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src/hotspot/cpu/ppc/globals_ppc.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().


  61 define_pd_global(intx,  InlineFrequencyCount,  100);
  62 define_pd_global(intx,  InlineSmallCode,       1500);
  63 
  64 // Flags for template interpreter.
  65 define_pd_global(bool, RewriteBytecodes,      true);
  66 define_pd_global(bool, RewriteFrequentPairs,  true);
  67 
  68 define_pd_global(bool, PreserveFramePointer,  false);
  69 
  70 // GC Ergo Flags
  71 define_pd_global(size_t, CMSYoungGenPerWorker, 16*M);  // Default max size of CMS young gen, per GC worker thread.
  72 
  73 define_pd_global(uintx, TypeProfileLevel, 111);
  74 
  75 define_pd_global(bool, CompactStrings, true);
  76 
  77 // 2x unrolled loop is shorter with more than 9 HeapWords.
  78 define_pd_global(intx, InitArrayShortSize, 9*BytesPerLong);
  79 
  80 define_pd_global(bool, ThreadLocalHandshakes, true);



  81 
  82 // Platform dependent flag handling: flags only defined on this platform.
  83 #define ARCH_FLAGS(develop,      \
  84                    product,      \
  85                    diagnostic,   \
  86                    experimental, \
  87                    notproduct,   \
  88                    range,        \
  89                    constraint,   \
  90                    writeable)    \
  91                                                                             \
  92   product(uintx, PowerArchitecturePPC64, 0,                                 \
  93           "CPU Version: x for PowerX. Currently recognizes Power5 to "      \
  94           "Power8. Default is 0. Newer CPUs will be recognized as Power8.") \
  95                                                                             \
  96   product(bool, SuperwordUseVSX, false,                                     \
  97           "Use Power8 VSX instructions for superword optimization.")        \
  98                                                                             \
  99   /* Reoptimize code-sequences of calls at runtime, e.g. replace an */      \
 100   /* indirect call by a direct call.                                */      \




  61 define_pd_global(intx,  InlineFrequencyCount,  100);
  62 define_pd_global(intx,  InlineSmallCode,       1500);
  63 
  64 // Flags for template interpreter.
  65 define_pd_global(bool, RewriteBytecodes,      true);
  66 define_pd_global(bool, RewriteFrequentPairs,  true);
  67 
  68 define_pd_global(bool, PreserveFramePointer,  false);
  69 
  70 // GC Ergo Flags
  71 define_pd_global(size_t, CMSYoungGenPerWorker, 16*M);  // Default max size of CMS young gen, per GC worker thread.
  72 
  73 define_pd_global(uintx, TypeProfileLevel, 111);
  74 
  75 define_pd_global(bool, CompactStrings, true);
  76 
  77 // 2x unrolled loop is shorter with more than 9 HeapWords.
  78 define_pd_global(intx, InitArrayShortSize, 9*BytesPerLong);
  79 
  80 define_pd_global(bool, ThreadLocalHandshakes, true);
  81 // ObjectMonitor ref_count not implemented in C2 fast_lock() or
  82 // fast_unlock() so use a handshake for safety.
  83 define_pd_global(bool, HandshakeAfterDeflateIdleMonitors, true);
  84 
  85 // Platform dependent flag handling: flags only defined on this platform.
  86 #define ARCH_FLAGS(develop,      \
  87                    product,      \
  88                    diagnostic,   \
  89                    experimental, \
  90                    notproduct,   \
  91                    range,        \
  92                    constraint,   \
  93                    writeable)    \
  94                                                                             \
  95   product(uintx, PowerArchitecturePPC64, 0,                                 \
  96           "CPU Version: x for PowerX. Currently recognizes Power5 to "      \
  97           "Power8. Default is 0. Newer CPUs will be recognized as Power8.") \
  98                                                                             \
  99   product(bool, SuperwordUseVSX, false,                                     \
 100           "Use Power8 VSX instructions for superword optimization.")        \
 101                                                                             \
 102   /* Reoptimize code-sequences of calls at runtime, e.g. replace an */      \
 103   /* indirect call by a direct call.                                */      \
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