Mercurial > hg > truffle
view test/compiler/6894807/IsInstanceTest.java @ 2134:b158bed62ef5
6994297: G1: do first-level slow-path allocations with a CAS
Summary: First attempt to allocate out the current alloc region using a CAS instead of taking the Heap_lock (first level of G1's slow allocation path). Only if that fails and it's necessary to replace the current alloc region take the Heap_lock (that's the second level of G1's slow allocation path).
Reviewed-by: johnc, brutisso, ysr
author | tonyp |
---|---|
date | Wed, 12 Jan 2011 16:34:25 -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 { } }