1526 // Perversely, the heap size -- and thus the STW safepoint rate --

  1526 // Perversely, the heap size -- and thus the STW safepoint rate --

  1527 // typically drives the scavenge rate.  Large heaps can mean infrequent GC,

  1527 // typically drives the scavenge rate.  Large heaps can mean infrequent GC,

  1528 // which in turn can mean large(r) numbers of objectmonitors in circulation.

  1528 // which in turn can mean large(r) numbers of objectmonitors in circulation.

  1529 // This is an unfortunate aspect of this design.

  1529 // This is an unfortunate aspect of this design.

  1530 

  1530 

  1535 // Deflate a single monitor if not in-use

  1531 // Deflate a single monitor if not in-use

  1536 // Return true if deflated, false if in-use

  1532 // Return true if deflated, false if in-use

  1537 bool ObjectSynchronizer::deflate_monitor(ObjectMonitor* mid, oop obj,

  1533 bool ObjectSynchronizer::deflate_monitor(ObjectMonitor* mid, oop obj,

  1538                                          ObjectMonitor** freeHeadp,

  1534                                          ObjectMonitor** freeHeadp,

  1539                                          ObjectMonitor** freeTailp) {

  1535                                          ObjectMonitor** freeTailp) {

  1542   guarantee(obj->mark() == markOopDesc::encode(mid), "invariant");

  1538   guarantee(obj->mark() == markOopDesc::encode(mid), "invariant");

  1543   guarantee(mid == obj->mark()->monitor(), "invariant");

  1539   guarantee(mid == obj->mark()->monitor(), "invariant");

  1544   guarantee(mid->header()->is_neutral(), "invariant");

  1540   guarantee(mid->header()->is_neutral(), "invariant");

  1545 

  1541 

  1546   if (mid->is_busy()) {

  1542   if (mid->is_busy()) {

  1548     deflated = false;

  1543     deflated = false;

  1549   } else {

  1544   } else {

  1550     // Deflate the monitor if it is no longer being used

  1545     // Deflate the monitor if it is no longer being used

  1551     // It's idle - scavenge and return to the global free list

  1546     // It's idle - scavenge and return to the global free list

  1552     // plain old deflation ...

  1547     // plain old deflation ...