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8209573: [TESTBUG] gc/epsilon/TestMemoryMXBeans should retry on failure

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Reviewed-by: kvn, pliden
This commit is contained in:
Aleksey Shipilev 2018-08-20 10:04:00 +02:00
parent 65f4c7dee4
commit 6ccb60937c
1 changed files with 26 additions and 17 deletions

43
test/hotspot/jtreg/gc/epsilon/TestMemoryMXBeans.java

@ -67,28 +67,37 @@ public class TestMemoryMXBeans {
}
}
public static void testAllocs() {
public static void testAllocs() throws Exception {
MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean();
// Do lazy inits first:
long heapUsed1 = memoryMXBean.getHeapMemoryUsage().getUsed();
sink = new int[1024*1024];
long heapUsed2 = memoryMXBean.getHeapMemoryUsage().getUsed();
// Try multiple times, to capture either APIs we call allocate lazily, or the background threads allocating
int maxTries = 10;
int tries = 0;
// Compute how much we waste during the calls themselves:
heapUsed1 = memoryMXBean.getHeapMemoryUsage().getUsed();
heapUsed2 = memoryMXBean.getHeapMemoryUsage().getUsed();
long adj = heapUsed2 - heapUsed1;
while (true) {
// Compute how much we waste during the calls themselves:
long heapUsed1 = memoryMXBean.getHeapMemoryUsage().getUsed();
long heapUsed2 = memoryMXBean.getHeapMemoryUsage().getUsed();
long adj = heapUsed2 - heapUsed1;
heapUsed1 = memoryMXBean.getHeapMemoryUsage().getUsed();
sink = new int[1024*1024];
heapUsed2 = memoryMXBean.getHeapMemoryUsage().getUsed();
heapUsed1 = memoryMXBean.getHeapMemoryUsage().getUsed();
sink = new int[1024*1024];
heapUsed2 = memoryMXBean.getHeapMemoryUsage().getUsed();
long diff = heapUsed2 - heapUsed1 - adj;
long min = 8 + 4*1024*1024;
long max = 16 + 4*1024*1024;
if (!(min <= diff && diff <= max)) {
throw new IllegalStateException("Allocation did not change used space right: " + diff + " should be in [" + min + ", " + max + "]");
long diff = heapUsed2 - heapUsed1 - adj;
long min = 8 + 4*1024*1024;
long max = 16 + 4*1024*1024;
if ((min <= diff && diff <= max)) {
// Success
return;
}
if (tries++ > maxTries) {
throw new IllegalStateException("Allocation did not change used space right: " + diff + " should be in [" + min + ", " + max + "]");
}
// Wait and try again
Thread.sleep(1000);
}
}