Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 1 | /* |
| 2 | ** |
| 3 | ** Copyright 2015, The Android Open Source Project |
| 4 | ** |
| 5 | ** Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | ** you may not use this file except in compliance with the License. |
| 7 | ** You may obtain a copy of the License at |
| 8 | ** |
| 9 | ** http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | ** |
| 11 | ** Unless required by applicable law or agreed to in writing, software |
| 12 | ** distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | ** See the License for the specific language governing permissions and |
| 15 | ** limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #include <assert.h> |
| 19 | #include <dirent.h> |
| 20 | #include <errno.h> |
| 21 | #include <fcntl.h> |
| 22 | #include <signal.h> |
| 23 | #include <stdio.h> |
| 24 | #include <stdlib.h> |
| 25 | #include <string.h> |
| 26 | #include <sys/stat.h> |
| 27 | #include <sys/types.h> |
Than McIntosh | 07f00fd | 2015-04-17 15:10:43 -0400 | [diff] [blame] | 28 | #include <sys/wait.h> |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 29 | #include <time.h> |
| 30 | #include <unistd.h> |
| 31 | #include <string> |
Than McIntosh | 07f00fd | 2015-04-17 15:10:43 -0400 | [diff] [blame] | 32 | #include <sstream> |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 33 | #include <map> |
Dehao Chen | 5c41562 | 2015-05-07 13:16:35 -0700 | [diff] [blame] | 34 | #include <set> |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 35 | #include <cctype> |
| 36 | |
Than McIntosh | 2297612 | 2015-06-10 11:47:01 -0400 | [diff] [blame] | 37 | #include <base/file.h> |
Dehao Chen | 5c41562 | 2015-05-07 13:16:35 -0700 | [diff] [blame] | 38 | #include <base/stringprintf.h> |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 39 | #include <cutils/properties.h> |
| 40 | |
| 41 | #include "perfprofdcore.h" |
| 42 | #include "perfprofdutils.h" |
| 43 | #include "perf_data_converter.h" |
Than McIntosh | 07f00fd | 2015-04-17 15:10:43 -0400 | [diff] [blame] | 44 | #include "cpuconfig.h" |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 45 | |
| 46 | // |
| 47 | // Perf profiling daemon -- collects system-wide profiles using |
| 48 | // |
Than McIntosh | 07f00fd | 2015-04-17 15:10:43 -0400 | [diff] [blame] | 49 | // simpleperf record -a |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 50 | // |
| 51 | // and encodes them so that they can be uploaded by a separate service. |
| 52 | // |
| 53 | |
| 54 | //...................................................................... |
| 55 | |
| 56 | // |
Than McIntosh | 07f00fd | 2015-04-17 15:10:43 -0400 | [diff] [blame] | 57 | // Output file from 'perf record'. |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 58 | // |
| 59 | #define PERF_OUTPUT "perf.data" |
| 60 | |
| 61 | // |
| 62 | // This enum holds the results of the "should we profile" configuration check. |
| 63 | // |
| 64 | typedef enum { |
| 65 | |
| 66 | // All systems go for profile collection. |
| 67 | DO_COLLECT_PROFILE, |
| 68 | |
Dehao Chen | 768b73e | 2015-05-05 15:03:48 -0700 | [diff] [blame] | 69 | // The selected configuration directory doesn't exist. |
| 70 | DONT_PROFILE_MISSING_CONFIG_DIR, |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 71 | |
| 72 | // Destination directory does not contain the semaphore file that |
| 73 | // the perf profile uploading service creates when it determines |
| 74 | // that the user has opted "in" for usage data collection. No |
| 75 | // semaphore -> no user approval -> no profiling. |
| 76 | DONT_PROFILE_MISSING_SEMAPHORE, |
| 77 | |
| 78 | // No perf executable present |
| 79 | DONT_PROFILE_MISSING_PERF_EXECUTABLE, |
| 80 | |
| 81 | // We're running in the emulator, perf won't be able to do much |
| 82 | DONT_PROFILE_RUNNING_IN_EMULATOR |
| 83 | |
| 84 | } CKPROFILE_RESULT; |
| 85 | |
| 86 | // |
| 87 | // Are we running in the emulator? If so, stub out profile collection |
| 88 | // Starts as uninitialized (-1), then set to 1 or 0 at init time. |
| 89 | // |
| 90 | static int running_in_emulator = -1; |
| 91 | |
| 92 | // |
| 93 | // Is this a debug build ('userdebug' or 'eng')? |
