jdk8-mips64-public/hotspot: test/compiler/c1/TestPinnedIntrinsics.java@35fe0be5277b

8184271: Time related C1 intrinsics produce inconsistent results when floating around
Summary: C1 intrinsics for System.nanoTime(), System.currentTimeMillis() and JVM.counterTime() should be pinned.
Reviewed-by: kvn, vlivanov, iveresov

     1 /*

     2  * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    24 /*

    25  * @test

    26  * @bug 8184271

    27  * @summary Test correct scheduling of System.nanoTime and System.currentTimeMillis C1 intrinsics.

    28  * @run main/othervm -XX:TieredStopAtLevel=1 -Xbatch

    29  *                   -XX:CompileCommand=dontinline,compiler.c1.TestPinnedIntrinsics::checkNanoTime

    30  *                   -XX:CompileCommand=dontinline,compiler.c1.TestPinnedIntrinsics::checkCurrentTimeMillis

    31  *                   compiler.c1.TestPinnedIntrinsics

    32  */

    34 package compiler.c1;

    36 public class TestPinnedIntrinsics {

    38     private static void testNanoTime() {

    39         long start = System.nanoTime();

    40         long end = System.nanoTime();

    41         checkNanoTime(end - start);

    42     }

    44     private static void checkNanoTime(long diff) {

    45         if (diff < 0) {

    46             throw new RuntimeException("testNanoTime failed with " + diff);

    47         }

    48     }

    50     private static void testCurrentTimeMillis() {

    51         long start = System.currentTimeMillis();

    52         long end = System.currentTimeMillis();

    53         checkCurrentTimeMillis(end - start);

    54     }

    56     private static void checkCurrentTimeMillis(long diff) {

    57         if (diff < 0) {

    58             throw new RuntimeException("testCurrentTimeMillis failed with " + diff);

    59         }

    60     }

    62     public static void main(String[] args) {

    63         for (int i = 0; i < 100_000; ++i) {

    64             testNanoTime();

    65             testCurrentTimeMillis();

    66         }

    67     }

    68 }

Mercurial > jdk8-mips64-public > hotspot / file revision

test/compiler/c1/TestPinnedIntrinsics.java@35fe0be5277b

test/compiler/c1/TestPinnedIntrinsics.java