Mercurial > hg > truffle
view test/compiler/7177917/Test7177917.java @ 10988:cd54c7e92908
8015660: Test8009761.java "Failed: init recursive calls: 24. After deopt 25"
Summary: Windows reserves and only partially commits thread stack. For detecting more thread stack space for execution, Windows installs one-shot page as guard page just before the current commited edge. It will trigger STACK_OVERFLOW_EXCEPTION when lands on last 4 pages of thread stack space. StackYellowPages default value is 2 on Windows (plus 1 page of StackRedPages, 3 pages guarded by hotspot) so the exception happens one page before Yellow pages. Same route executed second time will have one more page brought in, this leads same execution with different stack depth(interpreter mode). We need match Windows settings so the stack overflow exception will not happen before Yellow pages.
Reviewed-by: dholmes
Contributed-by: andreas.schoesser@sap.com
author | minqi |
---|---|
date | Tue, 18 Jun 2013 09:08:35 -0700 |
parents | d50605d9417e |
children |
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/* * Copyright (c) 2012, 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. * */ /* * Micro-benchmark for Math.pow() and Math.exp() */ import java.util.*; public class Test7177917 { static double d; static Random r = new Random(0); static long m_pow(double[][] values) { double res = 0; long start = System.nanoTime(); for (int i = 0; i < values.length; i++) { res += Math.pow(values[i][0], values[i][1]); } long stop = System.nanoTime(); d = res; return (stop - start) / 1000; } static long m_exp(double[] values) { double res = 0; long start = System.nanoTime(); for (int i = 0; i < values.length; i++) { res += Math.exp(values[i]); } long stop = System.nanoTime(); d = res; return (stop - start) / 1000; } static double[][] pow_values(int nb) { double[][] res = new double[nb][2]; for (int i = 0; i < nb; i++) { double ylogx = (1 + (r.nextDouble() * 2045)) - 1023; // 2045 rather than 2046 as a safety margin double x = Math.abs(Double.longBitsToDouble(r.nextLong())); while (x != x) { x = Math.abs(Double.longBitsToDouble(r.nextLong())); } double logx = Math.log(x) / Math.log(2); double y = ylogx / logx; res[i][0] = x; res[i][1] = y; } return res; } static double[] exp_values(int nb) { double[] res = new double[nb]; for (int i = 0; i < nb; i++) { double ylogx = (1 + (r.nextDouble() * 2045)) - 1023; // 2045 rather than 2046 as a safety margin double x = Math.E; double logx = Math.log(x) / Math.log(2); double y = ylogx / logx; res[i] = y; } return res; } static public void main(String[] args) { { // warmup double[][] warmup_values = pow_values(10); m_pow(warmup_values); for (int i = 0; i < 20000; i++) { m_pow(warmup_values); } // test pow perf double[][] values = pow_values(1000000); System.out.println("==> POW " + m_pow(values)); // force uncommon trap double[][] nan_values = new double[1][2]; nan_values[0][0] = Double.NaN; nan_values[0][1] = Double.NaN; m_pow(nan_values); // force recompilation for (int i = 0; i < 20000; i++) { m_pow(warmup_values); } // test pow perf again System.out.println("==> POW " + m_pow(values)); } { // warmup double[] warmup_values = exp_values(10); m_exp(warmup_values); for (int i = 0; i < 20000; i++) { m_exp(warmup_values); } // test pow perf double[] values = exp_values(1000000); System.out.println("==> EXP " + m_exp(values)); // force uncommon trap double[] nan_values = new double[1]; nan_values[0] = Double.NaN; m_exp(nan_values); // force recompilation for (int i = 0; i < 20000; i++) { m_exp(warmup_values); } // test pow perf again System.out.println("==> EXP " + m_exp(values)); } } }