| 94 | // Starts as uninitialized (-1), then set to 1 or 0 at init time. |
| 95 | // |
| 96 | static int is_debug_build = -1; |
| 97 | |
| 98 | // |
| 99 | // Random number generator seed (set at startup time). |
| 100 | // |
| 101 | static unsigned short random_seed[3]; |
| 102 | |
| 103 | // |
| 104 | // Config file path. May be overridden with -c command line option |
| 105 | // |
Dehao Chen | 768b73e | 2015-05-05 15:03:48 -0700 | [diff] [blame] | 106 | static const char *config_file_path = |
| 107 | "/data/data/com.google.android.gms/files/perfprofd.conf"; |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 108 | |
| 109 | // |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 110 | // This table describes the config file syntax in terms of key/value pairs. |
| 111 | // Values come in two flavors: strings, or unsigned integers. In the latter |
| 112 | // case the reader sets allowable minimum/maximum for the setting. |
| 113 | // |
| 114 | class ConfigReader { |
| 115 | |
| 116 | public: |
| 117 | ConfigReader(); |
| 118 | ~ConfigReader(); |
| 119 | |
| 120 | // Ask for the current setting of a config item |
Than McIntosh | 07f00fd | 2015-04-17 15:10:43 -0400 | [diff] [blame] | 121 | unsigned getUnsignedValue(const char *key) const; |
| 122 | std::string getStringValue(const char *key) const; |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 123 | |
| 124 | // read the specified config file, applying any settings it contains |
Than McIntosh | 14d9b4f | 2015-05-21 14:44:34 -0400 | [diff] [blame] | 125 | void readFile(bool initial); |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 126 | |
| 127 | private: |
| 128 | void addUnsignedEntry(const char *key, |
| 129 | unsigned default_value, |
| 130 | unsigned min_value, |
| 131 | unsigned max_value); |
| 132 | void addStringEntry(const char *key, const char *default_value); |
| 133 | void addDefaultEntries(); |
| 134 | void parseLine(const char *key, const char *value, unsigned linecount); |
| 135 | |
| 136 | typedef struct { unsigned minv, maxv; } values; |
| 137 | std::map<std::string, values> u_info; |
| 138 | std::map<std::string, unsigned> u_entries; |
| 139 | std::map<std::string, std::string> s_entries; |
| 140 | bool trace_config_read; |
| 141 | }; |
| 142 | |
| 143 | ConfigReader::ConfigReader() |
| 144 | : trace_config_read(false) |
| 145 | { |
| 146 | addDefaultEntries(); |
| 147 | } |
| 148 | |
| 149 | ConfigReader::~ConfigReader() |
| 150 | { |
| 151 | } |
| 152 | |
| 153 | // |
| 154 | // Populate the reader with the set of allowable entries |
| 155 | // |
| 156 | void ConfigReader::addDefaultEntries() |
| 157 | { |
| 158 | // Average number of seconds between perf profile collections (if |
| 159 | // set to 100, then over time we want to see a perf profile |
| 160 | // collected every 100 seconds). The actual time within the interval |
| 161 | // for the collection is chosen randomly. |
Than McIntosh | 14d9b4f | 2015-05-21 14:44:34 -0400 | [diff] [blame] | 162 | addUnsignedEntry("collection_interval", 14400, 100, UINT32_MAX); |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 163 | |
| 164 | // Use the specified fixed seed for random number generation (unit |
| 165 | // testing) |
| 166 | addUnsignedEntry("use_fixed_seed", 0, 0, UINT32_MAX); |
| 167 | |
| 168 | // For testing purposes, number of times to iterate through main |
| 169 | // loop. Value of zero indicates that we should loop forever. |
| 170 | addUnsignedEntry("main_loop_iterations", 0, 0, UINT32_MAX); |
| 171 | |
| 172 | // Destination directory (where to write profiles). This location |
| 173 | // chosen since it is accessible to the uploader service. |
Dehao Chen | 768b73e | 2015-05-05 15:03:48 -0700 | [diff] [blame] | 174 | addStringEntry("destination_directory", "/data/misc/perfprofd"); |
| 175 | |
| 176 | // Config directory (where to read configs). |
| 177 | addStringEntry("config_directory", "/data/data/com.google.android.gms/files"); |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 178 | |
Than McIntosh | 07f00fd | 2015-04-17 15:10:43 -0400 | [diff] [blame] | 179 | // Full path to 'perf' executable. |
Dehao Chen | 456e371 | 2015-04-30 10:54:26 -0700 | [diff] [blame] | 180 | addStringEntry("perf_path", "/system/xbin/simpleperf"); |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 181 | |
