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test/compiler/7177917/Test7177917.java@dbb05f6d93c4 (annotated)

test/compiler/7177917/Test7177917.java

Mon, 28 Jul 2014 15:06:38 -0700

author

fzhinkin

date

Mon, 28 Jul 2014 15:06:38 -0700

changeset 6997

dbb05f6d93c4

parent 0

f90c822e73f8

child 9954

1f0cffcf648a

permissions

-rw-r--r--

8051344: JVM crashed in Compile::start() during method parsing w/ UseRTMDeopt turned on
Summary: call rtm_deopt() only if there were no compilation bailouts before.
Reviewed-by: kvn

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	/*
aoqi@0	26	* Micro-benchmark for Math.pow() and Math.exp()
aoqi@0	27	*/
aoqi@0	28
aoqi@0	29	import java.util.*;
aoqi@0	30
aoqi@0	31	public class Test7177917 {
aoqi@0	32
aoqi@0	33	static double d;
aoqi@0	34
aoqi@0	35	static Random r = new Random(0);
aoqi@0	36
aoqi@0	37	static long m_pow(double[][] values) {
aoqi@0	38	double res = 0;
aoqi@0	39	long start = System.nanoTime();
aoqi@0	40	for (int i = 0; i < values.length; i++) {
aoqi@0	41	res += Math.pow(values[i][0], values[i][1]);
aoqi@0	42	}
aoqi@0	43	long stop = System.nanoTime();
aoqi@0	44	d = res;
aoqi@0	45	return (stop - start) / 1000;
aoqi@0	46	}
aoqi@0	47
aoqi@0	48	static long m_exp(double[] values) {
aoqi@0	49	double res = 0;
aoqi@0	50	long start = System.nanoTime();
aoqi@0	51	for (int i = 0; i < values.length; i++) {
aoqi@0	52	res += Math.exp(values[i]);
aoqi@0	53	}
aoqi@0	54	long stop = System.nanoTime();
aoqi@0	55	d = res;
aoqi@0	56	return (stop - start) / 1000;
aoqi@0	57	}
aoqi@0	58
aoqi@0	59	static double[][] pow_values(int nb) {
aoqi@0	60	double[][] res = new double[nb][2];
aoqi@0	61	for (int i = 0; i < nb; i++) {
aoqi@0	62	double ylogx = (1 + (r.nextDouble() * 2045)) - 1023; // 2045 rather than 2046 as a safety margin
aoqi@0	63	double x = Math.abs(Double.longBitsToDouble(r.nextLong()));
aoqi@0	64	while (x != x) {
aoqi@0	65	x = Math.abs(Double.longBitsToDouble(r.nextLong()));
aoqi@0	66	}
aoqi@0	67	double logx = Math.log(x) / Math.log(2);
aoqi@0	68	double y = ylogx / logx;
aoqi@0	69
aoqi@0	70	res[i][0] = x;
aoqi@0	71	res[i][1] = y;
aoqi@0	72	}
aoqi@0	73	return res;
aoqi@0	74	}
aoqi@0	75
aoqi@0	76	static double[] exp_values(int nb) {
aoqi@0	77	double[] res = new double[nb];
aoqi@0	78	for (int i = 0; i < nb; i++) {
aoqi@0	79	double ylogx = (1 + (r.nextDouble() * 2045)) - 1023; // 2045 rather than 2046 as a safety margin
aoqi@0	80	double x = Math.E;
aoqi@0	81	double logx = Math.log(x) / Math.log(2);
aoqi@0	82	double y = ylogx / logx;
aoqi@0	83	res[i] = y;
aoqi@0	84	}
aoqi@0	85	return res;
aoqi@0	86	}
aoqi@0	87
aoqi@0	88	static public void main(String[] args) {
aoqi@0	89	{
aoqi@0	90	// warmup
aoqi@0	91	double[][] warmup_values = pow_values(10);
aoqi@0	92	m_pow(warmup_values);
aoqi@0	93
aoqi@0	94	for (int i = 0; i < 20000; i++) {
aoqi@0	95	m_pow(warmup_values);
aoqi@0	96	}
aoqi@0	97	// test pow perf
aoqi@0	98	double[][] values = pow_values(1000000);
aoqi@0	99	System.out.println("==> POW " + m_pow(values));
aoqi@0	100
aoqi@0	101	// force uncommon trap
aoqi@0	102	double[][] nan_values = new double[1][2];
aoqi@0	103	nan_values[0][0] = Double.NaN;
aoqi@0	104	nan_values[0][1] = Double.NaN;
aoqi@0	105	m_pow(nan_values);
aoqi@0	106
aoqi@0	107	// force recompilation
aoqi@0	108	for (int i = 0; i < 20000; i++) {
aoqi@0	109	m_pow(warmup_values);
aoqi@0	110	}
aoqi@0	111
aoqi@0	112	// test pow perf again
aoqi@0	113	System.out.println("==> POW " + m_pow(values));
aoqi@0	114	}
aoqi@0	115	{
aoqi@0	116	// warmup
aoqi@0	117	double[] warmup_values = exp_values(10);
aoqi@0	118	m_exp(warmup_values);
aoqi@0	119
aoqi@0	120	for (int i = 0; i < 20000; i++) {
aoqi@0	121	m_exp(warmup_values);
aoqi@0	122	}
aoqi@0	123
aoqi@0	124	// test pow perf
aoqi@0	125	double[] values = exp_values(1000000);
aoqi@0	126	System.out.println("==> EXP " + m_exp(values));
aoqi@0	127
aoqi@0	128	// force uncommon trap
aoqi@0	129	double[] nan_values = new double[1];
aoqi@0	130	nan_values[0] = Double.NaN;
aoqi@0	131	m_exp(nan_values);
aoqi@0	132
aoqi@0	133	// force recompilation
aoqi@0	134	for (int i = 0; i < 20000; i++) {
aoqi@0	135	m_exp(warmup_values);
aoqi@0	136	}
aoqi@0	137
aoqi@0	138	// test pow perf again
aoqi@0	139	System.out.println("==> EXP " + m_exp(values));
aoqi@0	140	}
aoqi@0	141	}
aoqi@0	142	}