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src/hotspot/cpu/s390/globals_s390.hpp

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rev 56639 : loosen a couple more counter checks due to races observed in testing; simplify om_release() extraction of mid since list head or cur_mid_in_use is marked; simplify deflate_monitor_list() extraction of mid since there are no parallel deleters due to the safepoint; simplify deflate_monitor_list_using_JT() extraction of mid since list head or cur_mid_in_use is marked; prepend_block_to_lists() - simplify based on David H's comments; does not need load_acquire() or release_store() because of the cmpxchg(); prepend_to_common() - simplify to use mark_next_loop() for m and use mark_list_head() and release_store() for the non-empty list case; add more debugging for "Non-balanced monitor enter/exit" failure mode; fix race in inflate() in the "CASE: neutral" code path; install_displaced_markword_in_object() does not need to clear the header field since that is handled when the ObjectMonitor is moved from the global free list; LSuccess should clear boxReg to set ICC.ZF=1 to avoid depending on existing boxReg contents; update fast_unlock() to detect when object no longer refers to the same ObjectMonitor and take fast path exit instead; clarify fast_lock() code where we detect when object no longer refers to the same ObjectMonitor; add/update comments for movptr() calls where we move a literal into an Address; remove set_owner(); refactor setting of owner field into set_owner_from(2 versions), set_owner_from_BasicLock(), and try_set_owner_from(); the new functions include monitorinflation+owner logging; extract debug code from v2.06 and v2.07 and move to v2.07.debug; change 'jccb' -> 'jcc' and 'jmpb' -> 'jmp' as needed; checkpoint initial version of MacroAssembler::inc_om_ref_count(); update LP64 MacroAssembler::fast_lock() and fast_unlock() to use inc_om_ref_count(); fast_lock() return flag setting logic can use 'testptr(tmpReg, tmpReg)' instead of 'cmpptr(tmpReg, 0)' since that's more efficient; fast_unlock() LSuccess return flag setting logic can use 'testl (boxReg, 0)' instead of 'xorptr(boxReg, boxReg)' since that's more efficient; cleanup "fast-path" vs "fast path" and "slow-path" vs "slow path"; update MacroAssembler::rtm_inflated_locking() to use inc_om_ref_count(); update MacroAssembler::fast_lock() to preserve the flags before decrementing ref_count and restore the flags afterwards; this is more clean than depending on the contents of rax/tmpReg; coleenp CR - refactor async monitor deflation work from ServiceThread::service_thread_entry() to ObjectSynchronizer::deflate_idle_monitors_using_JT(); rehn,eosterlund CR - add support for HandshakeAfterDeflateIdleMonitors for platforms that don't have ObjectMonitor ref_count support implemented in C2 fast_lock() and fast_unlock().


  63 define_pd_global(intx,  StackRedPages,               DEFAULT_STACK_RED_PAGES);
  64 define_pd_global(intx,  StackShadowPages,            DEFAULT_STACK_SHADOW_PAGES);
  65 define_pd_global(intx,  StackReservedPages,          DEFAULT_STACK_RESERVED_PAGES);
  66 
  67 define_pd_global(bool, RewriteBytecodes,     true);
  68 define_pd_global(bool, RewriteFrequentPairs, true);
  69 
  70 define_pd_global(bool, PreserveFramePointer, false);
  71 
  72 // GC Ergo Flags
  73 define_pd_global(size_t, CMSYoungGenPerWorker, 16*M);  // Default max size of CMS young gen, per GC worker thread.
  74 
  75 define_pd_global(uintx, TypeProfileLevel, 111);
  76 
  77 define_pd_global(bool, CompactStrings, true);
  78 
  79 // 8146801 (Short Array Allocation): No performance work done here yet.
  80 define_pd_global(intx, InitArrayShortSize, 1*BytesPerLong);
  81 
  82 define_pd_global(bool, ThreadLocalHandshakes, true);



  83 
  84 #define ARCH_FLAGS(develop,      \
  85                    product,      \
  86                    diagnostic,   \
  87                    experimental, \
  88                    notproduct,   \
  89                    range,        \
  90                    constraint,   \
  91                    writeable)    \
  92                                                                               \
  93   /* Reoptimize code-sequences of calls at runtime, e.g. replace an */        \
  94   /* indirect call by a direct call.                                */        \
  95   product(bool, ReoptimizeCallSequences, true,                                \
  96           "Reoptimize code-sequences of calls at runtime.")                   \
  97                                                                               \
  98   product(bool, UseByteReverseInstruction, true,                              \
  99           "Use byte reverse instruction.")                                    \
 100                                                                               \
 101   product(bool, ExpandLoadingBaseDecode, true, "Expand the assembler "        \
 102           "instruction required to load the base from DecodeN nodes during "  \




  63 define_pd_global(intx,  StackRedPages,               DEFAULT_STACK_RED_PAGES);
  64 define_pd_global(intx,  StackShadowPages,            DEFAULT_STACK_SHADOW_PAGES);
  65 define_pd_global(intx,  StackReservedPages,          DEFAULT_STACK_RESERVED_PAGES);
  66 
  67 define_pd_global(bool, RewriteBytecodes,     true);
  68 define_pd_global(bool, RewriteFrequentPairs, true);
  69 
  70 define_pd_global(bool, PreserveFramePointer, false);
  71 
  72 // GC Ergo Flags
  73 define_pd_global(size_t, CMSYoungGenPerWorker, 16*M);  // Default max size of CMS young gen, per GC worker thread.
  74 
  75 define_pd_global(uintx, TypeProfileLevel, 111);
  76 
  77 define_pd_global(bool, CompactStrings, true);
  78 
  79 // 8146801 (Short Array Allocation): No performance work done here yet.
  80 define_pd_global(intx, InitArrayShortSize, 1*BytesPerLong);
  81 
  82 define_pd_global(bool, ThreadLocalHandshakes, true);
  83 // ObjectMonitor ref_count not implemented in C2 fast_lock() or
  84 // fast_unlock() so use a handshake for safety.
  85 define_pd_global(bool, HandshakeAfterDeflateIdleMonitors, true);
  86 
  87 #define ARCH_FLAGS(develop,      \
  88                    product,      \
  89                    diagnostic,   \
  90                    experimental, \
  91                    notproduct,   \
  92                    range,        \
  93                    constraint,   \
  94                    writeable)    \
  95                                                                               \
  96   /* Reoptimize code-sequences of calls at runtime, e.g. replace an */        \
  97   /* indirect call by a direct call.                                */        \
  98   product(bool, ReoptimizeCallSequences, true,                                \
  99           "Reoptimize code-sequences of calls at runtime.")                   \
 100                                                                               \
 101   product(bool, UseByteReverseInstruction, true,                              \
 102           "Use byte reverse instruction.")                                    \
 103                                                                               \
 104   product(bool, ExpandLoadingBaseDecode, true, "Expand the assembler "        \
 105           "instruction required to load the base from DecodeN nodes during "  \


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