--- old/src/hotspot/share/gc/g1/concurrentG1Refine.cpp 2017-11-03 14:44:18.991389435 +0100 +++ /dev/null 2017-10-30 10:02:53.732784560 +0100 @@ -1,370 +0,0 @@ -/* - * Copyright (c) 2001, 2016, 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/g1YoungRemSetSamplingThread.hpp" -#include "logging/log.hpp" -#include "runtime/java.hpp" -#include "runtime/thread.hpp" -#include "utilities/debug.hpp" -#include "utilities/globalDefinitions.hpp" -#include "utilities/pair.hpp" -#include - -// Arbitrary but large limits, to simplify some of the zone calculations. -// The general idea is to allow expressions like -// MIN2(x OP y, max_XXX_zone) -// without needing to check for overflow in "x OP y", because the -// ranges for x and y have been restricted. -STATIC_ASSERT(sizeof(LP64_ONLY(jint) NOT_LP64(jshort)) <= (sizeof(size_t)/2)); -const size_t max_yellow_zone = LP64_ONLY(max_jint) NOT_LP64(max_jshort); -const size_t max_green_zone = max_yellow_zone / 2; -const size_t max_red_zone = INT_MAX; // For dcqs.set_max_completed_queue. -STATIC_ASSERT(max_yellow_zone <= max_red_zone); - -// Range check assertions for green zone values. -#define assert_zone_constraints_g(green) \ - do { \ - size_t azc_g_green = (green); \ - assert(azc_g_green <= max_green_zone, \ - "green exceeds max: " SIZE_FORMAT, azc_g_green); \ - } while (0) - -// Range check assertions for green and yellow zone values. -#define assert_zone_constraints_gy(green, yellow) \ - do { \ - size_t azc_gy_green = (green); \ - size_t azc_gy_yellow = (yellow); \ - assert_zone_constraints_g(azc_gy_green); \ - assert(azc_gy_yellow <= max_yellow_zone, \ - "yellow exceeds max: " SIZE_FORMAT, azc_gy_yellow); \ - assert(azc_gy_green <= azc_gy_yellow, \ - "green (" SIZE_FORMAT ") exceeds yellow (" SIZE_FORMAT ")", \ - azc_gy_green, azc_gy_yellow); \ - } while (0) - -// Range check assertions for green, yellow, and red zone values. -#define assert_zone_constraints_gyr(green, yellow, red) \ - do { \ - size_t azc_gyr_green = (green); \ - size_t azc_gyr_yellow = (yellow); \ - size_t azc_gyr_red = (red); \ - assert_zone_constraints_gy(azc_gyr_green, azc_gyr_yellow); \ - assert(azc_gyr_red <= max_red_zone, \ - "red exceeds max: " SIZE_FORMAT, azc_gyr_red); \ - assert(azc_gyr_yellow <= azc_gyr_red, \ - "yellow (" SIZE_FORMAT ") exceeds red (" SIZE_FORMAT ")", \ - azc_gyr_yellow, azc_gyr_red); \ - } while (0) - -// Logging tag sequence for refinement control updates. -#define CTRL_TAGS gc, ergo, refine - -// For logging zone values, ensuring consistency of level and tags. -#define LOG_ZONES(...) log_debug( CTRL_TAGS )(__VA_ARGS__) - -// Package for pair of refinement thread activation and deactivation -// thresholds. The activation and deactivation levels are resp. the first -// and second values of the pair. -typedef Pair Thresholds; -inline size_t activation_level(const Thresholds& t) { return t.first; } -inline size_t deactivation_level(const Thresholds& t) { return t.second; } - -static Thresholds calc_thresholds(size_t green_zone, - size_t yellow_zone, - uint worker_i) { - double yellow_size = yellow_zone - green_zone; - double step = yellow_size / ConcurrentG1Refine::thread_num(); - if (worker_i == 0) { - // Potentially activate worker 0 more aggressively, to keep - // available