hotspot/src/share/vm/gc/g1/workerDataArray.inline.hpp
author tschatzl
Wed, 14 Jun 2017 11:26:44 +0200
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8178148: Log more detailed information about scan rs phase Summary: Add logging about the number of cards actually scanned, claimed and skipped during the Scan RS phase Reviewed-by: ehelin, sangheki
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/*
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 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#ifndef SHARE_VM_GC_G1_WORKERDATAARRAY_INLINE_HPP
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#define SHARE_VM_GC_G1_WORKERDATAARRAY_INLINE_HPP
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#include "gc/g1/workerDataArray.hpp"
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#include "memory/allocation.inline.hpp"
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#include "utilities/ostream.hpp"
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template <typename T>
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WorkerDataArray<T>::WorkerDataArray(uint length, const char* title) :
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 _title(title),
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 _length(0) {
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  assert(length > 0, "Must have some workers to store data for");
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  _length = length;
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  _data = NEW_C_HEAP_ARRAY(T, _length, mtGC);
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  for (uint i = 0; i < MaxThreadWorkItems; i++) {
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    _thread_work_items[i] = NULL;
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  }
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  reset();
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}
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template <typename T>
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void WorkerDataArray<T>::set(uint worker_i, T value) {
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  assert(worker_i < _length, "Worker %d is greater than max: %d", worker_i, _length);
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  assert(_data[worker_i] == uninitialized(), "Overwriting data for worker %d in %s", worker_i, _title);
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  _data[worker_i] = value;
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}
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template <typename T>
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T WorkerDataArray<T>::get(uint worker_i) const {
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  assert(worker_i < _length, "Worker %d is greater than max: %d", worker_i, _length);
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  return _data[worker_i];
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}
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template <typename T>
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WorkerDataArray<T>::~WorkerDataArray() {
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  FREE_C_HEAP_ARRAY(T, _data);
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}
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template <typename T>
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void WorkerDataArray<T>::link_thread_work_items(WorkerDataArray<size_t>* thread_work_items, uint index) {
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  assert(index < MaxThreadWorkItems, "Tried to access thread work item %u (max %u)", index, MaxThreadWorkItems);
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  _thread_work_items[index] = thread_work_items;
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}
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template <typename T>
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void WorkerDataArray<T>::set_thread_work_item(uint worker_i, size_t value, uint index) {
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  assert(index < MaxThreadWorkItems, "Tried to access thread work item %u (max %u)", index, MaxThreadWorkItems);
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  assert(_thread_work_items[index] != NULL, "No sub count");
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  _thread_work_items[index]->set(worker_i, value);
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}
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template <typename T>
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void WorkerDataArray<T>::add_thread_work_item(uint worker_i, size_t value, uint index) {
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  assert(index < MaxThreadWorkItems, "Tried to access thread work item %u (max %u)", index, MaxThreadWorkItems);
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  assert(_thread_work_items[index] != NULL, "No sub count");
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  _thread_work_items[index]->add(worker_i, value);
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}
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template <typename T>
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void WorkerDataArray<T>::add(uint worker_i, T value) {
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  assert(worker_i < _length, "Worker %d is greater than max: %d", worker_i, _length);
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  assert(_data[worker_i] != uninitialized(), "No data to add to for worker %d", worker_i);
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  _data[worker_i] += value;
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}
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template <typename T>
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double WorkerDataArray<T>::average() const {
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  uint contributing_threads = 0;
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  for (uint i = 0; i < _length; ++i) {
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    if (get(i) != uninitialized()) {
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      contributing_threads++;
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    }
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  }
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  if (contributing_threads == 0) {
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    return 0.0;
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  }
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  return sum() / (double) contributing_threads;
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}
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template <typename T>
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T WorkerDataArray<T>::sum() const {
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  T s = 0;
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  for (uint i = 0; i < _length; ++i) {
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    if (get(i) != uninitialized()) {
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      s += get(i);
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    }
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  }
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  return s;
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}
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template <typename T>
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void WorkerDataArray<T>::set_all(T value) {
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  for (uint i = 0; i < _length; i++) {
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    _data[i] = value;
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  }
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}
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template <class T>
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void WorkerDataArray<T>::print_summary_on(outputStream* out, bool print_sum) const {
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  out->print("%-25s", title());
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  uint start = 0;
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  while (start < _length && get(start) == uninitialized()) {
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    start++;
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  }
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  if (start < _length) {
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    T min = get(start);
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    T max = min;
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    T sum = 0;
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    uint contributing_threads = 0;
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    for (uint i = start; i < _length; ++i) {
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      T value = get(i);
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      if (value != uninitialized()) {
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        max = MAX2(max, value);
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        min = MIN2(min, value);
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        sum += value;
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        contributing_threads++;
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      }
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    }
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    T diff = max - min;
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    assert(contributing_threads != 0, "Must be since we found a used value for the start index");
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    double avg = sum / (double) contributing_threads;
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    WDAPrinter::summary(out, min, avg, max, diff, sum, print_sum);
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    out->print_cr(", Workers: %d", contributing_threads);
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  } else {
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    // No data for this phase.
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    out->print_cr(" skipped");
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  }
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}
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template <class T>
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void WorkerDataArray<T>::print_details_on(outputStream* out) const {
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  WDAPrinter::details(this, out);
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}
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template <typename T>
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void WorkerDataArray<T>::reset() {
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  set_all(uninitialized());
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  for (uint i = 0; i < MaxThreadWorkItems; i++) {
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    if (_thread_work_items[i] != NULL) {
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      _thread_work_items[i]->reset();
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    }
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  }
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}
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#endif // SHARE_VM_GC_G1_WORKERDATAARRAY_INLINE_HPP