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8160827: gc/stress/TestStressG1Humongous.java fails with OOME

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Reviewed-by: tschatzl
This commit is contained in:
Michail Chernov 2016-07-19 18:15:46 +03:00
parent 5075c7b9a0
commit c6f30feaec
1 changed files with 7 additions and 5 deletions
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12
hotspot/test/gc/stress/TestStressG1Humongous.java
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@ -26,9 +26,6 @@
* @key gc
* @key stress
* @summary Stress G1 by humongous allocations in situation near OOM
* Fails intermittently on 32-bit VMs due to 8160827 so quarantine
* it on those platforms:
* @requires vm.bits != "32"
* @requires vm.gc.G1
* @requires !vm.flightRecorder
* @run main/othervm/timeout=200 -Xlog:gc=debug -Xmx1g -XX:+UseG1GC -XX:G1HeapRegionSize=4m
@ -56,6 +53,7 @@ public class TestStressG1Humongous {
private static final int THREAD_COUNT = Integer.getInteger("threads", 2);
private static final int REGION_SIZE = Integer.getInteger("regionsize", 1) * 1024 * 1024;
private static final int HUMONGOUS_SIZE = (int) (REGION_SIZE * Double.parseDouble(System.getProperty("humongoussize", "1.5")));
private static final int NUMBER_OF_FREE_REGIONS = 2;
private volatile boolean isRunning;
private final ExecutorService threadExecutor;
@ -95,8 +93,12 @@ public class TestStressG1Humongous {
private int getExpectedAmountOfObjects() {
long maxMem = Runtime.getRuntime().maxMemory();
int expectedHObjects = (int) (maxMem / HUMONGOUS_SIZE);
// Will allocate 1 region less to give some free space for VM.
int checkedAmountOfHObjects = checkHeapCapacity(expectedHObjects) - 1;
// Will allocate NUMBER_OF_FREE_REGIONS region less to give some free space for VM.
int checkedAmountOfHObjects = checkHeapCapacity(expectedHObjects) - NUMBER_OF_FREE_REGIONS;
if (checkedAmountOfHObjects <= 0) {
throw new RuntimeException("Cannot start testing because selected maximum heap "
+ "is not large enough to contain more than " + NUMBER_OF_FREE_REGIONS + " regions");
}
return checkedAmountOfHObjects;
}