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src/share/vm/gc/shared/threadLocalAllocBuffer.hpp

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rev 8362 : 8079792: GC directory structure cleanup
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   1 /*
   2  * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_MEMORY_THREADLOCALALLOCBUFFER_HPP
  26 #define SHARE_VM_MEMORY_THREADLOCALALLOCBUFFER_HPP
  27 
  28 #include "gc_implementation/shared/gcUtil.hpp"
  29 #include "oops/typeArrayOop.hpp"
  30 #include "runtime/perfData.hpp"
  31 #include "runtime/vm_version.hpp"
  32 
  33 class GlobalTLABStats;
  34 
  35 // ThreadLocalAllocBuffer: a descriptor for thread-local storage used by
  36 // the threads for allocation.
  37 //            It is thread-private at any time, but maybe multiplexed over
  38 //            time across multiple threads. The park()/unpark() pair is
  39 //            used to make it available for such multiplexing.
  40 class ThreadLocalAllocBuffer: public CHeapObj<mtThread> {
  41   friend class VMStructs;
  42 private:
  43   HeapWord* _start;                              // address of TLAB
  44   HeapWord* _top;                                // address after last allocation
  45   HeapWord* _pf_top;                             // allocation prefetch watermark
  46   HeapWord* _end;                                // allocation end (excluding alignment_reserve)
  47   size_t    _desired_size;                       // desired size   (including alignment_reserve)
  48   size_t    _refill_waste_limit;                 // hold onto tlab if free() is larger than this


 243     _total_allocation += value;
 244   }
 245   void update_gc_waste(size_t value) {
 246     _total_gc_waste += value;
 247     _max_gc_waste    = MAX2(_max_gc_waste, value);
 248   }
 249   void update_fast_refill_waste(size_t value) {
 250     _total_fast_refill_waste += value;
 251     _max_fast_refill_waste    = MAX2(_max_fast_refill_waste, value);
 252   }
 253   void update_slow_refill_waste(size_t value) {
 254     _total_slow_refill_waste += value;
 255     _max_slow_refill_waste    = MAX2(_max_slow_refill_waste, value);
 256   }
 257   void update_slow_allocations(unsigned value) {
 258     _total_slow_allocations += value;
 259     _max_slow_allocations    = MAX2(_max_slow_allocations, value);
 260   }
 261 };
 262 
 263 #endif // SHARE_VM_MEMORY_THREADLOCALALLOCBUFFER_HPP
   1 /*
   2  * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_GC_SHARED_THREADLOCALALLOCBUFFER_HPP
  26 #define SHARE_VM_GC_SHARED_THREADLOCALALLOCBUFFER_HPP
  27 
  28 #include "gc/shared/gcUtil.hpp"
  29 #include "oops/typeArrayOop.hpp"
  30 #include "runtime/perfData.hpp"
  31 #include "runtime/vm_version.hpp"
  32 
  33 class GlobalTLABStats;
  34 
  35 // ThreadLocalAllocBuffer: a descriptor for thread-local storage used by
  36 // the threads for allocation.
  37 //            It is thread-private at any time, but maybe multiplexed over
  38 //            time across multiple threads. The park()/unpark() pair is
  39 //            used to make it available for such multiplexing.
  40 class ThreadLocalAllocBuffer: public CHeapObj<mtThread> {
  41   friend class VMStructs;
  42 private:
  43   HeapWord* _start;                              // address of TLAB
  44   HeapWord* _top;                                // address after last allocation
  45   HeapWord* _pf_top;                             // allocation prefetch watermark
  46   HeapWord* _end;                                // allocation end (excluding alignment_reserve)
  47   size_t    _desired_size;                       // desired size   (including alignment_reserve)
  48   size_t    _refill_waste_limit;                 // hold onto tlab if free() is larger than this


 243     _total_allocation += value;
 244   }
 245   void update_gc_waste(size_t value) {
 246     _total_gc_waste += value;
 247     _max_gc_waste    = MAX2(_max_gc_waste, value);
 248   }
 249   void update_fast_refill_waste(size_t value) {
 250     _total_fast_refill_waste += value;
 251     _max_fast_refill_waste    = MAX2(_max_fast_refill_waste, value);
 252   }
 253   void update_slow_refill_waste(size_t value) {
 254     _total_slow_refill_waste += value;
 255     _max_slow_refill_waste    = MAX2(_max_slow_refill_waste, value);
 256   }
 257   void update_slow_allocations(unsigned value) {
 258     _total_slow_allocations += value;
 259     _max_slow_allocations    = MAX2(_max_slow_allocations, value);
 260   }
 261 };
 262 
 263 #endif // SHARE_VM_GC_SHARED_THREADLOCALALLOCBUFFER_HPP
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