private static void verifyCodeHeapNotExists(ProcessBuilder pb, String... heapNames)
throws Exception {
OutputAnalyzer out = new OutputAnalyzer(pb.start());
out.shouldHaveExitValue(0);
for (String name : heapNames) {
out.shouldNotContain(name);
}
}
private static void verifySegmentedCodeCache(ProcessBuilder pb, boolean enabled)
throws Exception {
OutputAnalyzer out = new OutputAnalyzer(pb.start());
out.shouldHaveExitValue(0);
if (enabled) {
try {
// Non-nmethod code heap should be always available with the segmented code cache
out.shouldContain(NON_METHOD);
} catch (RuntimeException e) {
// Check if TieredCompilation is disabled (in a client VM)
if (!out.getOutput().contains("-XX:+TieredCompilation not supported in this VM")) {
// Code cache is not segmented
throw new RuntimeException("No code cache segmentation.");
}
}
} else {
out.shouldNotContain(NON_METHOD);
}
}
public static void main(String args[]) throws Exception {
is_64_bit_system = (Platform.is64bit());
OutputAnalyzer output;
whiteBox = WhiteBox.getWhiteBox();
// Grab my own PID
String pid = Long.toString(ProcessTools.getProcessId());
ProcessBuilder pb = new ProcessBuilder();
AllocThread[] alloc_threads = new AllocThread[256];
ReleaseThread[] release_threads = new ReleaseThread[64];
int index;
// Create many allocation threads
for (index = 0; index < alloc_threads.length; index++) {
alloc_threads[index] = new AllocThread();
}
// Fewer release threads
for (index = 0; index < release_threads.length; index++) {
release_threads[index] = new ReleaseThread();
}
if (is_64_bit_system()) {
sleep_wait(2 * 60 * 1000);
} else {
sleep_wait(60 * 1000);
}
// pause the stress test
phase = TestPhase.pause;
while (pause_count.intValue() < alloc_threads.length + release_threads.length) {
sleep_wait(10);
}
long mallocd_total_in_KB = (mallocd_total + K / 2) / K;
// Now check if the result from NMT matches the total memory allocated.
String expected_test_summary =
"Test (reserved=" + mallocd_total_in_KB + "KB, committed=" + mallocd_total_in_KB + "KB)";
// Run 'jcmd <pid> VM.native_memory summary'
pb.command(new String[] {JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary"});
output = new OutputAnalyzer(pb.start());
output.shouldContain(expected_test_summary);
// Release all allocated memory
phase = TestPhase.release;
synchronized (mallocd_memory) {
mallocd_memory.notifyAll();
}
// Join all threads
for (index = 0; index < alloc_threads.length; index++) {
try {
alloc_threads[index].join();
} catch (InterruptedException e) {
}
}
for (index = 0; index < release_threads.length; index++) {
try {
release_threads[index].join();
} catch (InterruptedException e) {
}
}
// All test memory allocated should be released
output = new OutputAnalyzer(pb.start());
output.shouldNotContain("Test (reserved=");
// Verify that tracking level has not been downgraded
pb.command(
new String[] {JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "statistics"});
output = new OutputAnalyzer(pb.start());
output.shouldNotContain("Tracking level has been downgraded due to lack of resources");
}