brutisso@3923: /*
brutisso@3923:  * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
brutisso@3923:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
brutisso@3923:  *
brutisso@3923:  * This code is free software; you can redistribute it and/or modify it
brutisso@3923:  * under the terms of the GNU General Public License version 2 only, as
brutisso@3923:  * published by the Free Software Foundation.
brutisso@3923:  *
brutisso@3923:  * This code is distributed in the hope that it will be useful, but WITHOUT
brutisso@3923:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
brutisso@3923:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
brutisso@3923:  * version 2 for more details (a copy is included in the LICENSE file that
brutisso@3923:  * accompanied this code).
brutisso@3923:  *
brutisso@3923:  * You should have received a copy of the GNU General Public License version
brutisso@3923:  * 2 along with this work; if not, write to the Free Software Foundation,
brutisso@3923:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
brutisso@3923:  *
brutisso@3923:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
brutisso@3923:  * or visit www.oracle.com if you need additional information or have any
brutisso@3923:  * questions.
brutisso@3923:  *
brutisso@3923:  */
brutisso@3923: 
brutisso@3923: 
brutisso@3923: #include "precompiled.hpp"
brutisso@3923: #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
brutisso@3923: #include "gc_implementation/g1/g1GCPhaseTimes.hpp"
brutisso@3923: #include "gc_implementation/g1/g1Log.hpp"
brutisso@3923: 
brutisso@3923: // Helper class for avoiding interleaved logging
brutisso@3923: class LineBuffer: public StackObj {
brutisso@3923: 
brutisso@3923: private:
brutisso@3923:   static const int BUFFER_LEN = 1024;
brutisso@3923:   static const int INDENT_CHARS = 3;
brutisso@3923:   char _buffer[BUFFER_LEN];
brutisso@3923:   int _indent_level;
brutisso@3923:   int _cur;
brutisso@3923: 
brutisso@3923:   void vappend(const char* format, va_list ap) {
brutisso@3923:     int res = vsnprintf(&_buffer[_cur], BUFFER_LEN - _cur, format, ap);
brutisso@3923:     if (res != -1) {
brutisso@3923:       _cur += res;
brutisso@3923:     } else {
brutisso@3923:       DEBUG_ONLY(warning("buffer too small in LineBuffer");)
brutisso@3923:       _buffer[BUFFER_LEN -1] = 0;
brutisso@3923:       _cur = BUFFER_LEN; // vsnprintf above should not add to _buffer if we are called again
brutisso@3923:     }
brutisso@3923:   }
brutisso@3923: 
brutisso@3923: public:
brutisso@3923:   explicit LineBuffer(int indent_level): _indent_level(indent_level), _cur(0) {
brutisso@3923:     for (; (_cur < BUFFER_LEN && _cur < (_indent_level * INDENT_CHARS)); _cur++) {
brutisso@3923:       _buffer[_cur] = ' ';
brutisso@3923:     }
brutisso@3923:   }
brutisso@3923: 
brutisso@3923: #ifndef PRODUCT
brutisso@3923:   ~LineBuffer() {
brutisso@3923:     assert(_cur == _indent_level * INDENT_CHARS, "pending data in buffer - append_and_print_cr() not called?");
brutisso@3923:   }
brutisso@3923: #endif
brutisso@3923: 
brutisso@3923:   void append(const char* format, ...) {
brutisso@3923:     va_list ap;
brutisso@3923:     va_start(ap, format);