| 182 | // Desired sampling period (passed to perf -c option). Small |
| 183 | // sampling periods can perturb the collected profiles, so enforce |
| 184 | // min/max. |
| 185 | addUnsignedEntry("sampling_period", 500000, 5000, UINT32_MAX); |
| 186 | |
| 187 | // Length of time to collect samples (number of seconds for 'perf |
| 188 | // record -a' run). |
| 189 | addUnsignedEntry("sample_duration", 3, 2, 600); |
| 190 | |
| 191 | // If this parameter is non-zero it will cause perfprofd to |
| 192 | // exit immediately if the build type is not userdebug or eng. |
| 193 | // Currently defaults to 1 (true). |
| 194 | addUnsignedEntry("only_debug_build", 1, 0, 1); |
| 195 | |
Than McIntosh | 07f00fd | 2015-04-17 15:10:43 -0400 | [diff] [blame] | 196 | // If the "mpdecision" service is running at the point we are ready |
| 197 | // to kick off a profiling run, then temporarily disable the service |
| 198 | // and hard-wire all cores on prior to the collection run, provided |
| 199 | // that the duration of the recording is less than or equal to the value of |
| 200 | // 'hardwire_cpus_max_duration'. |
| 201 | addUnsignedEntry("hardwire_cpus", 1, 0, 1); |
| 202 | addUnsignedEntry("hardwire_cpus_max_duration", 5, 1, UINT32_MAX); |
| 203 | |
Than McIntosh | 14d9b4f | 2015-05-21 14:44:34 -0400 | [diff] [blame] | 204 | // Maximum number of unprocessed profiles we can accumulate in the |
| 205 | // destination directory. Once we reach this limit, we continue |
| 206 | // to collect, but we just overwrite the most recent profile. |
| 207 | addUnsignedEntry("max_unprocessed_profiles", 10, 1, UINT32_MAX); |
| 208 | |
Than McIntosh | 07f00fd | 2015-04-17 15:10:43 -0400 | [diff] [blame] | 209 | // If set to 1, pass the -g option when invoking 'perf' (requests |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 210 | // stack traces as opposed to flat profile). |
| 211 | addUnsignedEntry("stack_profile", 0, 0, 1); |
| 212 | |
| 213 | // For unit testing only: if set to 1, emit info messages on config |
| 214 | // file parsing. |
| 215 | addUnsignedEntry("trace_config_read", 0, 0, 1); |
| 216 | } |
| 217 | |
| 218 | void ConfigReader::addUnsignedEntry(const char *key, |
| 219 | unsigned default_value, |
| 220 | unsigned min_value, |
| 221 | unsigned max_value) |
| 222 | { |
| 223 | std::string ks(key); |
| 224 | if (u_entries.find(ks) != u_entries.end() || |
| 225 | s_entries.find(ks) != s_entries.end()) { |
| 226 | W_ALOGE("internal error -- duplicate entry for key %s", key); |
| 227 | exit(9); |
| 228 | } |
| 229 | values vals; |
| 230 | vals.minv = min_value; |
| 231 | vals.maxv = max_value; |
| 232 | u_info[ks] = vals; |
| 233 | u_entries[ks] = default_value; |
| 234 | } |
| 235 | |
| 236 | void ConfigReader::addStringEntry(const char *key, const char *default_value) |
| 237 | { |
| 238 | std::string ks(key); |
| 239 | if (u_entries.find(ks) != u_entries.end() || |
| 240 | s_entries.find(ks) != s_entries.end()) { |
| 241 | W_ALOGE("internal error -- duplicate entry for key %s", key); |
| 242 | exit(9); |
| 243 | } |
Than McIntosh | 07f00fd | 2015-04-17 15:10:43 -0400 | [diff] [blame] | 244 | if (default_value == nullptr) { |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 245 | W_ALOGE("internal error -- bad default value for key %s", key); |
| 246 | exit(9); |
| 247 | } |
| 248 | s_entries[ks] = std::string(default_value); |
| 249 | } |
| 250 | |
Than McIntosh | 07f00fd | 2015-04-17 15:10:43 -0400 | [diff] [blame] | 251 | unsigned ConfigReader::getUnsignedValue(const char *key) const |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 252 | { |
| 253 | std::string ks(key); |
| 254 | auto it = u_entries.find(ks); |
| 255 | assert(it != u_entries.end()); |
| 256 | return it->second; |
| 257 | } |
| 258 | |
Than McIntosh | 07f00fd | 2015-04-17 15:10:43 -0400 | [diff] [blame] | 259 | std::string ConfigReader::getStringValue(const char *key) const |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 260 | { |
| 261 | std::string ks(key); |
| 262 | auto it = s_entries.find(ks); |
| 263 | assert(it != s_entries.end()); |
| 264 | return it->second; |
| 265 | } |