buffers near green_zone value. When yellow_size is - // large we don't want to allow a full step to accumulate before - // doing any processing, as that might lead to significantly more - // than green_zone buffers to be processed by update_rs. - step = MIN2(step, ParallelGCThreads / 2.0); - } - size_t activate_offset = static_cast(ceil(step * (worker_i + 1))); - size_t deactivate_offset = static_cast(floor(step * worker_i)); - return Thresholds(green_zone + activate_offset, - green_zone + deactivate_offset); -} - -ConcurrentG1Refine::ConcurrentG1Refine(size_t green_zone, - size_t yellow_zone, - size_t red_zone, - size_t min_yellow_zone_size) : - _threads(NULL), - _sample_thread(NULL), - _n_worker_threads(thread_num()), - _green_zone(green_zone), - _yellow_zone(yellow_zone), - _red_zone(red_zone), - _min_yellow_zone_size(min_yellow_zone_size) -{ - assert_zone_constraints_gyr(green_zone, yellow_zone, red_zone); -} - -static size_t calc_min_yellow_zone_size() { - size_t step = G1ConcRefinementThresholdStep; - uint n_workers = ConcurrentG1Refine::thread_num(); - if ((max_yellow_zone / step) < n_workers) { - return max_yellow_zone; - } else { - return step * n_workers; - } -} - -static size_t calc_init_green_zone() { - size_t green = G1ConcRefinementGreenZone; - if (FLAG_IS_DEFAULT(G1ConcRefinementGreenZone)) { - green = ParallelGCThreads; - } - return MIN2(green, max_green_zone); -} - -static size_t calc_init_yellow_zone(size_t green, size_t min_size) { - size_t config = G1ConcRefinementYellowZone; - size_t size = 0; - if (FLAG_IS_DEFAULT(G1ConcRefinementYellowZone)) { - size = green * 2; - } else if (green < config) { - size = config - green; - } - size = MAX2(size, min_size); - size = MIN2(size, max_yellow_zone); - return MIN2(green + size, max_yellow_zone); -} - -static size_t calc_init_red_zone(size_t green, size_t yellow) { - size_t size = yellow - green; - if (!FLAG_IS_DEFAULT(G1ConcRefinementRedZone)) { - size_t config = G1ConcRefinementRedZone; - if (yellow < config) { - size = MAX2(size, config - yellow); - } - } - return MIN2(yellow + size, max_red_zone); -} - -ConcurrentG1Refine* ConcurrentG1Refine::create(jint* ecode) { - size_t min_yellow_zone_size = calc_min_yellow_zone_size(); - size_t green_zone = calc_init_green_zone(); - size_t yellow_zone = calc_init_yellow_zone(green_zone, min_yellow_zone_size); - size_t red_zone = calc_init_red_zone(green_zone, yellow_zone); - - LOG_ZONES("Initial Refinement Zones: " - "green: " SIZE_FORMAT ", " - "yellow: " SIZE_FORMAT ", " - "red: " SIZE_FORMAT ", " - "min yellow size: " SIZE_FORMAT, - green_zone, yellow_zone, red_zone, min_yellow_zone_size); - - ConcurrentG1Refine* cg1r = new ConcurrentG1Refine(green_zone, - yellow_zone, - red_zone, - min_yellow_zone_size); - - if (cg1r == NULL) { - *ecode = JNI_ENOMEM; - vm_shutdown_during_initialization("Could not create ConcurrentG1Refine"); - return NULL; - } - - cg1r->_threads = NEW_C_HEAP_ARRAY_RETURN_NULL(ConcurrentG1RefineThread*, cg1r->_n_worker_threads, mtGC); - if (cg1r->_threads == NULL) { - *ecode = JNI_ENOMEM; - vm_shutdown_during_initialization("Could not allocate an array for ConcurrentG1RefineThread"); - return NULL; - } - - uint worker_id_offset = DirtyCardQueueSet::num_par_ids(); - - ConcurrentG1RefineThread *next = NULL; - for (uint i = cg1r->_n_worker_threads - 1; i != UINT_MAX; i--) { - Thresholds thresholds = calc_thresholds(green_zone, yellow_zone, i); - ConcurrentG1RefineThread* t = - new ConcurrentG1RefineThread(cg1r, - next, - worker_id_offset, - i, - activation_level(thresholds), - deactivation_level(thresholds)); - assert(t != NULL, "Conc refine should have been created"); - if (t->osthread() == NULL) { - *ecode = JNI_ENOMEM; - vm_shutdown_during_initialization("Could not create ConcurrentG1RefineThread"); - return NULL; - } - - assert(t->cg1r() == cg1r, "Conc refine thread should refer to this"); - cg1r->_threads[i] = t; - next = t; - } - - cg1r->_sample_thread = new G1YoungRemSetSamplingThread(); - if (cg1r->_sample_thread->osthread() == NULL) { - *ecode = JNI_ENOMEM; - vm_shutdown_during_initialization("Could not create G1YoungRemSetSamplingThread"); - return NULL; - } - - *ecode = JNI_OK; - return cg1r; -} - -void ConcurrentG1Refine::stop() { - for (uint i = 0; i < _n_worker_threads; i++) { - _threads[i]->stop(); - } - _sample_thread->stop(); -} - -void ConcurrentG1Refine::update_thread_thresholds() { - for (uint i = 0; i < _n_worker_threads; i++) { - Thresholds thresholds = calc_thresholds(_green_zone, _yellow_zone, i); - _threads[i]->update_thresholds(activation_level(thresholds), - deactivation_level(thresholds)); - } -} - -ConcurrentG1Refine::~ConcurrentG1Refine() { - for (uint i = 0; i < _n_worker_threads; i++) { - delete _threads[i]; - } - FREE_C_HEAP_ARRAY(ConcurrentG1RefineThread*, _threads); - - delete _sample_thread; -} - -void ConcurrentG1Refine::threads_do(ThreadClosure *tc) { - worker_threads_do(tc); - tc->do_thread(_sample_thread); -} - -void ConcurrentG1Refine::worker_threads_do(ThreadClosure * tc) { - for (uint i = 0; i < _n_worker_threads; i++) { - tc->do_thread(_threads[i]); - } -} - -uint ConcurrentG1Refine::thread_num() { - return G1ConcRefinementThreads; -} - -void ConcurrentG1Refine::print_worker_threads_on(outputStream* st) const { - for (uint i = 0; i < _n_worker_threads; ++i) { - _threads[i]->print_on(st); - st->cr(); - } - _sample_thread->print_on(st); - st->cr(); -} - -static size_t calc_new_green_zone(size_t green, - double update_rs_time, - size_t update_rs_processed_buffers, - double goal_ms) { - // Adjust green zone based on whether we're meeting the time goal. - // Limit to max_green_zone. - const double inc_k = 1.1, dec_k = 0.9; - if (update_rs_time > goal_ms) { - if (green > 0) { - green = static_cast(green * dec_k); - } - } else if (update_rs_time < goal_ms && - update_rs_processed_buffers > green) { - green = static_cast(MAX2(green * inc_k, green + 1.0)); - green = MIN2(green, max_green_zone); - } - return green; -} - -static size_t calc_new_yellow_zone(size_t green, size_t min_yellow_size) { - size_t size = green * 2; - size = MAX2(size, min_yellow_size); - return MIN2(green + size, max_yellow_zone); -} - -static size_t calc_new_red_zone(size_t green, size_t yellow) { - return MIN2(yellow + (yellow - green), max_red_zone); -} - -void ConcurrentG1Refine::update_zones(double update_rs_time, - size_t update_rs_processed_buffers, - double goal_ms) { - log_trace( CTRL_TAGS )("Updating Refinement Zones: " - "update_rs time: %.3fms, " - "update_rs buffers: " SIZE_FORMAT ", " - "update_rs goal time: %.3fms", - update_rs_time, - update_rs_processed_buffers, - goal_ms); - - _green_zone = calc_new_green_zone(_green_zone, - update_rs_time, - update_rs_processed_buffers, - goal_ms); - _yellow_zone = calc_new_yellow_zone(_green_zone, _min_yellow_zone_size); - _red_zone = calc_new_red_zone(_green_zone, _yellow_zone); - - assert_zone_constraints_gyr(_green_zone, _yellow_zone, _red_zone); - LOG_ZONES("Updated Refinement Zones: " - "green: " SIZE_FORMAT ", " - "yellow: " SIZE_FORMAT ", " - "red: " SIZE_FORMAT, - _green_zone, _yellow_zone, _red_zone); -} - -void ConcurrentG1Refine::adjust(double update_rs_time, - size_t update_rs_processed_buffers, - double goal_ms) { - DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); - - if (G1UseAdaptiveConcRefinement) { - update_zones(update_rs_time, update_rs_processed_buffers, goal_ms); - update_thread_thresholds(); - - // Change the barrier params - if (_n_worker_threads == 0) { - // Disable dcqs notification when there are no threads to notify. - dcqs.set_process_completed_threshold(INT_MAX); - } else { - // Worker 0 is the primary; wakeup is via dcqs notification. - STATIC_ASSERT(max_yellow_zone <= INT_MAX); - size_t activate = _threads[0]->activation_threshold(); - dcqs.set_process_completed_threshold((int)activate); - } - dcqs.set_max_completed_queue((int)red_zone()); - } - - size_t curr_queue_size = dcqs.completed_buffers_num(); - if (curr_queue_size >= yellow_zone()) { - dcqs.set_completed_queue_padding(curr_queue_size); - } else { - dcqs.set_completed_queue_padding(0); - } - dcqs.notify_if_necessary(); -} --- /dev/null 2017-10-30 10:02:53.732784560 +0100 +++ new/src/hotspot/share/gc/g1/g1ConcurrentRefine.cpp 2017-11-03 14:44:18.545375690 +0100 @@ -0,0 +1,370 @@ +/* + * 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/g1ConcurrentRefine.hpp" +#include "gc/g1/g1ConcurrentRefineThread.hpp" +#include "gc/g1/g1YoungRemSetSamplingThread.hpp" +#include "logging/log.hpp" +#include "runtime/java.hpp" +#include "runtime/thread.hpp" +#include "utilities/debug.hpp" +#include "utilities/globalDefinitions.hpp" +#include "utilities/pair.hpp" +#include + +// Arbitrary but large limits, to simplify some of the zone calculations. +// The general idea is to allow expressions like +// MIN2(x OP y, max_XXX_zone) +// without needing to check for overflow in "x OP y", because the +// ranges for x and y have been restricted. +STATIC_ASSERT(sizeof(LP64_ONLY(jint) NOT_LP64(jshort)) <= (sizeof(size_t)/2)); +const size_t max_yellow_zone = LP64_ONLY(max_jint) NOT_LP64(max_jshort); +const size_t max_green_zone = max_yellow_zone / 2; +const size_t max_red_zone = INT_MAX; // For dcqs.set_max_completed_queue. +STATIC_ASSERT(max_yellow_zone <= max_red_zone); + +// Range check assertions for green zone values. +#define assert_zone_constraints_g(green) \ + do { \ + size_t azc_g_green = (green); \ + assert(azc_g_green <= max_green_zone, \ + "green exceeds max: " SIZE_FORMAT, azc_g_green); \ + } while (0) + +// Range check assertions for green and yellow zone values. +#define assert_zone_constraints_gy(green, yellow) \ + do { \ + size_t azc_gy_green = (green); \ + size_t azc_gy_yellow = (yellow); \ + assert_zone_constraints_g(azc_gy_green); \ + assert(azc_gy_yellow <= max_yellow_zone, \ + "yellow exceeds max: " SIZE_FORMAT, azc_gy_yellow); \ + assert(azc_gy_green <= azc_gy_yellow, \ + "green (" SIZE_FORMAT ") exceeds yellow (" SIZE_FORMAT ")", \ + azc_gy_green, azc_gy_yellow); \ + } while (0) + +// Range check assertions for green, yellow, and red zone values. +#define assert_zone_constraints_gyr(green, yellow, red) \ + do { \ + size_t azc_gyr_green = (green); \ + size_t azc_gyr_yellow = (yellow); \ + size_t azc_gyr_red = (red); \ + assert_zone_constraints_gy(azc_gyr_green, azc_gyr_yellow); \ + assert(azc_gyr_red <= max_red_zone, \ + "red exceeds max: " SIZE_FORMAT, azc_gyr_red); \ + assert(azc_gyr_yellow <= azc_gyr_red, \ + "yellow (" SIZE_FORMAT ") exceeds red (" SIZE_FORMAT ")", \ + azc_gyr_yellow, azc_gyr_red); \ + } while (0) + +// Logging tag sequence for refinement control updates. +#define CTRL_TAGS gc, ergo, refine + +// For logging zone values, ensuring consistency of level and tags. +#define LOG_ZONES(...) log_debug( CTRL_TAGS )(__VA_ARGS__) + +// Package for pair of refinement thread activation and deactivation +// thresholds. The activation and deactivation levels are resp. the first +// and second values of the pair. +typedef Pair Thresholds; +inline size_t activation_level(const Thresholds& t) { return t.first; } +inline size_t deactivation_level(const Thresholds& t) { return t.second; } + +static Thresholds calc_thresholds(size_t green_zone, + size_t yellow_zone, + uint worker_i) { + double yellow_size = yellow_zone - green_zone; + double step = yellow_size / G1ConcurrentRefine::thread_num(); + if (worker_i == 0) { + // Potentially activate worker 0 more aggressively, to keep + // available buffers near green_zone value. When yellow_size is + // large we don't want to allow a full step to accumulate before + // doing any processing, as that might lead to significantly more + // than green_zone buffers to be processed by update_rs. + step = MIN2(step, ParallelGCThreads / 2.0); + } + size_t activate_offset = static_cast(ceil(step * (worker_i + 1))); + size_t deactivate_offset = static_cast(floor(step * worker_i)); + return Thresholds(green_zone + activate_offset, + green_zone + deactivate_offset); +} + +G1ConcurrentRefine::G1ConcurrentRefine(size_t green_zone, + size_t yellow_zone, + size_t red_zone, + size_t min_yellow_zone_size) : + _threads(NULL), + _sample_thread(NULL), + _n_worker_threads(thread_num()), + _green_zone(green_zone), + _yellow_zone(yellow_zone), + _red_zone(red_zone), + _min_yellow_zone_size(min_yellow_zone_size) +{ + assert_zone_constraints_gyr(green_zone, yellow_zone, red_zone); +} + +static size_t calc_min_yellow_zone_size() { + size_t step = G1ConcRefinementThresholdStep; + uint n_workers = G1ConcurrentRefine::thread_num(); + if ((max_yellow_zone / step) < n_workers) { + return max_yellow_zone; + } else { + return step * n_workers; + } +} + +static size_t calc_init_green_zone() { + size_t green = G1ConcRefinementGreenZone; + if (FLAG_IS_DEFAULT(G1ConcRefinementGreenZone)) { + green = ParallelGCThreads; + } + return MIN2(green, max_green_zone); +} + +static size_t calc_init_yellow_zone(size_t green, size_t min_size) { + size_t config = G1ConcRefinementYellowZone; + size_t size = 0; + if (FLAG_IS_DEFAULT(G1ConcRefinementYellowZone)) { + size = green * 2; + } else if (green < config) { + size = config - green; + } + size = MAX2(size, min_size); + size = MIN2(size, max_yellow_zone); + return MIN2(green + size, max_yellow_zone); +} + +static size_t calc_init_red_zone(size_t green, size_t yellow) { + size_t size = yellow - green; + if (!FLAG_IS_DEFAULT(G1ConcRefinementRedZone)) { + size_t config = G1ConcRefinementRedZone; + if (yellow < config) { + size = MAX2(size, config - yellow); + } + } + return MIN2(yellow + size, max_red_zone); +} + +G1ConcurrentRefine* G1ConcurrentRefine::create(jint* ecode) { + size_t min_yellow_zone_size = calc_min_yellow_zone_size(); + size_t green_zone = calc_init_green_zone(); + size_t yellow_zone = calc_init_yellow_zone(green_zone, min_yellow_zone_size); + size_t red_zone = calc_init_red_zone(green_zone, yellow_zone); + + LOG_ZONES("Initial Refinement Zones: " + "green: " SIZE_FORMAT ", " + "yellow: " SIZE_FORMAT ", " + "red: " SIZE_FORMAT ", " + "min yellow size: " SIZE_FORMAT, + green_zone, yellow_zone, red_zone, min_yellow_zone_size); + + G1ConcurrentRefine* cr = new G1ConcurrentRefine(green_zone, + yellow_zone, + red_zone, + min_yellow_zone_size); + + if (cr == NULL) { + *ecode = JNI_ENOMEM; + vm_shutdown_during_initialization("Could not create G1ConcurrentRefine"); + return NULL; + } + + cr->_threads = NEW_C_HEAP_ARRAY_RETURN_NULL(G1ConcurrentRefineThread*, cr->_n_worker_threads, mtGC); + if (cr->_threads == NULL) { + *ecode = JNI_ENOMEM; + vm_shutdown_during_initialization("Could not allocate an array for G1ConcurrentRefineThread"); + return NULL; + } + + uint worker_id_offset = DirtyCardQueueSet::num_par_ids(); + + G1ConcurrentRefineThread *next = NULL; + for (uint i = cr->_n_worker_threads - 1; i != UINT_MAX; i--) { + Thresholds thresholds = calc_thresholds(green_zone, yellow_zone, i); + G1ConcurrentRefineThread* t = + new G1ConcurrentRefineThread(cr, + next, + worker_id_offset, + i, + activation_level(thresholds), + deactivation_level(thresholds)); + assert(t != NULL, "Conc refine should have been created"); + if (t->osthread() == NULL) { + *ecode = JNI_ENOMEM; + vm_shutdown_during_initialization("Could not create G1ConcurrentRefineThread"); + return NULL; + } + + assert(t->cr() == cr, "Conc refine thread should refer to this"); + cr->_threads[i] = t; + next = t; + } + + cr->_sample_thread = new G1YoungRemSetSamplingThread(); + if (cr->_sample_thread->osthread() == NULL) { + *ecode = JNI_ENOMEM; + vm_shutdown_during_initialization("Could not create G1YoungRemSetSamplingThread"); + return NULL; + } + + *ecode = JNI_OK; + return cr; +} + +void G1ConcurrentRefine::stop() { + for (uint i = 0; i < _n_worker_threads; i++) { + _threads[i]->stop(); + } + _sample_thread->stop(); +} + +void G1ConcurrentRefine::update_thread_thresholds() { + for (uint i = 0; i < _n_worker_threads; i++) { + Thresholds thresholds = calc_thresholds(_green_zone, _yellow_zone, i); + _threads[i]->update_thresholds(activation_level(thresholds), + deactivation_level(thresholds)); + } +} + +G1ConcurrentRefine::~G1ConcurrentRefine() { + for (uint i = 0; i < _n_worker_threads; i++) { + delete _threads[i]; + } + FREE_C_HEAP_ARRAY(G1ConcurrentRefineThread*, _threads); + + delete _sample_thread; +} + +void G1ConcurrentRefine::threads_do(ThreadClosure *tc) { + worker_threads_do(tc); + tc->do_thread(_sample_thread); +} + +void G1ConcurrentRefine::worker_threads_do(ThreadClosure * tc) { + for (uint i = 0; i < _n_worker_threads; i++) { + tc->do_thread(_threads[i]); + } +} + +uint G1ConcurrentRefine::thread_num() { + return G1ConcRefinementThreads; +} + +void G1ConcurrentRefine::print_worker_threads_on(outputStream* st) const { + for (uint i = 0; i < _n_worker_threads; ++i) { + _threads[i]->print_on(st); + st->cr(); + } + _sample_thread->print_on(st); + st->cr(); +} + +static size_t calc_new_green_zone(size_t green, + double update_rs_time, + size_t update_rs_processed_buffers, + double goal_ms) { + // Adjust green zone based on whether we're meeting the time goal. + // Limit to max_green_zone. + const double inc_k = 1.1, dec_k = 0.9; + if (update_rs_time > goal_ms) { + if (green > 0) { + green = static_cast(green * dec_k); + } + } else if (update_rs_time < goal_ms && + update_rs_processed_buffers > green) { + green = static_cast(MAX2(green * inc_k, green + 1.0)); + green = MIN2(green, max_green_zone); + } + return green; +} + +static size_t calc_new_yellow_zone(size_t green, size_t min_yellow_size) { + size_t size = green * 2; + size = MAX2(size, min_yellow_size); + return MIN2(green + size, max_yellow_zone); +} + +static size_t calc_new_red_zone(size_t green, size_t yellow) { + return MIN2(yellow + (yellow - green), max_red_zone); +} + +void G1ConcurrentRefine::update_zones(double update_rs_time, + size_t update_rs_processed_buffers, + double goal_ms) { + log_trace( CTRL_TAGS )("Updating Refinement Zones: " + "update_rs time: %.3fms, " + "update_rs buffers: " SIZE_FORMAT ", " + "update_rs goal time: %.3fms", + update_rs_time, + update_rs_processed_buffers, + goal_ms); + + _green_zone = calc_new_green_zone(_green_zone, + update_rs_time, + update_rs_processed_buffers, + goal_ms); + _yellow_zone = calc_new_yellow_zone(_green_zone, _min_yellow_zone_size); + _red_zone = calc_new_red_zone(_green_zone, _yellow_zone); + + assert_zone_constraints_gyr(_green_zone, _yellow_zone, _red_zone); + LOG_ZONES("Updated Refinement Zones: " + "green: " SIZE_FORMAT ", " + "yellow: " SIZE_FORMAT ", " + "red: " SIZE_FORMAT, + _green_zone, _yellow_zone, _red_zone); +} + +void G1ConcurrentRefine::adjust(double update_rs_time, + size_t update_rs_processed_buffers, + double goal_ms) { + DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); + + if (G1UseAdaptiveConcRefinement) { + update_zones(update_rs_time, update_rs_processed_buffers, goal_ms); + update_thread_thresholds(); + + // Change the barrier params + if (_n_worker_threads == 0) { + // Disable dcqs notification when there are no threads to notify. + dcqs.set_process_completed_threshold(INT_MAX); + } else { + // Worker 0 is the primary; wakeup is via dcqs notification. + STATIC_ASSERT(max_yellow_zone <= INT_MAX); + size_t activate = _threads[0]->activation_threshold(); + dcqs.set_process_completed_threshold((int)activate); + } + dcqs.set_max_completed_queue((int)red_zone()); + } + + size_t curr_queue_size = dcqs.completed_buffers_num(); + if (curr_queue_size >= yellow_zone()) { + dcqs.set_completed_queue_padding(curr_queue_size); + } else { + dcqs.set_completed_queue_padding(0); + } + dcqs.notify_if_necessary(); +}