brutisso@3923:     vappend(format, ap);
brutisso@3923:     va_end(ap);
brutisso@3923:   }
brutisso@3923: 
brutisso@3923:   void append_and_print_cr(const char* format, ...) {
brutisso@3923:     va_list ap;
brutisso@3923:     va_start(ap, format);
brutisso@3923:     vappend(format, ap);
brutisso@3923:     va_end(ap);
brutisso@3923:     gclog_or_tty->print_cr("%s", _buffer);
brutisso@3923:     _cur = _indent_level * INDENT_CHARS;
brutisso@3923:   }
brutisso@3923: };
brutisso@3923: 
brutisso@4015: template <class T>
brutisso@4015: void WorkerDataArray<T>::print(int level, const char* title) {
brutisso@4015:   if (_length == 1) {
brutisso@4015:     // No need for min, max, average and sum for only one worker
brutisso@4015:     LineBuffer buf(level);
brutisso@4015:     buf.append("[%s:  ", title);
brutisso@4015:     buf.append(_print_format, _data[0]);
brutisso@4015:     buf.append_and_print_cr("]");
brutisso@4015:     return;
brutisso@4015:   }
brutisso@4015: 
brutisso@4015:   T min = _data[0];
brutisso@4015:   T max = _data[0];
brutisso@4015:   T sum = 0;
brutisso@4015: 
brutisso@4015:   LineBuffer buf(level);
brutisso@4015:   buf.append("[%s:", title);
brutisso@4015:   for (uint i = 0; i < _length; ++i) {
brutisso@4015:     T val = _data[i];
brutisso@4015:     min = MIN2(val, min);
brutisso@4015:     max = MAX2(val, max);
brutisso@4015:     sum += val;
brutisso@4015:     if (G1Log::finest()) {
brutisso@4015:       buf.append("  ");
brutisso@4015:       buf.append(_print_format, val);
brutisso@4015:     }
brutisso@4015:   }
brutisso@4015: 
brutisso@4015:   if (G1Log::finest()) {
brutisso@4015:     buf.append_and_print_cr("");
brutisso@4015:   }
brutisso@4015: 
brutisso@4015:   double avg = (double)sum / (double)_length;
brutisso@4015:   buf.append(" Min: ");
brutisso@4015:   buf.append(_print_format, min);
brutisso@4015:   buf.append(", Avg: ");
brutisso@4015:   buf.append("%.1lf", avg); // Always print average as a double
brutisso@4015:   buf.append(", Max: ");
brutisso@4015:   buf.append(_print_format, max);
brutisso@4015:   buf.append(", Diff: ");
brutisso@4015:   buf.append(_print_format, max - min);
brutisso@4015:   if (_print_sum) {
brutisso@4015:     // for things like the start and end times the sum is not
brutisso@4015:     // that relevant
brutisso@4015:     buf.append(", Sum: ");
brutisso@4015:     buf.append(_print_format, sum);
brutisso@4015:   }
brutisso@4015:   buf.append_and_print_cr("]");
brutisso@4015: }
brutisso@4015: 
jmasa@4097: #ifndef PRODUCT
brutisso@4015: 
brutisso@4015: template <class T>
brutisso@4015: void WorkerDataArray<T>::reset() {
brutisso@4015:   for (uint i = 0; i < _length; i++) {
brutisso@4015:     _data[i] = (T)-1;
brutisso@4015:   }
brutisso@4015: }
brutisso@4015: 
brutisso@4015: template <class T>
brutisso@4015: void WorkerDataArray<T>::verify() {
brutisso@4015:   for (uint i = 0; i < _length; i++) {
brutisso@4015:     assert(_data[i] >= (T)0, err_msg("Invalid data for worker %d", i));
brutisso@4015:   }
brutisso@4015: }
brutisso@4015: 
brutisso@4015: #endif
brutisso@4015: 
brutisso@3923: G1GCPhaseTimes::G1GCPhaseTimes(uint max_gc_threads) :
brutisso@3923:   _max_gc_threads(max_gc_threads),