| 266 | |
| 267 | // |
| 268 | // Parse a key=value pair read from the config file. This will issue |
| 269 | // warnings or errors to the system logs if the line can't be |
| 270 | // interpreted properly. |
| 271 | // |
| 272 | void ConfigReader::parseLine(const char *key, |
| 273 | const char *value, |
| 274 | unsigned linecount) |
| 275 | { |
| 276 | assert(key); |
| 277 | assert(value); |
| 278 | |
| 279 | auto uit = u_entries.find(key); |
| 280 | if (uit != u_entries.end()) { |
| 281 | unsigned uvalue = 0; |
Than McIntosh | 07f00fd | 2015-04-17 15:10:43 -0400 | [diff] [blame] | 282 | if (isdigit(value[0]) == 0 || sscanf(value, "%u", &uvalue) != 1) { |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 283 | W_ALOGW("line %d: malformed unsigned value (ignored)", linecount); |
| 284 | } else { |
| 285 | values vals; |
| 286 | auto iit = u_info.find(key); |
| 287 | assert(iit != u_info.end()); |
| 288 | vals = iit->second; |
| 289 | if (uvalue < vals.minv || uvalue > vals.maxv) { |
| 290 | W_ALOGW("line %d: specified value %u for '%s' " |
| 291 | "outside permitted range [%u %u] (ignored)", |
| 292 | linecount, uvalue, key, vals.minv, vals.maxv); |
| 293 | } else { |
| 294 | if (trace_config_read) { |
| 295 | W_ALOGI("option %s set to %u", key, uvalue); |
| 296 | } |
| 297 | uit->second = uvalue; |
| 298 | } |
| 299 | } |
| 300 | trace_config_read = (getUnsignedValue("trace_config_read") != 0); |
| 301 | return; |
| 302 | } |
| 303 | |
| 304 | auto sit = s_entries.find(key); |
| 305 | if (sit != s_entries.end()) { |
| 306 | if (trace_config_read) { |
| 307 | W_ALOGI("option %s set to %s", key, value); |
| 308 | } |
| 309 | sit->second = std::string(value); |
| 310 | return; |
| 311 | } |
| 312 | |
| 313 | W_ALOGW("line %d: unknown option '%s' ignored", linecount, key); |
| 314 | } |
| 315 | |
| 316 | static bool isblank(const std::string &line) |
| 317 | { |
| 318 | for (std::string::const_iterator it = line.begin(); it != line.end(); ++it) |
| 319 | { |
Than McIntosh | 07f00fd | 2015-04-17 15:10:43 -0400 | [diff] [blame] | 320 | if (isspace(*it) == 0) { |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 321 | return false; |
| 322 | } |
| 323 | } |
| 324 | return true; |
| 325 | } |
| 326 | |
Than McIntosh | 14d9b4f | 2015-05-21 14:44:34 -0400 | [diff] [blame] | 327 | void ConfigReader::readFile(bool initial) |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 328 | { |
Dehao Chen | 768b73e | 2015-05-05 15:03:48 -0700 | [diff] [blame] | 329 | FILE *fp = fopen(config_file_path, "r"); |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 330 | if (!fp) { |
Than McIntosh | 14d9b4f | 2015-05-21 14:44:34 -0400 | [diff] [blame] | 331 | if (initial) { |
| 332 | W_ALOGE("unable to open configuration file %s", config_file_path); |
| 333 | } |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 334 | return; |
| 335 | } |
| 336 | |
| 337 | char *linebuf = NULL; |
| 338 | size_t line_length = 0; |
| 339 | for (unsigned linecount = 1; |
| 340 | getline(&linebuf, &line_length, fp) != -1; |
| 341 | ++linecount) { |
| 342 | char *eq = 0; |
| 343 | char *key, *value; |
| 344 | |
| 345 | // comment line? |
| 346 | if (linebuf[0] == '#') { |
| 347 | continue; |
| 348 | } |
| 349 | |
| 350 | // blank line? |
| 351 | if (isblank(linebuf)) { |
| 352 | continue; |
| 353 | } |
| 354 | |
| 355 | // look for X=Y assignment |
| 356 | eq = strchr(linebuf, '='); |
| 357 | if (!eq) { |
| 358 | W_ALOGW("line %d: line malformed (no '=' found)", linecount); |
| 359 | continue; |
| 360 | } |
| 361 | |
| 362 | *eq = '\0'; |
| 363 | key = linebuf; |
| 364 | value = eq+1; |
| 365 | char *ln = strrchr(value, '\n'); |
| 366 | if (ln) { *ln = '\0'; } |
| 367 | |
| 368 | parseLine(key, value, linecount); |
| 369 | } |
| 370 | free(linebuf); |
| 371 | fclose(fp); |
| 372 | } |
| 373 | |
| 374 | // |
| 375 | // Parse command line args. Currently you can supply "-c P" to set |
| 376 | // the path of the config file to P. |
| 377 | // |
| 378 | static void parse_args(int argc, char** argv) |
| 379 | { |
| 380 | int ac; |
| 381 | |
| 382 | for (ac = 1; ac < argc; ++ac) { |
| 383 | if (!strcmp(argv[ac], "-c")) { |
| 384 | if (ac >= argc-1) { |
