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8166724: gc/g1/TestHumongousShrinkHeap.java fails with OOME

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Reviewed-by: dfazunen, jwilhelm
This commit is contained in:
Leonid Mesnik 2016-10-19 10:06:55 +03:00
parent 4a49bb6284
commit 3057feeecb
1 changed files with 16 additions and 10 deletions
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26
hotspot/test/gc/g1/TestHumongousShrinkHeap.java
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@ -51,23 +51,29 @@ public class TestHumongousShrinkHeap {
private static final int REGION_SIZE = 1024 * 1024; // 1M
private static final int LISTS_COUNT = 10;
private static final int HUMON_SIZE = Math.round(.9f * REGION_SIZE);
private static final long AVAILABLE_MEMORY
= Runtime.getRuntime().freeMemory();
private static final int HUMON_COUNT
= (int) ((AVAILABLE_MEMORY / HUMON_SIZE)
/ LISTS_COUNT);
private static final long TOTAL_MEMORY = Runtime.getRuntime().totalMemory();
private static final long MAX_MEMORY = Runtime.getRuntime().maxMemory();
private static final int HUMON_COUNT = (int) ((TOTAL_MEMORY / HUMON_SIZE) / LISTS_COUNT);
public static void main(String[] args) {
if (HUMON_COUNT == 0) {
System.out.println("Skipped. Heap is too small");
return;
}
System.out.format("Running with %s max heap size. "
+ "Will allocate humongous object of %s size %d times.%n",
MemoryUsagePrinter.humanReadableByteCount(AVAILABLE_MEMORY, false),
MemoryUsagePrinter.humanReadableByteCount(HUMON_SIZE, false),
HUMON_COUNT
if (TOTAL_MEMORY + REGION_SIZE * HUMON_COUNT > MAX_MEMORY) {
System.out.println("Skipped. Initial heap size is to close to max heap size.");
return;
}
System.out.format("Running with %s initial heap size of %s maximum heap size. "
+ "Will allocate humongous object of %s size %d times.%n",
MemoryUsagePrinter.humanReadableByteCount(TOTAL_MEMORY, false),
MemoryUsagePrinter.humanReadableByteCount(MAX_MEMORY, false),
MemoryUsagePrinter.humanReadableByteCount(HUMON_SIZE, false),
HUMON_COUNT
);
new TestHumongousShrinkHeap().test();
}