infernap12/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2026-02-23 08:45:33 +00:00
Code Issues Packages Projects Releases Wiki Activity

8012241: NMT huge memory footprint, it usually leads to OOME

Browse Source 
Enforce memory limitation on NMT to prevent JVM OOM

Reviewed-by: acorn, dcubed, minqi
This commit is contained in:
Zhengyu Gu 2013-07-11 13:15:12 -04:00
parent 64cf70de03
commit 9ff3405151
1 changed files with 6 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
hotspot/src/share/vm/services/memTracker.cpp
View File

@ -385,6 +385,7 @@ void MemTracker::enqueue_pending_recorder(MemRecorder* rec) {
#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 @@ void MemTracker::sync() {
// 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