| /* |
| * Copyright (c) 2013, 2014 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_implementation/g1/g1CollectedHeap.inline.hpp" |
| #include "gc_implementation/g1/g1GCPhaseTimes.hpp" |
| #include "gc_implementation/g1/g1Log.hpp" |
| #include "gc_implementation/g1/g1StringDedup.hpp" |
| |
| // Helper class for avoiding interleaved logging |
| class LineBuffer: public StackObj { |
| |
| private: |
| static const int BUFFER_LEN = 1024; |
| static const int INDENT_CHARS = 3; |
| char _buffer[BUFFER_LEN]; |
| int _indent_level; |
| int _cur; |
| |
| void vappend(const char* format, va_list ap) ATTRIBUTE_PRINTF(2, 0) { |
| int res = vsnprintf(&_buffer[_cur], BUFFER_LEN - _cur, format, ap); |
| if (res != -1) { |
| _cur += res; |
| } else { |
| DEBUG_ONLY(warning("buffer too small in LineBuffer");) |
| _buffer[BUFFER_LEN -1] = 0; |
| _cur = BUFFER_LEN; // vsnprintf above should not add to _buffer if we are called again |
| } |
| } |
| |
| public: |
| explicit LineBuffer(int indent_level): _indent_level(indent_level), _cur(0) { |
| for (; (_cur < BUFFER_LEN && _cur < (_indent_level * INDENT_CHARS)); _cur++) { |
| _buffer[_cur] = ' '; |
| } |
| } |
| |
| #ifndef PRODUCT |
| ~LineBuffer() { |
| assert(_cur == _indent_level * INDENT_CHARS, "pending data in buffer - append_and_print_cr() not called?"); |
| } |
| #endif |
| |
| void append(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) { |
| va_list ap; |
| va_start(ap, format); |
| vappend(format, ap); |
| va_end(ap); |
| } |
| |
| void append_and_print_cr(const char* format, ...) ATTRIBUTE_PRINTF(2, 3) { |
| va_list ap; |
| va_start(ap, format); |
| vappend(format, ap); |
| va_end(ap); |
| gclog_or_tty->print_cr("%s", _buffer); |
| _cur = _indent_level * INDENT_CHARS; |
| } |
| }; |
| |
| PRAGMA_DIAG_PUSH |
| PRAGMA_FORMAT_NONLITERAL_IGNORED |
| template <class T> |
| void WorkerDataArray<T>::print(int level, const char* title) { |
| if (_length == 1) { |
| // No need for min, max, average and sum for only one worker |
| LineBuffer buf(level); |
| buf.append("[%s: ", title); |
| buf.append(_print_format, _data[0]); |
| buf.append_and_print_cr("]"); |
| return; |
| } |
| |
| T min = _data[0]; |
| T max = _data[0]; |
| T sum = 0; |
| |
| LineBuffer buf(level); |
| buf.append("[%s:", title); |
| for (uint i = 0; i < _length; ++i) { |
| T val = _data[i]; |
| min = MIN2(val, min); |
| max = MAX2(val, max); |
| sum += val; |
| if (G1Log::finest()) { |
| buf.append(" "); |
| buf.append(_print_format, val); |
| } |
| } |
| |
| if (G1Log::finest()) { |
| buf.append_and_print_cr("%s", ""); |
| } |
| |
| double avg = (double)sum / (double)_length; |
| buf.append(" Min: "); |
| buf.append(_print_format, min); |
| buf.append(", Avg: "); |
| buf.append("%.1lf", avg); // Always print average as a double |
| buf.append(", Max: "); |
| buf.append(_print_format, max); |
| buf.append(", Diff: "); |
| buf.append(_print_format, max - min); |
| if (_print_sum) { |
| // for things like the start and end times the sum is not |
| // that relevant |
| buf.append(", Sum: "); |
| buf.append(_print_format, sum); |
| } |
| buf.append_and_print_cr("]"); |
| } |
| PRAGMA_DIAG_POP |
| |
| #ifndef PRODUCT |
| |
| template <> const int WorkerDataArray<int>::_uninitialized = -1; |
| template <> const double WorkerDataArray<double>::_uninitialized = -1.0; |
| template <> const size_t WorkerDataArray<size_t>::_uninitialized = (size_t)-1; |