brutisso@3923:   _min_clear_cc_time_ms(-1.0),
brutisso@3923:   _max_clear_cc_time_ms(-1.0),
brutisso@3923:   _cur_clear_cc_time_ms(0.0),
brutisso@3923:   _cum_clear_cc_time_ms(0.0),
brutisso@4015:   _num_cc_clears(0L),
brutisso@4015:   _last_gc_worker_start_times_ms(_max_gc_threads, "%.1lf", false),
brutisso@4015:   _last_ext_root_scan_times_ms(_max_gc_threads, "%.1lf"),
brutisso@4015:   _last_satb_filtering_times_ms(_max_gc_threads, "%.1lf"),
brutisso@4015:   _last_update_rs_times_ms(_max_gc_threads, "%.1lf"),
brutisso@4015:   _last_update_rs_processed_buffers(_max_gc_threads, "%d"),
brutisso@4015:   _last_scan_rs_times_ms(_max_gc_threads, "%.1lf"),
brutisso@4015:   _last_obj_copy_times_ms(_max_gc_threads, "%.1lf"),
brutisso@4015:   _last_termination_times_ms(_max_gc_threads, "%.1lf"),
brutisso@4015:   _last_termination_attempts(_max_gc_threads, SIZE_FORMAT),
brutisso@4015:   _last_gc_worker_end_times_ms(_max_gc_threads, "%.1lf", false),
brutisso@4015:   _last_gc_worker_times_ms(_max_gc_threads, "%.1lf"),
brutisso@4015:   _last_gc_worker_other_times_ms(_max_gc_threads, "%.1lf")
brutisso@3923: {
brutisso@3923:   assert(max_gc_threads > 0, "Must have some GC threads");
brutisso@3923: }
brutisso@3923: 
brutisso@4015: void G1GCPhaseTimes::note_gc_start(uint active_gc_threads) {
brutisso@3923:   assert(active_gc_threads > 0, "The number of threads must be > 0");
brutisso@3923:   assert(active_gc_threads <= _max_gc_threads, "The number of active threads must be <= the max nubmer of threads");
brutisso@3923:   _active_gc_threads = active_gc_threads;
brutisso@3923: 
brutisso@4015:   _last_gc_worker_start_times_ms.reset();
brutisso@4015:   _last_ext_root_scan_times_ms.reset();
brutisso@4015:   _last_satb_filtering_times_ms.reset();
brutisso@4015:   _last_update_rs_times_ms.reset();
brutisso@4015:   _last_update_rs_processed_buffers.reset();
brutisso@4015:   _last_scan_rs_times_ms.reset();
brutisso@4015:   _last_obj_copy_times_ms.reset();
brutisso@4015:   _last_termination_times_ms.reset();
brutisso@4015:   _last_termination_attempts.reset();
brutisso@4015:   _last_gc_worker_end_times_ms.reset();
brutisso@4015:   _last_gc_worker_times_ms.reset();
brutisso@4015:   _last_gc_worker_other_times_ms.reset();
brutisso@3923: }
brutisso@3923: 
brutisso@4015: void G1GCPhaseTimes::note_gc_end() {
brutisso@4015:   _last_gc_worker_start_times_ms.verify();
brutisso@4015:   _last_ext_root_scan_times_ms.verify();
brutisso@4015:   _last_satb_filtering_times_ms.verify();
brutisso@4015:   _last_update_rs_times_ms.verify();
brutisso@4015:   _last_update_rs_processed_buffers.verify();
brutisso@4015:   _last_scan_rs_times_ms.verify();
brutisso@4015:   _last_obj_copy_times_ms.verify();
brutisso@4015:   _last_termination_times_ms.verify();
brutisso@4015:   _last_termination_attempts.verify();
brutisso@4015:   _last_gc_worker_end_times_ms.verify();
brutisso@3923: 
brutisso@3923:     for (uint i = 0; i < _active_gc_threads; i++) {
brutisso@4015:       double worker_time = _last_gc_worker_end_times_ms.get(i) - _last_gc_worker_start_times_ms.get(i);
brutisso@4015:       _last_gc_worker_times_ms.set(i, worker_time);
brutisso@3923: 
