Mercurial > hg > graal-compiler
view test/compiler/6823354/Test6823354.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 | c18cbe5936b8 |
children |
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/* * Copyright (c) 2009, 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. * * 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. */ /** * @test * @bug 6823354 * @summary These methods can be instrinsified by using bit scan, bit test, and population count instructions. * * @run main/othervm -Xcomp -XX:CompileOnly=Test6823354.lzcomp,Test6823354.tzcomp,.dolzcomp,.dotzcomp Test6823354 */ import java.net.URLClassLoader; public class Test6823354 { // Arrays of corner case values. static final int[] ia = new int[] { 0, 1, -1, Integer.MIN_VALUE, Integer.MAX_VALUE }; static final long[] la = new long[] { 0L, 1L, -1L, Long.MIN_VALUE, Long.MAX_VALUE }; public static void main(String[] args) throws Exception { // Load the classes and the methods. Integer.numberOfLeadingZeros(0); Integer.numberOfTrailingZeros(0); Long.numberOfLeadingZeros(0); Long.numberOfTrailingZeros(0); lz(); tz(); } static void lz() throws Exception { // int // Test corner cases. for (int i = 0; i < ia.length; i++) { int x = ia[i]; check(x, lzcomp(x), lzint(x)); } // Test all possible return values. for (int i = 0; i < Integer.SIZE; i++) { int x = 1 << i; check(x, lzcomp(x), lzint(x)); } String classname = "Test6823354$lzconI"; // Test Ideal optimizations (constant values). for (int i = 0; i < ia.length; i++) { testclass(classname, ia[i]); } // Test Ideal optimizations (constant values). for (int i = 0; i < Integer.SIZE; i++) { int x = 1 << i; testclass(classname, x); } // long // Test corner cases. for (int i = 0; i < ia.length; i++) { long x = la[i]; check(x, lzcomp(x), lzint(x)); } // Test all possible return values. for (int i = 0; i < Long.SIZE; i++) { long x = 1L << i; check(x, lzcomp(x), lzint(x)); } classname = "Test6823354$lzconL"; // Test Ideal optimizations (constant values). for (int i = 0; i < la.length; i++) { testclass(classname, la[i]); } // Test Ideal optimizations (constant values). for (int i = 0; i < Long.SIZE; i++) { long x = 1L << i; testclass(classname, x); } } static void tz() throws Exception { // int // Test corner cases. for (int i = 0; i < ia.length; i++) { int x = ia[i]; check(x, tzcomp(x), tzint(x)); } // Test all possible return values. for (int i = 0; i < Integer.SIZE; i++) { int x = 1 << i; check(x, tzcomp(x), tzint(x)); } String classname = "Test6823354$tzconI"; // Test Ideal optimizations (constant values). for (int i = 0; i < ia.length; i++) { testclass(classname, ia[i]); } // Test Ideal optimizations (constant values). for (int i = 0; i < Integer.SIZE; i++) { int x = 1 << i; testclass(classname, x); } // long // Test corner cases. for (int i = 0; i < la.length; i++) { long x = la[i]; check(x, tzcomp(x), tzint(x)); } // Test all possible return values. for (int i = 0; i < Long.SIZE; i++) { long x = 1L << i; check(x, tzcomp(x), tzint(x)); } classname = "Test6823354$tzconL"; // Test Ideal optimizations (constant values). for (int i = 0; i < la.length; i++) { testclass(classname, la[i]); } // Test Ideal optimizations (constant values). for (int i = 0; i < Long.SIZE; i++) { long x = 1L << i; testclass(classname, x); } } static void check(int value, int result, int expected) { //System.out.println(value + ": " + result + ", " + expected); if (result != expected) throw new InternalError(value + " failed: " + result + " != " + expected); } static void check(long value, long result, long expected) { //System.out.println(value + ": " + result + ", " + expected); if (result != expected) throw new InternalError(value + " failed: " + result + " != " + expected); } static int lzint( int i) { return Integer.numberOfLeadingZeros(i); } static int lzcomp(int i) { return Integer.numberOfLeadingZeros(i); } static int lzint( long l) { return Long.numberOfLeadingZeros(l); } static int lzcomp(long l) { return Long.numberOfLeadingZeros(l); } static int tzint( int i) { return Integer.numberOfTrailingZeros(i); } static int tzcomp(int i) { return Integer.numberOfTrailingZeros(i); } static int tzint( long l) { return Long.numberOfTrailingZeros(l); } static int tzcomp(long l) { return Long.numberOfTrailingZeros(l); } static void testclass(String classname, int x) throws Exception { System.setProperty("value", "" + x); loadandrunclass(classname); } static void testclass(String classname, long x) throws Exception { System.setProperty("value", "" + x); loadandrunclass(classname); } static void loadandrunclass(String classname) throws Exception { Class cl = Class.forName(classname); URLClassLoader apploader = (URLClassLoader) cl.getClassLoader(); ClassLoader loader = new URLClassLoader(apploader.getURLs(), apploader.getParent()); Class c = loader.loadClass(classname); Runnable r = (Runnable) c.newInstance(); r.run(); } public static class lzconI implements Runnable { static final int VALUE; static { int value = 0; try { value = Integer.decode(System.getProperty("value")); } catch (Throwable e) {} VALUE = value; } public void run() { check(VALUE, lzint(VALUE), dolzcomp()); } static int dolzcomp() { return lzcomp(VALUE); } } public static class lzconL implements Runnable { static final long VALUE; static { long value = 0; try { value = Long.decode(System.getProperty("value")); } catch (Throwable e) {} VALUE = value; } public void run() { check(VALUE, lzint(VALUE), dolzcomp()); } static int dolzcomp() { return lzcomp(VALUE); } } public static class tzconI implements Runnable { static final int VALUE; static { int value = 0; try { value = Integer.decode(System.getProperty("value")); } catch (Throwable e) {} VALUE = value; } public void run() { check(VALUE, tzint(VALUE), dotzcomp()); } static int dotzcomp() { return tzcomp(VALUE); } } public static class tzconL implements Runnable { static final long VALUE; static { long value = 0; try { value = Long.decode(System.getProperty("value")); } catch (Throwable e) {} VALUE = value; } public void run() { check(VALUE, tzint(VALUE), dotzcomp()); } static int dotzcomp() { return tzcomp(VALUE); } } }