| 385 | W_ALOGE("malformed command line: -c option requires argument)"); |
| 386 | continue; |
| 387 | } |
| 388 | config_file_path = strdup(argv[ac+1]); |
| 389 | W_ALOGI("config file path set to %s", config_file_path); |
| 390 | ++ac; |
| 391 | } else { |
| 392 | W_ALOGE("malformed command line: unknown option or arg %s)", argv[ac]); |
| 393 | continue; |
| 394 | } |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | // |
| 399 | // Convert a CKPROFILE_RESULT to a string |
| 400 | // |
| 401 | const char *ckprofile_result_to_string(CKPROFILE_RESULT result) |
| 402 | { |
Than McIntosh | 07f00fd | 2015-04-17 15:10:43 -0400 | [diff] [blame] | 403 | switch (result) { |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 404 | case DO_COLLECT_PROFILE: |
| 405 | return "DO_COLLECT_PROFILE"; |
Dehao Chen | 768b73e | 2015-05-05 15:03:48 -0700 | [diff] [blame] | 406 | case DONT_PROFILE_MISSING_CONFIG_DIR: |
| 407 | return "missing config directory"; |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 408 | case DONT_PROFILE_MISSING_SEMAPHORE: |
| 409 | return "missing semaphore file"; |
| 410 | case DONT_PROFILE_MISSING_PERF_EXECUTABLE: |
| 411 | return "missing 'perf' executable"; |
| 412 | case DONT_PROFILE_RUNNING_IN_EMULATOR: |
| 413 | return "running in emulator"; |
| 414 | default: return "unknown"; |
| 415 | } |
| 416 | return "notreached"; |
| 417 | } |
| 418 | |
| 419 | // |
| 420 | // Convert a PROFILE_RESULT to a string |
| 421 | // |
| 422 | const char *profile_result_to_string(PROFILE_RESULT result) |
| 423 | { |
| 424 | switch(result) { |
| 425 | case OK_PROFILE_COLLECTION: |
| 426 | return "profile collection succeeded"; |
| 427 | case ERR_FORK_FAILED: |
| 428 | return "fork() system call failed"; |
| 429 | case ERR_PERF_RECORD_FAILED: |
| 430 | return "perf record returned bad exit status"; |
| 431 | case ERR_PERF_ENCODE_FAILED: |
| 432 | return "failure encoding perf.data to protobuf"; |
| 433 | case ERR_OPEN_ENCODED_FILE_FAILED: |
| 434 | return "failed to open encoded perf file"; |
| 435 | case ERR_WRITE_ENCODED_FILE_FAILED: |
| 436 | return "write to encoded perf file failed"; |
| 437 | default: return "unknown"; |
| 438 | } |
| 439 | return "notreached"; |
| 440 | } |
| 441 | |
| 442 | // |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 443 | // Check to see whether we should perform a profile collection |
| 444 | // |
| 445 | static CKPROFILE_RESULT check_profiling_enabled(ConfigReader &config) |
| 446 | { |
| 447 | // |
| 448 | // Profile collection in the emulator doesn't make sense |
| 449 | // |
| 450 | assert(running_in_emulator != -1); |
| 451 | if (running_in_emulator) { |
| 452 | return DONT_PROFILE_RUNNING_IN_EMULATOR; |
| 453 | } |
| 454 | |
| 455 | // |
Dehao Chen | 768b73e | 2015-05-05 15:03:48 -0700 | [diff] [blame] | 456 | // Check for existence of semaphore file in config directory |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 457 | // |
Dehao Chen | 768b73e | 2015-05-05 15:03:48 -0700 | [diff] [blame] | 458 | if (access(config.getStringValue("config_directory").c_str(), F_OK) == -1) { |
| 459 | W_ALOGW("unable to open config directory %s: (%s)", |
| 460 | config.getStringValue("config_directory").c_str(), strerror(errno)); |
| 461 | return DONT_PROFILE_MISSING_CONFIG_DIR; |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 462 | } |
| 463 | |
Dehao Chen | 768b73e | 2015-05-05 15:03:48 -0700 | [diff] [blame] | 464 | |
| 465 | // Check for existence of semaphore file |
| 466 | std::string semaphore_filepath = config.getStringValue("config_directory") |
| 467 | + "/" + SEMAPHORE_FILENAME; |
| 468 | if (access(semaphore_filepath.c_str(), F_OK) == -1) { |
| 469 | return DONT_PROFILE_MISSING_SEMAPHORE; |
| 470 | } |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 471 | |
Than McIntosh | 07f00fd | 2015-04-17 15:10:43 -0400 | [diff] [blame] | 472 | // Check for existence of simpleperf/perf executable |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 473 | std::string pp = config.getStringValue("perf_path"); |
| 474 | if (access(pp.c_str(), R_OK|X_OK) == -1) { |
| 475 | W_ALOGW("unable to access/execute %s", pp.c_str()); |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 476 | return DONT_PROFILE_MISSING_PERF_EXECUTABLE; |
