2 * Copyright 2015 Facebook, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #ifndef FOLLY_STATS_MULTILEVELTIMESERIES_DEFS_H_
18 #define FOLLY_STATS_MULTILEVELTIMESERIES_DEFS_H_
20 #include <glog/logging.h>
24 template <typename VT, typename TT>
25 MultiLevelTimeSeries<VT, TT>::MultiLevelTimeSeries(
28 const TimeType levelDurations[])
33 CHECK(levelDurations);
35 levels_.reserve(nLevels);
36 for (size_t i = 0; i < nLevels; ++i) {
37 if (levelDurations[i] == TT(0)) {
38 CHECK_EQ(i, nLevels - 1);
40 CHECK(levelDurations[i-1] < levelDurations[i]);
42 levels_.emplace_back(nBuckets, levelDurations[i]);
46 template <typename VT, typename TT>
47 void MultiLevelTimeSeries<VT, TT>::addValue(TimeType now,
48 const ValueType& val) {
49 addValueAggregated(now, val, 1);
52 template <typename VT, typename TT>
53 void MultiLevelTimeSeries<VT, TT>::addValue(TimeType now,
56 addValueAggregated(now, val * times, times);
59 template <typename VT, typename TT>
60 void MultiLevelTimeSeries<VT, TT>::addValueAggregated(TimeType now,
61 const ValueType& total,
63 if (cachedTime_ != now) {
68 cachedCount_ += nsamples;
71 template <typename VT, typename TT>
72 void MultiLevelTimeSeries<VT, TT>::update(TimeType now) {
74 for (size_t i = 0; i < levels_.size(); ++i) {
75 levels_[i].update(now);
79 template <typename VT, typename TT>
80 void MultiLevelTimeSeries<VT, TT>::flush() {
81 // update all the underlying levels
82 if (cachedCount_ > 0) {
83 for (size_t i = 0; i < levels_.size(); ++i) {
84 levels_[i].addValueAggregated(cachedTime_, cachedSum_, cachedCount_);
91 template <typename VT, typename TT>
92 void MultiLevelTimeSeries<VT, TT>::clear() {
93 for (auto & level : levels_) {
97 cachedTime_ = TimeType(0);
104 #endif // FOLLY_STATS_MULTILEVELTIMESERIES_DEFS_H_