| |
| template <class T> |
| void WorkerDataArray<T>::reset() { |
| for (uint i = 0; i < _length; i++) { |
| _data[i] = (T)_uninitialized; |
| } |
| } |
| |
| template <class T> |
| void WorkerDataArray<T>::verify() { |
| for (uint i = 0; i < _length; i++) { |
| assert(_data[i] != _uninitialized, |
| err_msg("Invalid data for worker " UINT32_FORMAT ", data: %lf, uninitialized: %lf", |
| i, (double)_data[i], (double)_uninitialized)); |
| } |
| } |
| |
| #endif |
| |
| G1GCPhaseTimes::G1GCPhaseTimes(uint max_gc_threads) : |
| _max_gc_threads(max_gc_threads), |
| _last_gc_worker_start_times_ms(_max_gc_threads, "%.1lf", false), |
| _last_ext_root_scan_times_ms(_max_gc_threads, "%.1lf"), |
| _last_satb_filtering_times_ms(_max_gc_threads, "%.1lf"), |
| _last_update_rs_times_ms(_max_gc_threads, "%.1lf"), |
| _last_update_rs_processed_buffers(_max_gc_threads, "%d"), |
| _last_scan_rs_times_ms(_max_gc_threads, "%.1lf"), |
| _last_strong_code_root_scan_times_ms(_max_gc_threads, "%.1lf"), |
| _last_obj_copy_times_ms(_max_gc_threads, "%.1lf"), |
| _last_termination_times_ms(_max_gc_threads, "%.1lf"), |
| _last_termination_attempts(_max_gc_threads, SIZE_FORMAT), |
| _last_gc_worker_end_times_ms(_max_gc_threads, "%.1lf", false), |
| _last_gc_worker_times_ms(_max_gc_threads, "%.1lf"), |
| _last_gc_worker_other_times_ms(_max_gc_threads, "%.1lf"), |
| _last_redirty_logged_cards_time_ms(_max_gc_threads, "%.1lf"), |
| _last_redirty_logged_cards_processed_cards(_max_gc_threads, SIZE_FORMAT), |
| _cur_string_dedup_queue_fixup_worker_times_ms(_max_gc_threads, "%.1lf"), |
| _cur_string_dedup_table_fixup_worker_times_ms(_max_gc_threads, "%.1lf") |
| { |
| assert(max_gc_threads > 0, "Must have some GC threads"); |
| } |
| |
| void G1GCPhaseTimes::note_gc_start(uint active_gc_threads) { |
| assert(active_gc_threads > 0, "The number of threads must be > 0"); |
| assert(active_gc_threads <= _max_gc_threads, "The number of active threads must be <= the max nubmer of threads"); |
| _active_gc_threads = active_gc_threads; |
| |
| _last_gc_worker_start_times_ms.reset(); |
| _last_ext_root_scan_times_ms.reset(); |
| _last_satb_filtering_times_ms.reset(); |
| _last_update_rs_times_ms.reset(); |
| _last_update_rs_processed_buffers.reset(); |
| _last_scan_rs_times_ms.reset(); |
| _last_strong_code_root_scan_times_ms.reset(); |
| _last_obj_copy_times_ms.reset(); |
| _last_termination_times_ms.reset(); |
| _last_termination_attempts.reset(); |
| _last_gc_worker_end_times_ms.reset(); |
| _last_gc_worker_times_ms.reset(); |
| _last_gc_worker_other_times_ms.reset(); |
| |
| _last_redirty_logged_cards_time_ms.reset(); |
| _last_redirty_logged_cards_processed_cards.reset(); |
| |
| } |
| |
| void G1GCPhaseTimes::note_gc_end() { |
| _last_gc_worker_start_times_ms.verify(); |
| _last_ext_root_scan_times_ms.verify(); |
| _last_satb_filtering_times_ms.verify(); |
| _last_update_rs_times_ms.verify(); |
| _last_update_rs_processed_buffers.verify(); |
| _last_scan_rs_times_ms.verify(); |
| _last_strong_code_root_scan_times_ms.verify(); |
| _last_obj_copy_times_ms.verify(); |
| _last_termination_times_ms.verify(); |
| _last_termination_attempts.verify(); |
| _last_gc_worker_end_times_ms.verify(); |
| |
| for (uint i = 0; i < _active_gc_threads; i++) { |
| double worker_time = _last_gc_worker_end_times_ms.get(i) - _last_gc_worker_start_times_ms.get(i); |
