jdk-24/test/hotspot/jtreg/gc/x/TestMemoryManagerMXBean.java
Axel Boldt-Christmas a0595761ef 8310187: Improve Generational ZGC jtreg testing
Reviewed-by: stefank, eosterlund, stuefe
2023-06-20 10:08:13 +00:00

93 lines
3.3 KiB
Java

/*
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* version 2 for more details (a copy is included in the LICENSE file that
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*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package gc.x;
/**
* @test TestMemoryManagerMXBean
* @requires vm.gc.ZSinglegen
* @summary Test ZGC memory manager MXBean
* @modules java.management
* @run main/othervm -XX:+UseZGC -XX:-ZGenerational -Xmx128M gc.x.TestMemoryManagerMXBean
*/
import java.lang.management.ManagementFactory;
public class TestMemoryManagerMXBean {
private static void checkName(String name) throws Exception {
if (name == null || name.length() == 0) {
throw new Exception("Invalid name");
}
}
public static void main(String[] args) throws Exception {
int zgcCyclesMemoryManagers = 0;
int zgcPausesMemoryManagers = 0;
int zgcCyclesMemoryPools = 0;
int zgcPausesMemoryPools = 0;
for (final var memoryManager : ManagementFactory.getMemoryManagerMXBeans()) {
final var memoryManagerName = memoryManager.getName();
checkName(memoryManagerName);
System.out.println("MemoryManager: " + memoryManagerName);
if (memoryManagerName.equals("ZGC Cycles")) {
zgcCyclesMemoryManagers++;
} else if (memoryManagerName.equals("ZGC Pauses")) {
zgcPausesMemoryManagers++;
}
for (final var memoryPoolName : memoryManager.getMemoryPoolNames()) {
checkName(memoryPoolName);
System.out.println(" MemoryPool: " + memoryPoolName);
if (memoryPoolName.equals("ZHeap")) {
if (memoryManagerName.equals("ZGC Cycles")) {
zgcCyclesMemoryPools++;
} else if (memoryManagerName.equals("ZGC Pauses")) {
zgcPausesMemoryPools++;
}
}
}
}
if (zgcCyclesMemoryManagers != 1) {
throw new Exception("Unexpected number of cycle MemoryManagers");
}
if (zgcPausesMemoryManagers != 1) {
throw new Exception("Unexpected number of pause MemoryManagers");
}
if (zgcCyclesMemoryPools != 1) {
throw new Exception("Unexpected number of cycle MemoryPools");
}
if (zgcPausesMemoryPools != 1) {
throw new Exception("Unexpected number of pause MemoryPools");
}
}
}