jdk8-mips64-public/hotspot: test/compiler/tiered/Level2RecompilationTest.java@61d955db2a5b

8222670: pathological case of JIT recompilation and code cache bloat
Summary: Prevent downgraded compilation tasks from recompiling.
Reviewed-by: sgehwolf, thartmann, andrew

     1 /*

     2  * Copyright (c) 2019, 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 Level2RecompilationTest

    26  * @summary Test downgrading mechanism from level 3 to level 2 for those profiled methods.

    27  * @library /testlibrary /testlibrary/whitebox /compiler/whitebox

    28  * @build Level2RecompilationTest

    29  * @run main ClassFileInstaller sun.hotspot.WhiteBox

    30  * @run main/othervm -Xbootclasspath/a:. -XX:+TieredCompilation

    31  *                   -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:-UseCounterDecay

    32  *                   -XX:CompileCommand=compileonly,SimpleTestCase$Helper::*

    33  *                   -XX:CompileCommand=print,SimpleTestCase$Helper::*

    34  *                   Level2RecompilationTest

    35  */

    36 public class Level2RecompilationTest extends CompLevelsTest {

    37     public static void main(String[] args) throws Throwable {

    38         if (CompilerWhiteBoxTest.skipOnTieredCompilation(false)) {

    39             throw new RuntimeException("Test isn't applicable for non-tiered mode");

    40         }

    41         String[] testcases = {"METHOD_TEST", "OSR_STATIC_TEST"};

    42         CompilerWhiteBoxTest.main(Level2RecompilationTest::new, testcases);

    43     }

    45     protected Level2RecompilationTest(TestCase testCase) {

    46         super(testCase);

    47         // to prevent inlining of #method

    48         WHITE_BOX.testSetDontInlineMethod(method, true);

    49     }

    51     @Override

    52     protected void test() throws Exception {

    53         if (skipXcompOSR()) {

    54           return;

    55         }

    57         checkNotCompiled();

    58         int bci = WHITE_BOX.getMethodEntryBci(method);

    59         WHITE_BOX.markMethodProfiled(method);

    60         if (testCase.isOsr()) {

    61             // for OSR compilation, it must be the begin of a BB.

    62             // c1_GraphBulider.cpp:153  assert(method()->bci_block_start().at(cur_bci), ...

    63             bci = 0;

    64         }

    66         WHITE_BOX.enqueueMethodForCompilation(method, COMP_LEVEL_FULL_PROFILE, bci);

    67         checkCompiled();

    68         checkLevel(COMP_LEVEL_LIMITED_PROFILE, getCompLevel());

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

    71             WHITE_BOX.enqueueMethodForCompilation(method, COMP_LEVEL_FULL_PROFILE, bci);

    72             waitBackgroundCompilation();

    73             checkLevel(COMP_LEVEL_LIMITED_PROFILE, getCompLevel());

    74         }

    75     }

    77     @Override

    78     protected void checkLevel(int expected, int actual) {

    79         if (expected == COMP_LEVEL_FULL_PROFILE

    80                 && actual == COMP_LEVEL_LIMITED_PROFILE) {

    81             // for simple method full_profile may be replaced by limited_profile

    82             if (IS_VERBOSE) {

    83                 System.out.printf("Level check: full profiling was replaced "

    84                         + "by limited profiling. Expected: %d, actual:%d\n",

    85                         expected, actual);

    86             }

    87             return;

    88         }

    89         super.checkLevel(expected, actual);

    90     }

    91 }

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

test/compiler/tiered/Level2RecompilationTest.java@61d955db2a5b

test/compiler/tiered/Level2RecompilationTest.java