diff options
Diffstat (limited to 'chromium/cc/scheduler/rolling_time_delta_history.cc')
-rw-r--r-- | chromium/cc/scheduler/rolling_time_delta_history.cc | 65 |
1 files changed, 0 insertions, 65 deletions
diff --git a/chromium/cc/scheduler/rolling_time_delta_history.cc b/chromium/cc/scheduler/rolling_time_delta_history.cc deleted file mode 100644 index 8d8bba5032f..00000000000 --- a/chromium/cc/scheduler/rolling_time_delta_history.cc +++ /dev/null @@ -1,65 +0,0 @@ -// Copyright 2013 The Chromium Authors. All rights reserved. -// Use of this source code is governed by a BSD-style license that can be -// found in the LICENSE file. - -#include <cmath> - -#include "cc/scheduler/rolling_time_delta_history.h" - -namespace cc { - -RollingTimeDeltaHistory::RollingTimeDeltaHistory(size_t max_size) - : max_size_(max_size) { -} - -RollingTimeDeltaHistory::~RollingTimeDeltaHistory() { -} - -void RollingTimeDeltaHistory::InsertSample(base::TimeDelta time) { - if (max_size_ == 0) - return; - - if (sample_set_.size() == max_size_) { - sample_set_.erase(chronological_sample_deque_.front()); - chronological_sample_deque_.pop_front(); - } - - TimeDeltaMultiset::iterator it = sample_set_.insert(time); - chronological_sample_deque_.push_back(it); -} - -void RollingTimeDeltaHistory::Clear() { - chronological_sample_deque_.clear(); - sample_set_.clear(); -} - -base::TimeDelta RollingTimeDeltaHistory::Percentile(double percent) const { - if (sample_set_.size() == 0) - return base::TimeDelta(); - - double fraction = percent / 100.0; - - if (fraction <= 0.0) - return *(sample_set_.begin()); - - if (fraction >= 1.0) - return *(sample_set_.rbegin()); - - size_t num_smaller_samples = - static_cast<size_t>(std::ceil(fraction * sample_set_.size())) - 1; - - if (num_smaller_samples > sample_set_.size() / 2) { - size_t num_larger_samples = sample_set_.size() - num_smaller_samples - 1; - TimeDeltaMultiset::const_reverse_iterator it = sample_set_.rbegin(); - for (size_t i = 0; i < num_larger_samples; i++) - it++; - return *it; - } - - TimeDeltaMultiset::const_iterator it = sample_set_.begin(); - for (size_t i = 0; i < num_smaller_samples; i++) - it++; - return *it; -} - -} // namespace cc |