Christopher Ferris | 91f4410 | 2013-05-20 17:24:15 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2013 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 __MEMTRACK_H__ |
| 18 | #define __MEMTRACK_H__ |
| 19 | |
| 20 | #include <sys/types.h> |
| 21 | |
| 22 | #include <map> |
| 23 | #include <string> |
| 24 | #include <vector> |
| 25 | |
| 26 | #define DEFAULT_SLEEP_DELAY_SECONDS 5 |
| 27 | #define NS_PER_SEC 1000000000LL |
| 28 | |
| 29 | class FileData { |
| 30 | public: |
| 31 | FileData(char *filename, char *buffer, size_t buffer_len); |
| 32 | ~FileData(); |
| 33 | |
| 34 | // Get the PSS information from the file data. If there are no more |
| 35 | // PSS values to be found, return false. |
| 36 | bool getPss(size_t *pss); |
| 37 | |
| 38 | // Check if there is at least bytes available in the file data. |
| 39 | bool isAvail(size_t bytes); |
| 40 | |
| 41 | private: |
| 42 | int fd_; |
| 43 | char *data_; |
| 44 | size_t max_; |
| 45 | size_t cur_idx_; |
| 46 | size_t len_; |
| 47 | bool read_complete_; |
| 48 | }; |
| 49 | |
| 50 | typedef struct { |
| 51 | std::string name; |
| 52 | |
| 53 | size_t max_num_pids; |
| 54 | |
| 55 | size_t num_samples; |
| 56 | double avg_pss_kb; |
| 57 | size_t min_pss_kb; |
| 58 | size_t max_pss_kb; |
| 59 | size_t last_pss_kb; |
| 60 | |
| 61 | std::vector<int> pids; |
| 62 | } process_info_t; |
| 63 | typedef std::map<std::string, process_info_t> processes_t; |
| 64 | |
| 65 | typedef struct { |
| 66 | size_t pss_kb; |
| 67 | |
| 68 | std::vector<int> pids; |
| 69 | } cur_process_info_t; |
| 70 | typedef std::map<std::string, cur_process_info_t> cur_processes_t; |
| 71 | |
| 72 | class ProcessInfo { |
| 73 | public: |
| 74 | ProcessInfo(); |
| 75 | ~ProcessInfo(); |
| 76 | |
| 77 | // Get the information about a single process. |
| 78 | bool getInformation(int pid, char *pid_str, size_t pid_str_len); |
| 79 | |
| 80 | // Scan all of the running processes. |
| 81 | void scan(); |
| 82 | |
| 83 | // Dump the information about all of the processes in the system to the log. |
| 84 | void dumpToLog(); |
| 85 | |
| 86 | private: |
| 87 | static const size_t kBufferLen = 4096; |
| 88 | static const size_t kCmdNameLen = 1024; |
| 89 | |
| 90 | static const char *kProc; |
| 91 | static const size_t kProcLen = 6; |
| 92 | |
| 93 | static const char *kCmdline; |
| 94 | static const size_t kCmdlineLen = 9; // Includes \0 at end of string. |
| 95 | |
| 96 | static const char *kSmaps; |
| 97 | static const size_t kSmapsLen = 7; // Includes \0 at end of string. |
| 98 | |
| 99 | static const char *kStatus; |
| 100 | static const size_t kStatusLen = 8; // Includes \0 at end of string. |
| 101 | |
| 102 | static const size_t kInitialEntries = 1000; |
| 103 | |
| 104 | char proc_file_[PATH_MAX]; |
| 105 | char buffer_[kBufferLen]; |
| 106 | |
| 107 | char cmd_name_[kCmdNameLen]; |
| 108 | |
| 109 | // Minimize a need for a lot of allocations by keeping our maps and |
| 110 | // lists in this object. |
| 111 | processes_t all_; |
| 112 | cur_processes_t cur_; |
| 113 | std::vector<const process_info_t *> list_; |
| 114 | |
| 115 | // Compute a running average. |
| 116 | static inline void computeAvg(double *running_avg, size_t cur_avg, |
| 117 | size_t num_samples) { |
| 118 | *running_avg = (*running_avg/(num_samples+1))*num_samples |
| 119 | + (double)cur_avg/(num_samples+1); |
| 120 | } |
| 121 | }; |
| 122 | |
| 123 | #endif // __MEMTRACK_H__ |