", "")+" "+System.getProperty("sun.arch.data.model", "")); break; } } System.out.println("Done!"); } public static boolean isInstanceOf(BaseInterface baseInterfaceImpl, Class... baseInterfaceClasses) { for (Class baseInterfaceClass : baseInterfaceClasses) { if (baseInterfaceClass.isInstance(baseInterfaceImpl)) { return true; } } return false; } private interface BaseInterface { } private interface ExtendedInterface extends BaseInterface { } private static class BaseInterfaceImpl implements BaseInterface { } }