| _last_gc_worker_times_ms.set(i, worker_time); |
| |
| double worker_known_time = _last_ext_root_scan_times_ms.get(i) + |
| _last_satb_filtering_times_ms.get(i) + |
| _last_update_rs_times_ms.get(i) + |
| _last_scan_rs_times_ms.get(i) + |
| _last_strong_code_root_scan_times_ms.get(i) + |
| _last_obj_copy_times_ms.get(i) + |
| _last_termination_times_ms.get(i); |
| |
| double worker_other_time = worker_time - worker_known_time; |
| _last_gc_worker_other_times_ms.set(i, worker_other_time); |
| } |
| |
| _last_gc_worker_times_ms.verify(); |
| _last_gc_worker_other_times_ms.verify(); |
| |
| _last_redirty_logged_cards_time_ms.verify(); |
| _last_redirty_logged_cards_processed_cards.verify(); |
| } |
| |
| void G1GCPhaseTimes::note_string_dedup_fixup_start() { |
| _cur_string_dedup_queue_fixup_worker_times_ms.reset(); |
| _cur_string_dedup_table_fixup_worker_times_ms.reset(); |
| } |
| |
| void G1GCPhaseTimes::note_string_dedup_fixup_end() { |
| _cur_string_dedup_queue_fixup_worker_times_ms.verify(); |
| _cur_string_dedup_table_fixup_worker_times_ms.verify(); |
| } |
| |
| void G1GCPhaseTimes::print_stats(int level, const char* str, double value) { |
| LineBuffer(level).append_and_print_cr("[%s: %.1lf ms]", str, value); |
| } |
| |
| void G1GCPhaseTimes::print_stats(int level, const char* str, size_t value) { |
| LineBuffer(level).append_and_print_cr("[%s: "SIZE_FORMAT"]", str, value); |
| } |
| |
| void G1GCPhaseTimes::print_stats(int level, const char* str, double value, uint workers) { |
| LineBuffer(level).append_and_print_cr("[%s: %.1lf ms, GC Workers: " UINT32_FORMAT "]", str, value, workers); |
| } |
| |
| double G1GCPhaseTimes::accounted_time_ms() { |
| // Subtract the root region scanning wait time. It's initialized to |
| // zero at the start of the pause. |
| double misc_time_ms = _root_region_scan_wait_time_ms; |
| |
| misc_time_ms += _cur_collection_par_time_ms; |
| |
| // Now subtract the time taken to fix up roots in generated code |
| misc_time_ms += _cur_collection_code_root_fixup_time_ms; |
| |
| // Strong code root purge time |
| misc_time_ms += _cur_strong_code_root_purge_time_ms; |
| |
| if (G1StringDedup::is_enabled()) { |
| // String dedup fixup time |
| misc_time_ms += _cur_string_dedup_fixup_time_ms; |
| } |
| |
| // Subtract the time taken to clean the card table from the |
| // current value of "other time" |
| misc_time_ms += _cur_clear_ct_time_ms; |
| |
| return misc_time_ms; |
| } |
| |
| void G1GCPhaseTimes::print(double pause_time_sec) { |
| if (_root_region_scan_wait_time_ms > 0.0) { |
| print_stats(1, "Root Region Scan Waiting", _root_region_scan_wait_time_ms); |
| } |
| if (G1CollectedHeap::use_parallel_gc_threads()) { |
| print_stats(1, "Parallel Time", _cur_collection_par_time_ms, _active_gc_threads); |
| _last_gc_worker_start_times_ms.print(2, "GC Worker Start (ms)"); |
| _last_ext_root_scan_times_ms.print(2, "Ext Root Scanning (ms)"); |
| if (_last_satb_filtering_times_ms.sum() > 0.0) { |
| _last_satb_filtering_times_ms.print(2, "SATB Filtering (ms)"); |
| } |
| _last_update_rs_times_ms.print(2, "Update RS (ms)"); |
| _last_update_rs_processed_buffers.print(3, "Processed Buffers"); |
| _last_scan_rs_times_ms.print(2, "Scan RS (ms)"); |
| _last_strong_code_root_scan_times_ms.print(2, "Code Root Scanning (ms)"); |
| _last_obj_copy_times_ms.print(2, "Object Copy (ms)"); |
| _last_termination_times_ms.print(2, "Termination (ms)"); |
