src/hotspot/cpu/x86/globals_x86.hpp

rev 57232 : v2.00 -> v2.08 (CR8/v2.08/11-for-jdk14) patches combined into one; merge with jdk-14+25 snapshot; merge with jdk-14+26 snapshot.

*** 89,101 ****
--- 89,112 ----
  
  define_pd_global(intx, InitArrayShortSize, 8*BytesPerLong);
  
  #if defined(_LP64) || defined(_WINDOWS)
  define_pd_global(bool, ThreadLocalHandshakes, true);
+ // ObjectMonitor ref_count is implemented in LP64 C2 fast_lock()
+ // and fast_unlock() so we don't need the handshake by default.
+ #ifdef _LP64
+ define_pd_global(bool, HandshakeAfterDeflateIdleMonitors, false);
+ #else
+ define_pd_global(bool, HandshakeAfterDeflateIdleMonitors, true);
+ #endif
  #else
  // get_thread() is slow on linux 32 bit, therefore off by default
  define_pd_global(bool, ThreadLocalHandshakes, false);
+ // ObjectMonitor ref_count not implemented in C2 fast_lock() or
+ // fast_unlock() so use a handshake for safety.
+ // Will use a safepoint instead of a handshake on this platform.
+ define_pd_global(bool, HandshakeAfterDeflateIdleMonitors, true);
  #endif
  
  #define ARCH_FLAGS(develop, \
                     product, \
                     diagnostic, \