| 477 | } |
| 478 | |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 479 | // |
| 480 | // We are good to go |
| 481 | // |
| 482 | return DO_COLLECT_PROFILE; |
| 483 | } |
| 484 | |
Than McIntosh | 2297612 | 2015-06-10 11:47:01 -0400 | [diff] [blame] | 485 | static void annotate_encoded_perf_profile(wireless_android_play_playlog::AndroidPerfProfile *profile) |
| 486 | { |
| 487 | // |
| 488 | // Load average as reported by the kernel |
| 489 | // |
| 490 | std::string load; |
| 491 | double fload = 0.0; |
| 492 | if (android::base::ReadFileToString("/proc/loadavg", &load) && |
| 493 | sscanf(load.c_str(), "%lf", &fload) == 1) { |
| 494 | int iload = static_cast<int>(fload * 100.0); |
| 495 | profile->set_sys_load_average(iload); |
| 496 | } else { |
| 497 | W_ALOGE("Failed to read or scan /proc/loadavg (%s)", strerror(errno)); |
| 498 | } |
| 499 | |
| 500 | // |
| 501 | // Examine the contents of wake_unlock to determine whether the |
| 502 | // device display is on or off. NB: is this really the only way to |
| 503 | // determine this info? |
| 504 | // |
| 505 | std::string disp; |
| 506 | if (android::base::ReadFileToString("/sys/power/wake_unlock", &disp)) { |
| 507 | bool ison = (strstr(disp.c_str(), "PowerManagerService.Display") == 0); |
| 508 | profile->set_display_on(ison); |
| 509 | } else { |
| 510 | W_ALOGE("Failed to read /sys/power/wake_unlock (%s)", strerror(errno)); |
| 511 | } |
| 512 | } |
| 513 | |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 514 | inline char* string_as_array(std::string* str) { |
| 515 | return str->empty() ? NULL : &*str->begin(); |
| 516 | } |
| 517 | |
| 518 | PROFILE_RESULT encode_to_proto(const std::string &data_file_path, |
Dehao Chen | 5c41562 | 2015-05-07 13:16:35 -0700 | [diff] [blame] | 519 | const char *encoded_file_path) |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 520 | { |
| 521 | // |
| 522 | // Open and read perf.data file |
| 523 | // |
| 524 | const wireless_android_play_playlog::AndroidPerfProfile &encodedProfile = |
| 525 | wireless_android_logging_awp::RawPerfDataToAndroidPerfProfile(data_file_path); |
| 526 | |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 527 | // |
| 528 | // Issue error if no samples |
| 529 | // |
| 530 | if (encodedProfile.programs().size() == 0) { |
| 531 | return ERR_PERF_ENCODE_FAILED; |
| 532 | } |
| 533 | |
Than McIntosh | 2297612 | 2015-06-10 11:47:01 -0400 | [diff] [blame] | 534 | // All of the info in 'encodedProfile' is derived from the perf.data file; |
| 535 | // here we tack display status and system load. |
| 536 | wireless_android_play_playlog::AndroidPerfProfile &prof = |
| 537 | const_cast<wireless_android_play_playlog::AndroidPerfProfile&> |
| 538 | (encodedProfile); |
| 539 | annotate_encoded_perf_profile(&prof); |
| 540 | |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 541 | // |
| 542 | // Serialize protobuf to array |
| 543 | // |
| 544 | int size = encodedProfile.ByteSize(); |
| 545 | std::string data; |
| 546 | data.resize(size); |
| 547 | ::google::protobuf::uint8* dtarget = |
| 548 | reinterpret_cast<::google::protobuf::uint8*>(string_as_array(&data)); |
| 549 | encodedProfile.SerializeWithCachedSizesToArray(dtarget); |
| 550 | |
| 551 | // |
| 552 | // Open file and write encoded data to it |
| 553 | // |
Dehao Chen | 5c41562 | 2015-05-07 13:16:35 -0700 | [diff] [blame] | 554 | FILE *fp = fopen(encoded_file_path, "w"); |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 555 | if (!fp) { |
| 556 | return ERR_OPEN_ENCODED_FILE_FAILED; |
| 557 | } |
| 558 | size_t fsiz = size; |
| 559 | if (fwrite(dtarget, fsiz, 1, fp) != 1) { |
| 560 | fclose(fp); |
| 561 | return ERR_WRITE_ENCODED_FILE_FAILED; |
| 562 | } |
| 563 | fclose(fp); |
Dehao Chen | 5c41562 | 2015-05-07 13:16:35 -0700 | [diff] [blame] | 564 | chmod(encoded_file_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH); |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 565 | |
| 566 | return OK_PROFILE_COLLECTION; |
| 567 | } |
| 568 | |
| 569 | // |
Than McIntosh | 07f00fd | 2015-04-17 15:10:43 -0400 | [diff] [blame] | 570 | // Invoke "perf record". Return value is OK_PROFILE_COLLECTION for |
| 571 | // success, or some other error code if something went wrong. |
