1.1 --- a/src/share/vm/runtime/mutex.hpp Thu Jan 31 14:56:50 2008 -0500
1.2 +++ b/src/share/vm/runtime/mutex.hpp Tue Feb 05 23:21:57 2008 -0800
1.3 @@ -82,6 +82,9 @@
1.4 // *in that order*. If their implementations change such that these
1.5 // assumptions are violated, a whole lot of code will break.
1.6
1.7 +// The default length of monitor name is choosen to be 64 to avoid false sharing.
1.8 +static const int MONITOR_NAME_LEN = 64;
1.9 +
1.10 class Monitor : public CHeapObj {
1.11
1.12 public:
1.13 @@ -126,9 +129,8 @@
1.14 volatile intptr_t _WaitLock [1] ; // Protects _WaitSet
1.15 ParkEvent * volatile _WaitSet ; // LL of ParkEvents
1.16 volatile bool _snuck; // Used for sneaky locking (evil).
1.17 - const char * _name; // Name of mutex
1.18 int NotifyCount ; // diagnostic assist
1.19 - double pad [8] ; // avoid false sharing
1.20 + char _name[MONITOR_NAME_LEN]; // Name of mutex
1.21
1.22 // Debugging fields for naming, deadlock detection, etc. (some only used in debug mode)
1.23 #ifndef PRODUCT
1.24 @@ -170,7 +172,7 @@
1.25 int ILocked () ;
1.26
1.27 protected:
1.28 - static void ClearMonitor (Monitor * m) ;
1.29 + static void ClearMonitor (Monitor * m, const char* name = NULL) ;
1.30 Monitor() ;
1.31
1.32 public:
