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8270435: UT: MonitorUsedDeflationThresholdTest failed: did not find too_many string in output #6543

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8270435: UT: MonitorUsedDeflationThresholdTest failed: did not find too_many string in output #6543

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12 changes: 10 additions & 2 deletions test/hotspot/jtreg/runtime/Monitor/MonitorUsedDeflationThresholdTest.java
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Expand Up @@ -81,6 +81,11 @@ public static void main(String[] args) throws Exception {
// of monitors for threads that call Object.wait().
"-XX:+UnlockDiagnosticVMOptions",
"-XX:AvgMonitorsPerThreadEstimate=1",
// MonitorUsedDeflationThreshold == 10 means we'll request
// deflations when 10% of monitors are used rather than the
// default 90%. This should allow the test to tolerate a burst
// of used monitors by threads not under this test's control.
"-XX:MonitorUsedDeflationThreshold=10",
// Enable monitorinflation logging so we can see that
// MonitorUsedDeflationThreshold and
// NoAsyncDeflationProgressMaxoption are working.
Expand All @@ -89,8 +94,9 @@ public static void main(String[] args) throws Exception {
"-Xlog:safepoint+cleanup=info",
"-Xlog:safepoint+stats=debug",
// Run the test with inflate_count == 33 since that
// reproduced the bug with JDK13. Anything above the
// in_use_list_ceiling will do the trick.
// reproduced the bug with JDK13. With inflate_count == 33, an
// initial ceiling == 12 and MonitorUsedDeflationThreshold == 10,
// we should hit NoAsyncDeflationProgressMax at least 3 times.
"MonitorUsedDeflationThresholdTest", "33");

OutputAnalyzer output_detail = new OutputAnalyzer(pb.start());
Expand All @@ -111,6 +117,8 @@ public static void main(String[] args) throws Exception {
throw new RuntimeException("Did not find too_many string in output.\n");
}
System.out.println("too_many='" + too_many + "'");
// Uncomment the following line for dumping test output in passing runs:
// output_detail.reportDiagnosticSummary();

System.out.println("PASSED.");
return;
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