| 572 | // |
| 573 | static PROFILE_RESULT invoke_perf(const std::string &perf_path, |
| 574 | unsigned sampling_period, |
| 575 | const char *stack_profile_opt, |
| 576 | unsigned duration, |
| 577 | const std::string &data_file_path, |
| 578 | const std::string &perf_stderr_path) |
| 579 | { |
| 580 | pid_t pid = fork(); |
| 581 | |
| 582 | if (pid == -1) { |
| 583 | return ERR_FORK_FAILED; |
| 584 | } |
| 585 | |
| 586 | if (pid == 0) { |
| 587 | // child |
| 588 | |
| 589 | // Open file to receive stderr/stdout from perf |
| 590 | FILE *efp = fopen(perf_stderr_path.c_str(), "w"); |
| 591 | if (efp) { |
| 592 | dup2(fileno(efp), STDERR_FILENO); |
| 593 | dup2(fileno(efp), STDOUT_FILENO); |
| 594 | } else { |
| 595 | W_ALOGW("unable to open %s for writing", perf_stderr_path.c_str()); |
| 596 | } |
| 597 | |
| 598 | // marshall arguments |
| 599 | constexpr unsigned max_args = 12; |
| 600 | const char *argv[max_args]; |
| 601 | unsigned slot = 0; |
| 602 | argv[slot++] = perf_path.c_str(); |
| 603 | argv[slot++] = "record"; |
| 604 | |
| 605 | // -o perf.data |
| 606 | argv[slot++] = "-o"; |
| 607 | argv[slot++] = data_file_path.c_str(); |
| 608 | |
| 609 | // -c N |
| 610 | argv[slot++] = "-c"; |
Dehao Chen | 5c41562 | 2015-05-07 13:16:35 -0700 | [diff] [blame] | 611 | std::string p_str = android::base::StringPrintf("%u", sampling_period); |
| 612 | argv[slot++] = p_str.c_str(); |
Than McIntosh | 07f00fd | 2015-04-17 15:10:43 -0400 | [diff] [blame] | 613 | |
| 614 | // -g if desired |
| 615 | if (stack_profile_opt) |
| 616 | argv[slot++] = stack_profile_opt; |
| 617 | |
| 618 | // system wide profiling |
| 619 | argv[slot++] = "-a"; |
| 620 | |
| 621 | // sleep <duration> |
| 622 | argv[slot++] = "/system/bin/sleep"; |
Dehao Chen | 5c41562 | 2015-05-07 13:16:35 -0700 | [diff] [blame] | 623 | std::string d_str = android::base::StringPrintf("%u", duration); |
| 624 | argv[slot++] = d_str.c_str(); |
Than McIntosh | 07f00fd | 2015-04-17 15:10:43 -0400 | [diff] [blame] | 625 | |
| 626 | // terminator |
| 627 | argv[slot++] = nullptr; |
| 628 | assert(slot < max_args); |
| 629 | |
| 630 | // record the final command line in the error output file for |
| 631 | // posterity/debugging purposes |
| 632 | fprintf(stderr, "perf invocation (pid=%d):\n", getpid()); |
| 633 | for (unsigned i = 0; argv[i] != nullptr; ++i) { |
| 634 | fprintf(stderr, "%s%s", i ? " " : "", argv[i]); |
| 635 | } |
| 636 | fprintf(stderr, "\n"); |
| 637 | |
| 638 | // exec |
| 639 | execvp(argv[0], (char * const *)argv); |
| 640 | fprintf(stderr, "exec failed: %s\n", strerror(errno)); |
| 641 | exit(1); |
| 642 | |
| 643 | } else { |
| 644 | // parent |
| 645 | int st = 0; |
| 646 | pid_t reaped = TEMP_FAILURE_RETRY(waitpid(pid, &st, 0)); |
| 647 | |
| 648 | if (reaped == -1) { |
| 649 | W_ALOGW("waitpid failed: %s", strerror(errno)); |
| 650 | } else if (WIFSIGNALED(st)) { |
| 651 | W_ALOGW("perf killed by signal %d", WTERMSIG(st)); |
| 652 | } else if (WEXITSTATUS(st) != 0) { |
| 653 | W_ALOGW("perf bad exit status %d", WEXITSTATUS(st)); |
| 654 | } else { |
| 655 | return OK_PROFILE_COLLECTION; |
| 656 | } |
| 657 | } |
| 658 | |
| 659 | return ERR_PERF_RECORD_FAILED; |
| 660 | } |
| 661 | |
| 662 | // |
Dehao Chen | 5c41562 | 2015-05-07 13:16:35 -0700 | [diff] [blame] | 663 | // Remove all files in the destination directory during initialization |
| 664 | // |
| 665 | static void cleanup_destination_dir(const ConfigReader &config) |
| 666 | { |
| 667 | std::string dest_dir = config.getStringValue("destination_directory"); |
| 668 | DIR* dir = opendir(dest_dir.c_str()); |
| 669 | if (dir != NULL) { |
| 670 | struct dirent* e; |
| 671 | while ((e = readdir(dir)) != 0) { |
| 672 | if (e->d_name[0] != '.') { |
| 673 | std::string file_path = dest_dir + "/" + e->d_name; |
| 674 | remove(file_path.c_str()); |
| 675 | } |
| 676 | } |
| 677 | closedir(dir); |
Than McIntosh | 14d9b4f | 2015-05-21 14:44:34 -0400 | [diff] [blame] | 678 | } else { |
| 679 | W_ALOGW("unable to open destination dir %s for cleanup", |
| 680 | dest_dir.c_str()); |
Dehao Chen | 5c41562 | 2015-05-07 13:16:35 -0700 | [diff] [blame] | 681 | } |
| 682 | } |
| 683 | |
| 684 | // |