brutisso@4015:       double worker_known_time = _last_ext_root_scan_times_ms.get(i) +
brutisso@4015:         _last_satb_filtering_times_ms.get(i) +
brutisso@4015:         _last_update_rs_times_ms.get(i) +
brutisso@4015:         _last_scan_rs_times_ms.get(i) +
brutisso@4015:         _last_obj_copy_times_ms.get(i) +
brutisso@4015:         _last_termination_times_ms.get(i);
brutisso@3923: 
brutisso@4015:       double worker_other_time = worker_time - worker_known_time;
brutisso@4015:       _last_gc_worker_other_times_ms.set(i, worker_other_time);
brutisso@3923:     }
brutisso@3923: 
brutisso@4015:   _last_gc_worker_times_ms.verify();
brutisso@4015:   _last_gc_worker_other_times_ms.verify();
brutisso@3923: }
brutisso@3923: 
brutisso@3923: void G1GCPhaseTimes::print_stats(int level, const char* str, double value) {
brutisso@3923:   LineBuffer(level).append_and_print_cr("[%s: %.1lf ms]", str, value);
brutisso@3923: }
brutisso@3923: 
brutisso@3923: void G1GCPhaseTimes::print_stats(int level, const char* str, double value, int workers) {
brutisso@3923:   LineBuffer(level).append_and_print_cr("[%s: %.1lf ms, GC Workers: %d]", str, value, workers);
brutisso@3923: }
brutisso@3923: 
brutisso@3923: double G1GCPhaseTimes::accounted_time_ms() {
brutisso@3923:     // Subtract the root region scanning wait time. It's initialized to
brutisso@3923:     // zero at the start of the pause.
brutisso@3923:     double misc_time_ms = _root_region_scan_wait_time_ms;
brutisso@3923: 
brutisso@3923:     misc_time_ms += _cur_collection_par_time_ms;
brutisso@3923: 
brutisso@3923:     // Now subtract the time taken to fix up roots in generated code
brutisso@3923:     misc_time_ms += _cur_collection_code_root_fixup_time_ms;
brutisso@3923: 
brutisso@3923:     // Subtract the time taken to clean the card table from the
brutisso@3923:     // current value of "other time"
brutisso@3923:     misc_time_ms += _cur_clear_ct_time_ms;
brutisso@3923: 
brutisso@3923:     return misc_time_ms;
brutisso@3923: }
brutisso@3923: 
brutisso@4015: void G1GCPhaseTimes::print(double pause_time_sec) {
brutisso@3923:   if (_root_region_scan_wait_time_ms > 0.0) {
brutisso@3923:     print_stats(1, "Root Region Scan Waiting", _root_region_scan_wait_time_ms);
brutisso@3923:   }
brutisso@3923:   if (G1CollectedHeap::use_parallel_gc_threads()) {
brutisso@3923:     print_stats(1, "Parallel Time", _cur_collection_par_time_ms, _active_gc_threads);
brutisso@4015:     _last_gc_worker_start_times_ms.print(2, "GC Worker Start (ms)");
brutisso@4015:     _last_ext_root_scan_times_ms.print(2, "Ext Root Scanning (ms)");
brutisso@4015:     if (_last_satb_filtering_times_ms.sum() > 0.0) {
brutisso@4015:       _last_satb_filtering_times_ms.print(2, "SATB Filtering (ms)");
brutisso@3923:     }
brutisso@4015:     _last_update_rs_times_ms.print(2, "Update RS (ms)");
brutisso@4015:       _last_update_rs_processed_buffers.print(3, "Processed Buffers");
brutisso@4015:     _last_scan_rs_times_ms.print(2, "Scan RS (ms)");
brutisso@4015:     _last_obj_copy_times_ms.print(2, "Object Copy (ms)");
brutisso@4015:     _last_termination_times_ms.print(2, "Termination (ms)");
brutisso@3923:     if (G1Log::finest()) {
