1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 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 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 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. 15 */ 16 17 #ifndef ANDROID_MEDIA_REPORTPERFORMANCE_H 18 #define ANDROID_MEDIA_REPORTPERFORMANCE_H 19 20 #include <deque> 21 #include <map> 22 #include <vector> 23 24 namespace android { 25 namespace ReportPerformance { 26 27 struct PerformanceData; 28 29 // Dumps performance data in a JSON format. 30 void dumpJson(int fd, const std::map<int, PerformanceData>& threadDataMap); 31 32 //Dumps performance data as visualized plots. 33 void dumpPlots(int fd, const std::map<int, PerformanceData>& threadDataMap); 34 35 // Dumps snapshots at important events in the past. 36 void dumpRetro(int fd, const std::map<int, PerformanceData>& threadDataMap); 37 38 // Send one thread's data to media metrics, if the performance data is nontrivial (i.e. not 39 // all zero values). Return true if data was sent, false if there is nothing to write 40 // or an error occurred while writing. 41 bool sendToMediaMetrics(const PerformanceData& data); 42 43 //------------------------------------------------------------------------------ 44 45 constexpr int kMsPerSec = 1000; 46 constexpr int kSecPerMin = 60; 47 48 constexpr int kJiffyPerMs = 10; // time unit for histogram as a multiple of milliseconds 49 50 // stores a histogram: key: observed buffer period (multiple of jiffy). value: count 51 using Hist = std::map<int, int>; 52 53 using msInterval = double; 54 using jiffyInterval = double; 55 56 using timestamp = int64_t; 57 58 using log_hash_t = uint64_t; 59 60 static inline int deltaMs(int64_t ns1, int64_t ns2) { 61 return (ns2 - ns1) / (1000 * 1000); 62 } 63 64 static inline int deltaJiffy(int64_t ns1, int64_t ns2) { 65 return (kJiffyPerMs * (ns2 - ns1)) / (1000 * 1000); 66 } 67 68 static inline uint32_t log2(uint32_t x) { 69 // This works for x > 0 70 return 31 - __builtin_clz(x); 71 } 72 73 // Writes outlier intervals, timestamps, peaks timestamps, and histograms to a file. 74 void writeToFile(const std::deque<std::pair<timestamp, Hist>> &hists, 75 const std::deque<std::pair<msInterval, timestamp>> &outlierData, 76 const std::deque<timestamp> &peakTimestamps, 77 const char * kDirectory, bool append, int author, log_hash_t hash); 78 79 } // namespace ReportPerformance 80 } // namespace android 81 82 #endif // ANDROID_MEDIA_REPORTPERFORMANCE_H 83