| if (G1Log::finest()) { |
| _last_termination_attempts.print(3, "Termination Attempts"); |
| } |
| _last_gc_worker_other_times_ms.print(2, "GC Worker Other (ms)"); |
| _last_gc_worker_times_ms.print(2, "GC Worker Total (ms)"); |
| _last_gc_worker_end_times_ms.print(2, "GC Worker End (ms)"); |
| } else { |
| _last_ext_root_scan_times_ms.print(1, "Ext Root Scanning (ms)"); |
| if (_last_satb_filtering_times_ms.sum() > 0.0) { |
| _last_satb_filtering_times_ms.print(1, "SATB Filtering (ms)"); |
| } |
| _last_update_rs_times_ms.print(1, "Update RS (ms)"); |
| _last_update_rs_processed_buffers.print(2, "Processed Buffers"); |
| _last_scan_rs_times_ms.print(1, "Scan RS (ms)"); |
| _last_strong_code_root_scan_times_ms.print(1, "Code Root Scanning (ms)"); |
| _last_obj_copy_times_ms.print(1, "Object Copy (ms)"); |
| } |
| print_stats(1, "Code Root Fixup", _cur_collection_code_root_fixup_time_ms); |
| print_stats(1, "Code Root Purge", _cur_strong_code_root_purge_time_ms); |
| if (G1StringDedup::is_enabled()) { |
| print_stats(1, "String Dedup Fixup", _cur_string_dedup_fixup_time_ms, _active_gc_threads); |
| _cur_string_dedup_queue_fixup_worker_times_ms.print(2, "Queue Fixup (ms)"); |
| _cur_string_dedup_table_fixup_worker_times_ms.print(2, "Table Fixup (ms)"); |
| } |
| print_stats(1, "Clear CT", _cur_clear_ct_time_ms); |
| double misc_time_ms = pause_time_sec * MILLIUNITS - accounted_time_ms(); |
| print_stats(1, "Other", misc_time_ms); |
| if (_cur_verify_before_time_ms > 0.0) { |
| print_stats(2, "Verify Before", _cur_verify_before_time_ms); |
| } |
| if (G1CollectedHeap::heap()->evacuation_failed()) { |
| double evac_fail_handling = _cur_evac_fail_recalc_used + _cur_evac_fail_remove_self_forwards + |
| _cur_evac_fail_restore_remsets; |
| print_stats(2, "Evacuation Failure", evac_fail_handling); |
| if (G1Log::finest()) { |
| print_stats(3, "Recalculate Used", _cur_evac_fail_recalc_used); |
| print_stats(3, "Remove Self Forwards", _cur_evac_fail_remove_self_forwards); |
| print_stats(3, "Restore RemSet", _cur_evac_fail_restore_remsets); |
| } |
| } |
| print_stats(2, "Choose CSet", |
| (_recorded_young_cset_choice_time_ms + |
| _recorded_non_young_cset_choice_time_ms)); |
| print_stats(2, "Ref Proc", _cur_ref_proc_time_ms); |
| print_stats(2, "Ref Enq", _cur_ref_enq_time_ms); |
| print_stats(2, "Redirty Cards", _recorded_redirty_logged_cards_time_ms); |
| if (G1Log::finest()) { |
| _last_redirty_logged_cards_time_ms.print(3, "Parallel Redirty"); |
| _last_redirty_logged_cards_processed_cards.print(3, "Redirtied Cards"); |
| } |
| if (G1ReclaimDeadHumongousObjectsAtYoungGC) { |
| print_stats(2, "Humongous Reclaim", _cur_fast_reclaim_humongous_time_ms); |
| if (G1Log::finest()) { |
| print_stats(3, "Humongous Total", _cur_fast_reclaim_humongous_total); |
| print_stats(3, "Humongous Candidate", _cur_fast_reclaim_humongous_candidates); |
| print_stats(3, "Humongous Reclaimed", _cur_fast_reclaim_humongous_reclaimed); |
| } |
| } |
| print_stats(2, "Free CSet", |
| (_recorded_young_free_cset_time_ms + |
| _recorded_non_young_free_cset_time_ms)); |
| if (G1Log::finest()) { |
| print_stats(3, "Young Free CSet", _recorded_young_free_cset_time_ms); |
| print_stats(3, "Non-Young Free CSet", _recorded_non_young_free_cset_time_ms); |
| } |
| if (_cur_verify_after_time_ms > 0.0) { |
| print_stats(2, "Verify After", _cur_verify_after_time_ms); |
| } |
| } |