hotspot/src/share/vm/gc/parallel/psGenerationCounters.cpp
author tschatzl
Thu, 28 Jan 2016 13:30:12 +0100
changeset 35877 a2a62511d0f8
parent 30764 fec48bf5a827
permissions -rw-r--r--
8146987: Improve Parallel GC Full GC by caching results of live_words_in_range() Summary: A large part of time in the parallel scavenge collector is spent finding out the amount of live words within memory ranges to find out where to move an object to. Try to incrementally calculate this value. Reviewed-by: tschatzl, mgerdin, jmasa Contributed-by: ray alex <sky1young@gmail.com>


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#include "precompiled.hpp"
#include "gc/parallel/psGenerationCounters.hpp"
#include "memory/resourceArea.hpp"


PSGenerationCounters::PSGenerationCounters(const char* name,
                                       int ordinal, int spaces,
                                       size_t min_capacity,
                                       size_t max_capacity,
                                       PSVirtualSpace* v):
    _ps_virtual_space(v) {

  if (UsePerfData) {

    EXCEPTION_MARK;
    ResourceMark rm;

    const char* cns = PerfDataManager::name_space("generation", ordinal);

    _name_space = NEW_C_HEAP_ARRAY(char, strlen(cns)+1, mtGC);
    strcpy(_name_space, cns);

    const char* cname = PerfDataManager::counter_name(_name_space, "name");
    PerfDataManager::create_string_constant(SUN_GC, cname, name, CHECK);

    cname = PerfDataManager::counter_name(_name_space, "spaces");
    PerfDataManager::create_constant(SUN_GC, cname, PerfData::U_None,
                                     spaces, CHECK);

    cname = PerfDataManager::counter_name(_name_space, "minCapacity");
    PerfDataManager::create_constant(SUN_GC, cname, PerfData::U_Bytes,
      min_capacity, CHECK);

    cname = PerfDataManager::counter_name(_name_space, "maxCapacity");
    PerfDataManager::create_constant(SUN_GC, cname, PerfData::U_Bytes,
      max_capacity, CHECK);

    cname = PerfDataManager::counter_name(_name_space, "capacity");
    _current_size = PerfDataManager::create_variable(SUN_GC, cname,
       PerfData::U_Bytes, _ps_virtual_space->committed_size(), CHECK);
  }
}