--- a/src/hotspot/share/gc/g1/concurrentG1RefineThread.cpp Mon Nov 06 09:41:54 2017 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,174 +0,0 @@
-/*
- * Copyright (c) 2001, 2017, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- *
- */
-
-#include "precompiled.hpp"
-#include "gc/g1/concurrentG1Refine.hpp"
-#include "gc/g1/concurrentG1RefineThread.hpp"
-#include "gc/g1/g1CollectedHeap.inline.hpp"
-#include "gc/g1/g1RemSet.hpp"
-#include "gc/shared/suspendibleThreadSet.hpp"
-#include "logging/log.hpp"
-#include "memory/resourceArea.hpp"
-#include "runtime/handles.inline.hpp"
-#include "runtime/mutexLocker.hpp"
-
-ConcurrentG1RefineThread::
-ConcurrentG1RefineThread(ConcurrentG1Refine* cg1r, ConcurrentG1RefineThread *next,
- uint worker_id_offset, uint worker_id,
- size_t activate, size_t deactivate) :
- ConcurrentGCThread(),
- _worker_id_offset(worker_id_offset),
- _worker_id(worker_id),
- _active(false),
- _next(next),
- _monitor(NULL),
- _cg1r(cg1r),
- _vtime_accum(0.0),
- _activation_threshold(activate),
- _deactivation_threshold(deactivate)
-{
-
- // Each thread has its own monitor. The i-th thread is responsible for signaling
- // to thread i+1 if the number of buffers in the queue exceeds a threshold for this
- // thread. Monitors are also used to wake up the threads during termination.
- // The 0th (primary) worker is notified by mutator threads and has a special monitor.
- if (!is_primary()) {
- _monitor = new Monitor(Mutex::nonleaf, "Refinement monitor", true,
- Monitor::_safepoint_check_never);
- } else {
- _monitor = DirtyCardQ_CBL_mon;
- }
-
- // set name
- set_name("G1 Refine#%d", worker_id);
- create_and_start();
-}
-
-void ConcurrentG1RefineThread::update_thresholds(size_t activate,
- size_t deactivate) {
- assert(deactivate < activate, "precondition");
- _activation_threshold = activate;
- _deactivation_threshold = deactivate;
-}
-
-void ConcurrentG1RefineThread::wait_for_completed_buffers() {
- MutexLockerEx x(_monitor, Mutex::_no_safepoint_check_flag);
- while (!should_terminate() && !is_active()) {
- _monitor->wait(Mutex::_no_safepoint_check_flag);
- }
-}
-
-bool ConcurrentG1RefineThread::is_active() {
- DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set();
- return is_primary() ? dcqs.process_completed_buffers() : _active;
-}
-
-void ConcurrentG1RefineThread::activate() {
- MutexLockerEx x(_monitor, Mutex::_no_safepoint_check_flag);
- if (!is_primary()) {
- set_active(true);
- } else {
- DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set();
- dcqs.set_process_completed(true);
- }
- _monitor->notify();
-}
-
-void ConcurrentG1RefineThread::deactivate() {
- MutexLockerEx x(_monitor, Mutex::_no_safepoint_check_flag);
- if (!is_primary()) {
- set_active(false);
- } else {
- DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set();
- dcqs.set_process_completed(false);
- }
-}
-
-void ConcurrentG1RefineThread::run_service() {
- _vtime_start = os::elapsedVTime();
-
- while (!should_terminate()) {
- // Wait for work
- wait_for_completed_buffers();
- if (should_terminate()) {
- break;
- }
-
- size_t buffers_processed = 0;
- DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set();
- log_debug(gc, refine)("Activated %d, on threshold: " SIZE_FORMAT ", current: " SIZE_FORMAT,
- _worker_id, _activation_threshold, dcqs.completed_buffers_num());
-
- {
- SuspendibleThreadSetJoiner sts_join;
-
- while (!should_terminate()) {
- if (sts_join.should_yield()) {
- sts_join.yield();
- continue; // Re-check for termination after yield delay.
- }
-
- size_t curr_buffer_num = dcqs.completed_buffers_num();
- // If the number of the buffers falls down into the yellow zone,
- // that means that the transition period after the evacuation pause has ended.
- if (dcqs.completed_queue_padding() > 0 && curr_buffer_num <= cg1r()->yellow_zone()) {
- dcqs.set_completed_queue_padding(0);
- }
-
- // Check if we need to activate the next thread.
- if ((_next != NULL) &&
- !_next->is_active() &&
- (curr_buffer_num > _next->_activation_threshold)) {
- _next->activate();
- }
-
- // Process the next buffer, if there are enough left.
- if (!dcqs.refine_completed_buffer_concurrently(_worker_id + _worker_id_offset, _deactivation_threshold)) {
- break; // Deactivate, number of buffers fell below threshold.
- }
- ++buffers_processed;
- }
- }
-
- deactivate();
- log_debug(gc, refine)("Deactivated %d, off threshold: " SIZE_FORMAT
- ", current: " SIZE_FORMAT ", processed: " SIZE_FORMAT,
- _worker_id, _deactivation_threshold,
- dcqs.completed_buffers_num(),
- buffers_processed);
-
- if (os::supports_vtime()) {
- _vtime_accum = (os::elapsedVTime() - _vtime_start);
- } else {
- _vtime_accum = 0.0;
- }
- }
-
- log_debug(gc, refine)("Stopping %d", _worker_id);
-}
-
-void ConcurrentG1RefineThread::stop_service() {
- MutexLockerEx x(_monitor, Mutex::_no_safepoint_check_flag);
- _monitor->notify();
-}