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7c673cae | 1 | // Copyright (c) 2011-present, Facebook, Inc. All rights reserved. |
11fdf7f2 TL |
2 | // This source code is licensed under both the GPLv2 (found in the |
3 | // COPYING file in the root directory) and Apache 2.0 License | |
4 | // (found in the LICENSE.Apache file in the root directory). | |
7c673cae FG |
5 | // |
6 | #include "monitoring/statistics.h" | |
7 | ||
8 | #ifndef __STDC_FORMAT_MACROS | |
9 | #define __STDC_FORMAT_MACROS | |
10 | #endif | |
11 | ||
12 | #include <inttypes.h> | |
13 | #include "rocksdb/statistics.h" | |
14 | #include "port/likely.h" | |
15 | #include <algorithm> | |
16 | #include <cstdio> | |
17 | ||
18 | namespace rocksdb { | |
19 | ||
20 | std::shared_ptr<Statistics> CreateDBStatistics() { | |
21 | return std::make_shared<StatisticsImpl>(nullptr, false); | |
22 | } | |
23 | ||
11fdf7f2 TL |
24 | StatisticsImpl::StatisticsImpl(std::shared_ptr<Statistics> stats, |
25 | bool enable_internal_stats) | |
26 | : stats_(std::move(stats)), enable_internal_stats_(enable_internal_stats) {} | |
7c673cae FG |
27 | |
28 | StatisticsImpl::~StatisticsImpl() {} | |
29 | ||
30 | uint64_t StatisticsImpl::getTickerCount(uint32_t tickerType) const { | |
31 | MutexLock lock(&aggregate_lock_); | |
32 | return getTickerCountLocked(tickerType); | |
33 | } | |
34 | ||
35 | uint64_t StatisticsImpl::getTickerCountLocked(uint32_t tickerType) const { | |
36 | assert( | |
37 | enable_internal_stats_ ? | |
38 | tickerType < INTERNAL_TICKER_ENUM_MAX : | |
39 | tickerType < TICKER_ENUM_MAX); | |
11fdf7f2 TL |
40 | uint64_t res = 0; |
41 | for (size_t core_idx = 0; core_idx < per_core_stats_.Size(); ++core_idx) { | |
42 | res += per_core_stats_.AccessAtCore(core_idx)->tickers_[tickerType]; | |
7c673cae | 43 | } |
11fdf7f2 | 44 | return res; |
7c673cae FG |
45 | } |
46 | ||
47 | void StatisticsImpl::histogramData(uint32_t histogramType, | |
48 | HistogramData* const data) const { | |
49 | MutexLock lock(&aggregate_lock_); | |
11fdf7f2 | 50 | getHistogramImplLocked(histogramType)->Data(data); |
7c673cae FG |
51 | } |
52 | ||
11fdf7f2 TL |
53 | std::unique_ptr<HistogramImpl> StatisticsImpl::getHistogramImplLocked( |
54 | uint32_t histogramType) const { | |
7c673cae FG |
55 | assert( |
56 | enable_internal_stats_ ? | |
57 | histogramType < INTERNAL_HISTOGRAM_ENUM_MAX : | |
58 | histogramType < HISTOGRAM_ENUM_MAX); | |
11fdf7f2 TL |
59 | std::unique_ptr<HistogramImpl> res_hist(new HistogramImpl()); |
60 | for (size_t core_idx = 0; core_idx < per_core_stats_.Size(); ++core_idx) { | |
61 | res_hist->Merge( | |
62 | per_core_stats_.AccessAtCore(core_idx)->histograms_[histogramType]); | |
63 | } | |
64 | return res_hist; | |
7c673cae FG |
65 | } |
66 | ||
67 | std::string StatisticsImpl::getHistogramString(uint32_t histogramType) const { | |
68 | MutexLock lock(&aggregate_lock_); | |
11fdf7f2 | 69 | return getHistogramImplLocked(histogramType)->ToString(); |
7c673cae FG |
70 | } |
71 | ||
72 | void StatisticsImpl::setTickerCount(uint32_t tickerType, uint64_t count) { | |
73 | { | |
74 | MutexLock lock(&aggregate_lock_); | |
75 | setTickerCountLocked(tickerType, count); | |
76 | } | |
77 | if (stats_ && tickerType < TICKER_ENUM_MAX) { | |
78 | stats_->setTickerCount(tickerType, count); | |
79 | } | |
80 | } | |
81 | ||
82 | void StatisticsImpl::setTickerCountLocked(uint32_t tickerType, uint64_t count) { | |
83 | assert(enable_internal_stats_ ? tickerType < INTERNAL_TICKER_ENUM_MAX | |
84 | : tickerType < TICKER_ENUM_MAX); | |
11fdf7f2 TL |
85 | for (size_t core_idx = 0; core_idx < per_core_stats_.Size(); ++core_idx) { |
86 | if (core_idx == 0) { | |
87 | per_core_stats_.AccessAtCore(core_idx)->tickers_[tickerType] = count; | |
88 | } else { | |
89 | per_core_stats_.AccessAtCore(core_idx)->tickers_[tickerType] = 0; | |
90 | } | |
7c673cae FG |
91 | } |
92 | } | |
93 | ||
94 | uint64_t StatisticsImpl::getAndResetTickerCount(uint32_t tickerType) { | |
95 | uint64_t sum = 0; | |
