/*
* Copyright (c) 2016, 2018, Red Hat, Inc. All rights reserved.
*
* 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.
*
*/
/*
* @test TestAllocHumongousFragment
* @summary Make sure Shenandoah can recover from humongous allocation fragmentation
* @key gc
* @requires vm.gc.Shenandoah & !vm.graal.enabled
*
* @run main/othervm -Xmx1g -Xms1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahTargetNumRegions=2048
* -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
* -XX:-ShenandoahDegeneratedGC -XX:+ShenandoahVerify
* TestAllocHumongousFragment
*
* @run main/othervm -Xmx1g -Xms1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahTargetNumRegions=2048
* -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
* -XX:+ShenandoahDegeneratedGC -XX:+ShenandoahVerify
* TestAllocHumongousFragment
*
* @run main/othervm -Xmx1g -Xms1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahTargetNumRegions=2048
* -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
* -XX:-ShenandoahDegeneratedGC
* TestAllocHumongousFragment
*
* @run main/othervm -Xmx1g -Xms1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahTargetNumRegions=2048
* -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
* -XX:+ShenandoahDegeneratedGC
* TestAllocHumongousFragment
*/
/*
* @test TestAllocHumongousFragment
* @summary Make sure Shenandoah can recover from humongous allocation fragmentation
* @key gc
* @requires vm.gc.Shenandoah & !vm.graal.enabled
*
* @run main/othervm -Xmx1g -Xms1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahTargetNumRegions=2048
* -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
* -XX:+ShenandoahOOMDuringEvacALot -XX:+ShenandoahVerify
* TestAllocHumongousFragment
*
* @run main/othervm -Xmx1g -Xms1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahTargetNumRegions=2048
* -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
* -XX:+ShenandoahAllocFailureALot -XX:+ShenandoahVerify
* TestAllocHumongousFragment
*
* @run main/othervm -Xmx1g -Xms1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahTargetNumRegions=2048
* -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
* -XX:+ShenandoahOOMDuringEvacALot
* TestAllocHumongousFragment
*
* @run main/othervm -Xmx1g -Xms1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahTargetNumRegions=2048
* -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
* -XX:+ShenandoahAllocFailureALot
* TestAllocHumongousFragment
*
* @run main/othervm -Xmx1g -Xms1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahTargetNumRegions=2048
* -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive
* -XX:+ShenandoahVerify
* TestAllocHumongousFragment
*
* @run main/othervm -Xmx1g -Xms1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahTargetNumRegions=2048
* -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive
* TestAllocHumongousFragment
*
* @run main/othervm -Xmx1g -Xms1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahTargetNumRegions=2048
* -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=static
* TestAllocHumongousFragment
*
* @run main/othervm -Xmx1g -Xms1g -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:ShenandoahTargetNumRegions=2048
* -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact
* TestAllocHumongousFragment
*/
/*
* @test TestAllocHumongousFragment
* @summary Make sure Shenandoah can recover from humongous allocation fragmentation
* @key gc
* @requires vm.gc.Shenandoah & !vm.graal.enabled
*
* @run main/othervm -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048
* -XX:+UseShenandoahGC -XX:ShenandoahGCMode=traversal -XX:ShenandoahGCHeuristics=aggressive
* -XX:+ShenandoahOOMDuringEvacALot -XX:+ShenandoahVerify
* TestAllocHumongousFragment
*
* @run main/othervm -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048
* -XX:+UseShenandoahGC -XX:ShenandoahGCMode=traversal -XX:ShenandoahGCHeuristics=aggressive
* -XX:+ShenandoahAllocFailureALot -XX:+ShenandoahVerify
* TestAllocHumongousFragment
*
* @run main/othervm -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048
* -XX:+UseShenandoahGC -XX:ShenandoahGCMode=traversal -XX:ShenandoahGCHeuristics=aggressive
* -XX:+ShenandoahOOMDuringEvacALot
* TestAllocHumongousFragment
*
* @run main/othervm -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048
* -XX:+UseShenandoahGC -XX:ShenandoahGCMode=traversal -XX:ShenandoahGCHeuristics=aggressive
* -XX:+ShenandoahAllocFailureALot
* TestAllocHumongousFragment
*
* @run main/othervm -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048
* -XX:+UseShenandoahGC -XX:ShenandoahGCMode=traversal
* -XX:+ShenandoahVerify
* TestAllocHumongousFragment
*
* @run main/othervm -Xlog:gc -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -Xmx1g -Xms1g -XX:ShenandoahTargetNumRegions=2048
* -XX:+UseShenandoahGC -XX:ShenandoahGCMode=traversal
* TestAllocHumongousFragment
*/
import java.util.*;
import java.util.concurrent.*;
public class TestAllocHumongousFragment {
static final long TARGET_MB = Long.getLong("target", 30_000); // 30 Gb allocations
static final long LIVE_MB = Long.getLong("occupancy", 700); // 700 Mb alive
static volatile Object sink;
static List<int[]> objects;
public static void main(String[] args) throws Exception {
final int min = 128 * 1024;
final int max = 16 * 1024 * 1024;
final long count = TARGET_MB * 1024 * 1024 / (16 + 4 * (min + (max - min) / 2));
objects = new ArrayList<>();
long current = 0;
Random r = new Random();
for (long c = 0; c < count; c++) {
while (current > LIVE_MB * 1024 * 1024) {
int idx = ThreadLocalRandom.current().nextInt(objects.size());
int[] remove = objects.remove(idx);
current -= remove.length * 4 + 16;
}
int[] newObj = new int[min + r.nextInt(max - min)];
current += newObj.length * 4 + 16;
objects.add(newObj);
sink = new Object();
System.out.println("Allocated: " + (current / 1024 / 1024) + " Mb");
}
}
}