brutisso@4015:       _last_termination_attempts.print(3, "Termination Attempts");
brutisso@3923:     }
brutisso@4015:     _last_gc_worker_other_times_ms.print(2, "GC Worker Other (ms)");
brutisso@4015:     _last_gc_worker_times_ms.print(2, "GC Worker Total (ms)");
brutisso@4015:     _last_gc_worker_end_times_ms.print(2, "GC Worker End (ms)");
brutisso@4015:   } else {
brutisso@4015:     _last_ext_root_scan_times_ms.print(1, "Ext Root Scanning (ms)");
brutisso@4015:     if (_last_satb_filtering_times_ms.sum() > 0.0) {
brutisso@4015:       _last_satb_filtering_times_ms.print(1, "SATB Filtering (ms)");
brutisso@3923:     }
brutisso@4015:     _last_update_rs_times_ms.print(1, "Update RS (ms)");
brutisso@4015:       _last_update_rs_processed_buffers.print(2, "Processed Buffers");
brutisso@4015:     _last_scan_rs_times_ms.print(1, "Scan RS (ms)");
brutisso@4015:     _last_obj_copy_times_ms.print(1, "Object Copy (ms)");
brutisso@3923:   }
brutisso@3923:   print_stats(1, "Code Root Fixup", _cur_collection_code_root_fixup_time_ms);
brutisso@3923:   print_stats(1, "Clear CT", _cur_clear_ct_time_ms);
brutisso@3923:   if (Verbose && G1Log::finest()) {
brutisso@3923:     print_stats(1, "Cur Clear CC", _cur_clear_cc_time_ms);
brutisso@3923:     print_stats(1, "Cum Clear CC", _cum_clear_cc_time_ms);
brutisso@3923:     print_stats(1, "Min Clear CC", _min_clear_cc_time_ms);
brutisso@3923:     print_stats(1, "Max Clear CC", _max_clear_cc_time_ms);
brutisso@3923:     if (_num_cc_clears > 0) {
brutisso@3923:       print_stats(1, "Avg Clear CC", _cum_clear_cc_time_ms / ((double)_num_cc_clears));
brutisso@3923:     }
brutisso@3923:   }
brutisso@4015:   double misc_time_ms = pause_time_sec * MILLIUNITS - accounted_time_ms();
brutisso@3923:   print_stats(1, "Other", misc_time_ms);
brutisso@4015:   if (_cur_verify_before_time_ms > 0.0) {
brutisso@4015:     print_stats(2, "Verify Before", _cur_verify_before_time_ms);
brutisso@4015:   }
brutisso@3923:   print_stats(2, "Choose CSet",
brutisso@3923:     (_recorded_young_cset_choice_time_ms +
brutisso@3923:     _recorded_non_young_cset_choice_time_ms));
brutisso@3923:   print_stats(2, "Ref Proc", _cur_ref_proc_time_ms);
brutisso@3923:   print_stats(2, "Ref Enq", _cur_ref_enq_time_ms);
brutisso@3923:   print_stats(2, "Free CSet",
brutisso@3923:     (_recorded_young_free_cset_time_ms +
brutisso@3923:     _recorded_non_young_free_cset_time_ms));
brutisso@4015:   if (_cur_verify_after_time_ms > 0.0) {
brutisso@4015:     print_stats(2, "Verify After", _cur_verify_after_time_ms);
brutisso@4015:   }
brutisso@3923: }
brutisso@3923: 
brutisso@3923: void G1GCPhaseTimes::record_cc_clear_time_ms(double ms) {
brutisso@3923:   if (!(Verbose && G1Log::finest())) {
brutisso@3923:     return;
brutisso@3923:   }
brutisso@3923: 
brutisso@3923:   if (_min_clear_cc_time_ms < 0.0 || ms <= _min_clear_cc_time_ms) {
brutisso@3923:     _min_clear_cc_time_ms = ms;
brutisso@3923:   }
brutisso@3923:   if (_max_clear_cc_time_ms < 0.0 || ms >= _max_clear_cc_time_ms) {
brutisso@3923:     _max_clear_cc_time_ms = ms;
brutisso@3923:   }
brutisso@3923:   _cur_clear_cc_time_ms = ms;
brutisso@3923:   _cum_clear_cc_time_ms += ms;
brutisso@3923:   _num_cc_clears++;
brutisso@3923: }