Jin Qian | bcd6e3b | 2016-12-28 15:43:51 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2016 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 | #define LOG_TAG "storaged" |
| 18 | |
| 19 | #include <stdint.h> |
| 20 | #include <time.h> |
| 21 | |
| 22 | #include <string> |
| 23 | #include <sstream> |
| 24 | #include <unordered_map> |
| 25 | |
| 26 | #include <android-base/file.h> |
| 27 | #include <android-base/logging.h> |
| 28 | #include <android-base/macros.h> |
| 29 | #include <android-base/stringprintf.h> |
| 30 | #include <log/log_event_list.h> |
| 31 | #include <packagelistparser/packagelistparser.h> |
| 32 | |
| 33 | #include "storaged.h" |
| 34 | #include "storaged_uid_monitor.h" |
| 35 | |
| 36 | static const uint64_t io_alert_threshold = 1024 * 1024 * 1024; // 1GB |
| 37 | |
| 38 | using namespace android; |
| 39 | using namespace android::base; |
| 40 | |
| 41 | static bool packagelist_parse_cb(pkg_info* info, void* userdata) |
| 42 | { |
| 43 | std::unordered_map<uint32_t, struct uid_info>* uids = |
| 44 | reinterpret_cast<std::unordered_map<uint32_t, struct uid_info>*>(userdata); |
| 45 | |
| 46 | if (uids->find(info->uid) != uids->end()) { |
| 47 | (*uids)[info->uid].name = info->name; |
| 48 | } |
| 49 | |
| 50 | packagelist_free(info); |
| 51 | return true; |
| 52 | } |
| 53 | |
| 54 | void uid_monitor::set_last_uids(std::unordered_map<uint32_t, struct uid_info>&& uids, |
| 55 | uint64_t ts) |
| 56 | { |
| 57 | last_uids = uids; |
| 58 | last_report_ts = ts; |
| 59 | } |
| 60 | |
| 61 | std::unordered_map<uint32_t, struct uid_info> uid_monitor::get_uids() |
| 62 | { |
| 63 | std::unordered_map<uint32_t, struct uid_info> uids; |
| 64 | std::string buffer; |
| 65 | if (!android::base::ReadFileToString(UID_IO_STATS_PATH, &buffer)) { |
| 66 | PLOG_TO(SYSTEM, ERROR) << UID_IO_STATS_PATH << ": ReadFileToString failed"; |
| 67 | return uids; |
| 68 | } |
| 69 | |
| 70 | std::stringstream ss(buffer); |
| 71 | struct uid_info u; |
| 72 | bool refresh_uid = false; |
| 73 | |
| 74 | while (ss >> u.uid) { |
| 75 | ss >> u.io[UID_FOREGROUND].rchar >> u.io[UID_FOREGROUND].wchar |
| 76 | >> u.io[UID_FOREGROUND].read_bytes >> u.io[UID_FOREGROUND].write_bytes |
| 77 | >> u.io[UID_BACKGROUND].rchar >> u.io[UID_BACKGROUND].wchar |
| 78 | >> u.io[UID_BACKGROUND].read_bytes >> u.io[UID_BACKGROUND].write_bytes; |
| 79 | |
| 80 | if (!ss.good()) { |
| 81 | ss.clear(std::ios_base::badbit); |
| 82 | break; |
| 83 | } |
| 84 | |
| 85 | if (last_uids.find(u.uid) == last_uids.end()) { |
| 86 | refresh_uid = true; |
| 87 | u.name = std::to_string(u.uid); |
| 88 | } else { |
| 89 | u.name = last_uids[u.uid].name; |
| 90 | } |
| 91 | uids[u.uid] = u; |
| 92 | } |
| 93 | |
| 94 | if (!ss.eof() || ss.bad()) { |
| 95 | uids.clear(); |
| 96 | LOG_TO(SYSTEM, ERROR) << "read UID IO stats failed"; |
| 97 | } |
| 98 | |
| 99 | if (refresh_uid) { |
| 100 | packagelist_parse(packagelist_parse_cb, &uids); |
| 101 | } |
| 102 | |
| 103 | return uids; |
| 104 | } |
| 105 | |
| 106 | void uid_monitor::report() |
| 107 | { |
| 108 | struct timespec ts; |
| 109 | |
| 110 | // Use monotonic to exclude suspend time so that we measure IO bytes/sec |
| 111 | // when system is running. |
| 112 | if (clock_gettime(CLOCK_MONOTONIC, &ts) < 0) { |
| 113 | PLOG_TO(SYSTEM, ERROR) << "clock_gettime() failed"; |
| 114 | return; |
| 115 | } |
| 116 | |
| 117 | uint64_t curr_ts = ts.tv_sec * NS_PER_SEC + ts.tv_nsec; |
| 118 | uint64_t ts_delta = curr_ts - last_report_ts; |
| 119 | uint64_t adjusted_threshold = io_alert_threshold * ((double)ts_delta / interval / NS_PER_SEC); |
| 120 | |
| 121 | std::unordered_map<uint32_t, struct uid_info> uids = get_uids(); |
| 122 | if (uids.empty()) { |
| 123 | return; |
| 124 | } |
| 125 | |
| 126 | for (const auto& it : uids) { |
| 127 | const struct uid_info& uid = it.second; |
| 128 | uint64_t bg_read_delta = uid.io[UID_BACKGROUND].read_bytes - |
| 129 | last_uids[uid.uid].io[UID_BACKGROUND].read_bytes; |
| 130 | uint64_t bg_write_delta = uid.io[UID_BACKGROUND].write_bytes - |
| 131 | last_uids[uid.uid].io[UID_BACKGROUND].write_bytes; |
| 132 | |
| 133 | if (bg_read_delta + bg_write_delta >= adjusted_threshold) { |
| 134 | android_log_event_list(EVENTLOGTAG_UID_IO_ALERT) |
| 135 | << uid.name << bg_read_delta << bg_write_delta |
| 136 | << uint64_t(ts_delta / NS_PER_SEC) << LOG_ID_EVENTS; |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | set_last_uids(std::move(uids), curr_ts); |
| 141 | } |
| 142 | |
| 143 | uid_monitor::uid_monitor() |
| 144 | { |
| 145 | struct timespec ts; |
| 146 | |
| 147 | if (clock_gettime(CLOCK_MONOTONIC, &ts) < 0) { |
| 148 | PLOG_TO(SYSTEM, ERROR) << "clock_gettime() failed"; |
| 149 | return; |
| 150 | } |
| 151 | last_report_ts = ts.tv_sec * NS_PER_SEC + ts.tv_nsec; |
| 152 | } |