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TestMetaspaceAllocationMT2.java
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TestMetaspaceAllocationMT2.java
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/*
* Copyright (c) 2020, 2023 SAP SE. All rights reserved.
* Copyright (c) 2020, 2023, 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.
*
*/
/*
* This is a stress test for allocating from a single MetaspaceArena from
* multiple threads, optionally with reserve limit (mimicking the non-expandable CompressedClassSpace)
* or commit limit (mimimcking MaxMetaspaceSize).
*
* The test threads will start to allocate from the Arena, and occasionally deallocate.
* The threads run with a safety allocation max; if reached (or, if the underlying arena
* hits either commit or reserve limit, if given) they will switch to deallocation and then
* kind of float at the allocation ceiling, alternating between allocation and deallocation.
*
* We test with various flags, to exercise all 3 reclaim policies (none, balanced (default)
* and aggessive) as well as one run with allocation guards enabled.
*
* We also set MetaspaceVerifyInterval very low to trigger many verifications in debug vm.
*
*/
/*
* @test id=debug-default
* @library /test/lib
* @modules java.base/jdk.internal.misc
* java.management
* @build jdk.test.whitebox.WhiteBox
* @key randomness
* @requires (vm.debug == true)
*
* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
*
* @run main/othervm/timeout=400
* -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
* -XX:VerifyMetaspaceInterval=10
* TestMetaspaceAllocationMT2 3
*/
/*
* @test id=debug-default-strict
* @library /test/lib
* @modules java.base/jdk.internal.misc
* java.management
* @build jdk.test.whitebox.WhiteBox
* @key randomness
* @requires (vm.debug == true)
*
* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
*
* @run main/othervm/manual
* -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
* -XX:VerifyMetaspaceInterval=10
* TestMetaspaceAllocationMT2 10
*/
/*
* @test id=debug-guard
* @library /test/lib
* @modules java.base/jdk.internal.misc
* java.management
* @build jdk.test.whitebox.WhiteBox
* @key randomness
* @requires (vm.debug == true)
*
* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
*
* @run main/othervm/timeout=400
* -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
* -XX:VerifyMetaspaceInterval=10
* -XX:+MetaspaceGuardAllocations
* TestMetaspaceAllocationMT2 3
*/
/*
* @test id=ndebug-default
* @library /test/lib
* @modules java.base/jdk.internal.misc
* java.management
* @build jdk.test.whitebox.WhiteBox
* @key randomness
* @requires (vm.debug == false)
*
* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
*
* @run main/othervm/timeout=400
* -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
* TestMetaspaceAllocationMT2 3
*/
public class TestMetaspaceAllocationMT2 {
public static void main(String[] args) throws Exception {
final long testAllocationCeiling = 1024 * 1024 * 6; // 8m words = 64M on 64bit
final int numThreads = 4;
final int seconds = Integer.parseInt(args[0]);
for (int i = 0; i < 3; i ++) {
long commitLimit = (i == 1) ? 1024 * 256 : 0;
// Note: reserve limit must be a multiple of Metaspace::reserve_alignment_words()
long reserveLimit = (i == 2) ? Settings.rootChunkWordSize * 2 : 0;
System.out.println("#### Test: ");
System.out.println("#### testAllocationCeiling: " + testAllocationCeiling);
System.out.println("#### numThreads: " + numThreads);
System.out.println("#### seconds: " + seconds);
System.out.println("#### commitLimit: " + commitLimit);
System.out.println("#### reserveLimit: " + reserveLimit);
System.out.println("#### guards: " + Settings.settings().usesAllocationGuards);
MetaspaceTestContext context = new MetaspaceTestContext(commitLimit, reserveLimit);
MetaspaceTestManyArenasManyThreads test = new MetaspaceTestManyArenasManyThreads(context, testAllocationCeiling, numThreads, seconds);
try {
test.runTest();
} catch (RuntimeException e) {
System.out.println(e);
context.printToTTY();
throw e;
}
context.destroy();
System.out.println("#### Done. ####");
System.out.println("###############");
}
}
}