changeset 18929:063c1b9097af

8012241: NMT huge memory footprint, it usually leads to OOME Summary: Enforce memory limitation on NMT to prevent JVM OOM Reviewed-by: acorn, dcubed, minqi
author zgu
date Thu, 11 Jul 2013 13:15:12 -0400
parents d87d5b908025
children f20c05d2fdda
files hotspot/src/share/vm/services/memTracker.cpp
diffstat 1 files changed, 6 insertions(+), 0 deletions(-) [+]
line wrap: on
line diff
--- a/hotspot/src/share/vm/services/memTracker.cpp	Mon Jul 08 18:26:26 2013 -0700
+++ b/hotspot/src/share/vm/services/memTracker.cpp	Thu Jul 11 13:15:12 2013 -0400
@@ -385,6 +385,7 @@
 #define SAFE_SEQUENCE_THRESHOLD    30
 #define HIGH_GENERATION_THRESHOLD  60
 #define MAX_RECORDER_THREAD_RATIO  30
+#define MAX_RECORDER_PER_THREAD    100
 
 void MemTracker::sync() {
   assert(_tracking_level > NMT_off, "NMT is not enabled");
@@ -437,6 +438,11 @@
         // means that worker thread is lagging behind in processing them.
         if (!AutoShutdownNMT) {
           _slowdown_calling_thread = (MemRecorder::_instance_count > MAX_RECORDER_THREAD_RATIO * _thread_count);
+        } else {
+          // If auto shutdown is on, enforce MAX_RECORDER_PER_THREAD threshold to prevent OOM
+          if (MemRecorder::_instance_count >= _thread_count * MAX_RECORDER_PER_THREAD) {
+            shutdown(NMT_out_of_memory);
+          }
         }
 
         // check _worker_thread with lock to avoid racing condition