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src/hotspot/cpu/sparc/globalDefinitions_sparc.hpp

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rev 56048 : Add OM_CACHE_LINE_SIZE so that ObjectMonitor cache line sizes can be experimented with independently of DEFAULT_CACHE_LINE_SIZE; for SPARC and X64 configs that use 128 for DEFAULT_CACHE_LINE_SIZE, we are experimenting with 64; move _previous_owner_tid and _allocation_state fields to share the cache line with ObjectMonitor::_header; put ObjectMonitor::_ref_count on its own cache line after _owner; add 'int* count_p' parameter to deflate_monitor_list() and deflate_monitor_list_using_JT() and push counter updates down to where the ObjectMonitors are actually removed from the in-use lists; monitors_iterate() async deflation check should use negative ref_count; add 'JavaThread* target' param to deflate_per_thread_idle_monitors_using_JT() add deflate_common_idle_monitors_using_JT() to make it clear which JavaThread* is the target of the work and which is the calling JavaThread* (self); g_free_list, g_om_in_use_list and g_om_in_use_count are now static to synchronizer.cpp (reduce scope); add more diagnostic info to some assert()'s; minor code cleanups and code motion; save_om_ptr() should detect a race with a deflating thread that is bailing out and cause a retry when the ref_count field is not positive; merge with jdk-14+11; add special GC support for TestHumongousClassLoader.java; merge with 8230184.patch.


  23  */
  24 
  25 #ifndef CPU_SPARC_GLOBALDEFINITIONS_SPARC_HPP
  26 #define CPU_SPARC_GLOBALDEFINITIONS_SPARC_HPP
  27 
  28 // Size of Sparc Instructions
  29 const int BytesPerInstWord = 4;
  30 
  31 const int StackAlignmentInBytes = (2*wordSize);
  32 
  33 // Indicates whether the C calling conventions require that
  34 // 32-bit integer argument values are extended to 64 bits.
  35 const bool CCallingConventionRequiresIntsAsLongs = true;
  36 
  37 #define SUPPORTS_NATIVE_CX8
  38 
  39 // The expected size in bytes of a cache line, used to pad data structures.
  40 #if defined(TIERED)
  41   // tiered, 64-bit, large machine
  42   #define DEFAULT_CACHE_LINE_SIZE 128

  43 #elif defined(COMPILER1)
  44   // pure C1, 32-bit, small machine
  45   #define DEFAULT_CACHE_LINE_SIZE 16
  46 #elif defined(COMPILER2)
  47   // pure C2, 64-bit, large machine
  48   #define DEFAULT_CACHE_LINE_SIZE 128

  49 #endif
  50 
  51 #if defined(SOLARIS)
  52 #define SUPPORT_RESERVED_STACK_AREA
  53 #endif
  54 
  55 // SPARC have implemented the local polling
  56 #define THREAD_LOCAL_POLL
  57 
  58 #endif // CPU_SPARC_GLOBALDEFINITIONS_SPARC_HPP



  23  */
  24 
  25 #ifndef CPU_SPARC_GLOBALDEFINITIONS_SPARC_HPP
  26 #define CPU_SPARC_GLOBALDEFINITIONS_SPARC_HPP
  27 
  28 // Size of Sparc Instructions
  29 const int BytesPerInstWord = 4;
  30 
  31 const int StackAlignmentInBytes = (2*wordSize);
  32 
  33 // Indicates whether the C calling conventions require that
  34 // 32-bit integer argument values are extended to 64 bits.
  35 const bool CCallingConventionRequiresIntsAsLongs = true;
  36 
  37 #define SUPPORTS_NATIVE_CX8
  38 
  39 // The expected size in bytes of a cache line, used to pad data structures.
  40 #if defined(TIERED)
  41   // tiered, 64-bit, large machine
  42   #define DEFAULT_CACHE_LINE_SIZE 128
  43   #define OM_CACHE_LINE_SIZE 64
  44 #elif defined(COMPILER1)
  45   // pure C1, 32-bit, small machine
  46   #define DEFAULT_CACHE_LINE_SIZE 16
  47 #elif defined(COMPILER2)
  48   // pure C2, 64-bit, large machine
  49   #define DEFAULT_CACHE_LINE_SIZE 128
  50   #define OM_CACHE_LINE_SIZE 64
  51 #endif
  52 
  53 #if defined(SOLARIS)
  54 #define SUPPORT_RESERVED_STACK_AREA
  55 #endif
  56 
  57 // SPARC have implemented the local polling
  58 #define THREAD_LOCAL_POLL
  59 
  60 #endif // CPU_SPARC_GLOBALDEFINITIONS_SPARC_HPP
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