96 | { | |
97 | MutexLock lock(&aggregate_lock_); | |
98 | assert(enable_internal_stats_ ? tickerType < INTERNAL_TICKER_ENUM_MAX | |
99 | : tickerType < TICKER_ENUM_MAX); | |
11fdf7f2 TL |
100 | for (size_t core_idx = 0; core_idx < per_core_stats_.Size(); ++core_idx) { |
101 | sum += | |
102 | per_core_stats_.AccessAtCore(core_idx)->tickers_[tickerType].exchange( | |
103 | 0, std::memory_order_relaxed); | |
7c673cae FG |
104 | } |
105 | } | |
106 | if (stats_ && tickerType < TICKER_ENUM_MAX) { | |
107 | stats_->setTickerCount(tickerType, 0); | |
108 | } | |
109 | return sum; | |
110 | } | |
111 | ||
112 | void StatisticsImpl::recordTick(uint32_t tickerType, uint64_t count) { | |
113 | assert( | |
114 | enable_internal_stats_ ? | |
115 | tickerType < INTERNAL_TICKER_ENUM_MAX : | |
116 | tickerType < TICKER_ENUM_MAX); | |
11fdf7f2 TL |
117 | per_core_stats_.Access()->tickers_[tickerType].fetch_add( |
118 | count, std::memory_order_relaxed); | |
7c673cae FG |
119 | if (stats_ && tickerType < TICKER_ENUM_MAX) { |
120 | stats_->recordTick(tickerType, count); | |
121 | } | |
122 | } | |
123 | ||
124 | void StatisticsImpl::measureTime(uint32_t histogramType, uint64_t value) { | |
125 | assert( | |
126 | enable_internal_stats_ ? | |
127 | histogramType < INTERNAL_HISTOGRAM_ENUM_MAX : | |
128 | histogramType < HISTOGRAM_ENUM_MAX); | |
11fdf7f2 | 129 | per_core_stats_.Access()->histograms_[histogramType].Add(value); |
7c673cae FG |
130 | if (stats_ && histogramType < HISTOGRAM_ENUM_MAX) { |
131 | stats_->measureTime(histogramType, value); | |
132 | } | |
133 | } | |
134 | ||
135 | Status StatisticsImpl::Reset() { | |
136 | MutexLock lock(&aggregate_lock_); | |
137 | for (uint32_t i = 0; i < TICKER_ENUM_MAX; ++i) { | |
138 | setTickerCountLocked(i, 0); | |
139 | } | |
140 | for (uint32_t i = 0; i < HISTOGRAM_ENUM_MAX; ++i) { | |
11fdf7f2 TL |
141 | for (size_t core_idx = 0; core_idx < per_core_stats_.Size(); ++core_idx) { |
142 | per_core_stats_.AccessAtCore(core_idx)->histograms_[i].Clear(); | |
143 | } | |
7c673cae FG |
144 | } |
145 | return Status::OK(); | |
146 | } | |
147 | ||
148 | namespace { | |
149 | ||
150 | // a buffer size used for temp string buffers | |
151 | const int kTmpStrBufferSize = 200; | |
152 | ||
153 | } // namespace | |
154 | ||
155 | std::string StatisticsImpl::ToString() const { | |
156 | MutexLock lock(&aggregate_lock_); | |
157 | std::string res; | |
158 | res.reserve(20000); | |
159 | for (const auto& t : TickersNameMap) { | |
160 | if (t.first < TICKER_ENUM_MAX || enable_internal_stats_) { | |
161 | char buffer[kTmpStrBufferSize]; | |
162 | snprintf(buffer, kTmpStrBufferSize, "%s COUNT : %" PRIu64 "\n", | |
163 | t.second.c_str(), getTickerCountLocked(t.first)); | |
164 | res.append(buffer); | |
165 | } | |
166 | } | |
167 | for (const auto& h : HistogramsNameMap) { | |
168 | if (h.first < HISTOGRAM_ENUM_MAX || enable_internal_stats_) { | |
169 | char buffer[kTmpStrBufferSize]; | |
170 | HistogramData hData; | |
11fdf7f2 TL |
171 | getHistogramImplLocked(h.first)->Data(&hData); |
172 | // don't handle failures - buffer should always be big enough and arguments | |
173 | // should be provided correctly | |
174 | int ret = snprintf( | |
7c673cae | 175 | buffer, kTmpStrBufferSize, |
11fdf7f2 TL |
176 | "%s P50 : %f P95 : %f P99 : %f P100 : %f COUNT : %" PRIu64 " SUM : %" |
177 | PRIu64 "\n", h.second.c_str(), hData.median, hData.percentile95, | |
178 | hData.percentile99, hData.max, hData.count, hData.sum); | |
179 | if (ret < 0 || ret >= kTmpStrBufferSize) { | |
180 | assert(false); | |
181 | continue; | |
182 | } | |
7c673cae FG |
183 | res.append(buffer); |
184 | } | |
185 | } | |
186 | res.shrink_to_fit(); | |
187 | return res; | |
188 | } | |
189 | ||
190 | bool StatisticsImpl::HistEnabledForType(uint32_t type) const { | |
191 | if (LIKELY(!enable_internal_stats_)) { | |
192 | return type < HISTOGRAM_ENUM_MAX; | |
193 | } | |
194 | return true; | |
195 | } | |
196 | ||
197 | } // namespace rocksdb |