aoqi@0: /*
aoqi@0:  * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_GSPACECOUNTERS_HPP
aoqi@0: #define SHARE_VM_GC_IMPLEMENTATION_SHARED_GSPACECOUNTERS_HPP
aoqi@0: 
aoqi@0: #include "utilities/macros.hpp"
aoqi@0: #if INCLUDE_ALL_GCS
aoqi@0: #include "gc_implementation/shared/generationCounters.hpp"
aoqi@0: #include "memory/generation.hpp"
aoqi@0: #include "runtime/perfData.hpp"
aoqi@0: #endif // INCLUDE_ALL_GCS
aoqi@0: 
aoqi@0: // A GSpaceCounter is a holder class for performance counters
aoqi@0: // that track a space;
aoqi@0: 
aoqi@0: class GSpaceCounters: public CHeapObj<mtGC> {
aoqi@0:   friend class VMStructs;
aoqi@0: 
aoqi@0:  private:
aoqi@0:   PerfVariable*      _capacity;
aoqi@0:   PerfVariable*      _used;
aoqi@0: 
aoqi@0:   // Constant PerfData types don't need to retain a reference.
aoqi@0:   // However, it's a good idea to document them here.
aoqi@0:   // PerfConstant*     _size;
aoqi@0: 
aoqi@0:   Generation*       _gen;
aoqi@0:   char*             _name_space;
aoqi@0: 
aoqi@0:  public:
aoqi@0: 
aoqi@0:   GSpaceCounters(const char* name, int ordinal, size_t max_size, Generation* g,
aoqi@0:                  GenerationCounters* gc, bool sampled=true);
aoqi@0: 
aoqi@0:   ~GSpaceCounters() {
aoqi@0:     if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space, mtGC);
aoqi@0:   }
aoqi@0: 
aoqi@0:   inline void update_capacity() {
aoqi@0:     _capacity->set_value(_gen->capacity());
aoqi@0:   }
aoqi@0: 
aoqi@0:   inline void update_used() {
aoqi@0:     _used->set_value(_gen->used());
aoqi@0:   }
aoqi@0: 
aoqi@0:   // special version of update_used() to allow the used value to be
aoqi@0:   // passed as a parameter. This method can can be used in cases were
aoqi@0:   // the  utilization is already known and/or when the _gen->used()
aoqi@0:   // method is known to be expensive and we want to avoid unnecessary
aoqi@0:   // calls to it.
aoqi@0:   //
aoqi@0:   inline void update_used(size_t used) {
aoqi@0:     _used->set_value(used);
aoqi@0:   }
aoqi@0: 
aoqi@0:   inline void inc_used(size_t size) {
aoqi@0:     _used->inc(size);
aoqi@0:   }
aoqi@0: 
aoqi@0:   debug_only(
aoqi@0:     // for security reasons, we do not allow arbitrary reads from
aoqi@0:     // the counters as they may live in shared memory.
aoqi@0:     jlong used() {
aoqi@0:       return _used->get_value();
aoqi@0:     }
aoqi@0:     jlong capacity() {
aoqi@0:       return _used->get_value();
aoqi@0:     }
aoqi@0:   )
aoqi@0: 
aoqi@0:   inline void update_all() {
aoqi@0:     update_used();
aoqi@0:     update_capacity();
aoqi@0:   }
aoqi@0: 
aoqi@0:   const char* name_space() const        { return _name_space; }
aoqi@0: };
aoqi@0: 
aoqi@0: class GenerationUsedHelper : public PerfLongSampleHelper {
aoqi@0:   private:
aoqi@0:     Generation* _gen;
aoqi@0: 
aoqi@0:   public:
aoqi@0:     GenerationUsedHelper(Generation* g) : _gen(g) { }
aoqi@0: 
aoqi@0:     inline jlong take_sample() {
aoqi@0:       return _gen->used();
aoqi@0:     }
aoqi@0: };
aoqi@0: 
aoqi@0: #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_GSPACECOUNTERS_HPP