1// Copyright 2012 the V8 project authors. All rights reserved. 2// Redistribution and use in source and binary forms, with or without 3// modification, are permitted provided that the following conditions are 4// met: 5// 6// * Redistributions of source code must retain the above copyright 7// notice, this list of conditions and the following disclaimer. 8// * Redistributions in binary form must reproduce the above 9// copyright notice, this list of conditions and the following 10// disclaimer in the documentation and/or other materials provided 11// with the distribution. 12// * Neither the name of Google Inc. nor the names of its 13// contributors may be used to endorse or promote products derived 14// from this software without specific prior written permission. 15// 16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28#include "v8.h" 29 30#include "counters.h" 31#include "isolate.h" 32#include "platform.h" 33 34namespace v8 { 35namespace internal { 36 37StatsTable::StatsTable() 38 : lookup_function_(NULL), 39 create_histogram_function_(NULL), 40 add_histogram_sample_function_(NULL) {} 41 42 43int* StatsCounter::FindLocationInStatsTable() const { 44 return Isolate::Current()->stats_table()->FindLocation(name_); 45} 46 47 48void Histogram::AddSample(int sample) { 49 if (Enabled()) { 50 isolate()->stats_table()->AddHistogramSample(histogram_, sample); 51 } 52} 53 54void* Histogram::CreateHistogram() const { 55 return isolate()->stats_table()-> 56 CreateHistogram(name_, min_, max_, num_buckets_); 57} 58 59 60// Start the timer. 61void HistogramTimer::Start() { 62 if (Enabled()) { 63 stop_time_ = 0; 64 start_time_ = OS::Ticks(); 65 } 66 if (FLAG_log_internal_timer_events) { 67 LOG(isolate(), TimerEvent(Logger::START, name())); 68 } 69} 70 71 72// Stop the timer and record the results. 73void HistogramTimer::Stop() { 74 if (Enabled()) { 75 stop_time_ = OS::Ticks(); 76 // Compute the delta between start and stop, in milliseconds. 77 int milliseconds = static_cast<int>(stop_time_ - start_time_) / 1000; 78 AddSample(milliseconds); 79 } 80 if (FLAG_log_internal_timer_events) { 81 LOG(isolate(), TimerEvent(Logger::END, name())); 82 } 83} 84 85} } // namespace v8::internal 86