| 685 | // Post-processes after profile is collected and converted to protobuf. |
| 686 | // * GMS core stores processed file sequence numbers in |
| 687 | // /data/data/com.google.android.gms/files/perfprofd_processed.txt |
| 688 | // * Update /data/misc/perfprofd/perfprofd_produced.txt to remove the sequence |
| 689 | // numbers that have been processed and append the current seq number |
| 690 | // Returns true if the current_seq should increment. |
| 691 | // |
| 692 | static bool post_process(const ConfigReader &config, int current_seq) |
| 693 | { |
| 694 | std::string dest_dir = config.getStringValue("destination_directory"); |
| 695 | std::string processed_file_path = |
| 696 | config.getStringValue("config_directory") + "/" + PROCESSED_FILENAME; |
| 697 | std::string produced_file_path = dest_dir + "/" + PRODUCED_FILENAME; |
| 698 | |
| 699 | |
| 700 | std::set<int> processed; |
| 701 | FILE *fp = fopen(processed_file_path.c_str(), "r"); |
| 702 | if (fp != NULL) { |
| 703 | int seq; |
| 704 | while(fscanf(fp, "%d\n", &seq) > 0) { |
| 705 | if (remove(android::base::StringPrintf( |
| 706 | "%s/perf.data.encoded.%d", dest_dir.c_str(),seq).c_str()) == 0) { |
| 707 | processed.insert(seq); |
| 708 | } |
| 709 | } |
| 710 | fclose(fp); |
| 711 | } |
| 712 | |
| 713 | std::set<int> produced; |
| 714 | fp = fopen(produced_file_path.c_str(), "r"); |
| 715 | if (fp != NULL) { |
| 716 | int seq; |
| 717 | while(fscanf(fp, "%d\n", &seq) > 0) { |
| 718 | if (processed.find(seq) == processed.end()) { |
| 719 | produced.insert(seq); |
| 720 | } |
| 721 | } |
| 722 | fclose(fp); |
| 723 | } |
| 724 | |
Than McIntosh | 14d9b4f | 2015-05-21 14:44:34 -0400 | [diff] [blame] | 725 | unsigned maxLive = config.getUnsignedValue("max_unprocessed_profiles"); |
| 726 | if (produced.size() >= maxLive) { |
Dehao Chen | 5c41562 | 2015-05-07 13:16:35 -0700 | [diff] [blame] | 727 | return false; |
| 728 | } |
| 729 | |
| 730 | produced.insert(current_seq); |
| 731 | fp = fopen(produced_file_path.c_str(), "w"); |
| 732 | if (fp == NULL) { |
| 733 | W_ALOGW("Cannot write %s", produced_file_path.c_str()); |
| 734 | return false; |
| 735 | } |
| 736 | for (std::set<int>::const_iterator iter = produced.begin(); |
| 737 | iter != produced.end(); ++iter) { |
| 738 | fprintf(fp, "%d\n", *iter); |
| 739 | } |
| 740 | fclose(fp); |
| 741 | chmod(produced_file_path.c_str(), |
| 742 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH); |
| 743 | return true; |
| 744 | } |
| 745 | |
| 746 | // |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 747 | // Collect a perf profile. Steps for this operation are: |
| 748 | // - kick off 'perf record' |
| 749 | // - read perf.data, convert to protocol buf |
| 750 | // |
Dehao Chen | 5c41562 | 2015-05-07 13:16:35 -0700 | [diff] [blame] | 751 | static PROFILE_RESULT collect_profile(const ConfigReader &config, int seq) |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 752 | { |
| 753 | // |
| 754 | // Form perf.data file name, perf error output file name |
| 755 | // |
| 756 | std::string destdir = config.getStringValue("destination_directory"); |
| 757 | std::string data_file_path(destdir); |
| 758 | data_file_path += "/"; |
| 759 | data_file_path += PERF_OUTPUT; |
| 760 | std::string perf_stderr_path(destdir); |
| 761 | perf_stderr_path += "/perferr.txt"; |
| 762 | |
| 763 | // |
| 764 | // Remove any existing perf.data file -- if we don't do this, perf |
| 765 | // will rename the old file and we'll have extra cruft lying around. |
| 766 | // |
| 767 | struct stat statb; |
| 768 | if (stat(data_file_path.c_str(), &statb) == 0) { // if file exists... |
| 769 | if (unlink(data_file_path.c_str())) { // then try to remove |
| 770 | W_ALOGW("unable to unlink previous perf.data file"); |
| 771 | } |
| 772 | } |
| 773 | |
| 774 | // |
Than McIntosh | 07f00fd | 2015-04-17 15:10:43 -0400 | [diff] [blame] | 775 | // The "mpdecision" daemon can cause problems for profile |
| 776 | // collection: if it decides to online a CPU partway through the |
| 777 | // 'perf record' run, the activity on that CPU will be invisible to |
| 778 | // perf, and if it offlines a CPU during the recording this can |
| 779 | // sometimes leave the PMU in an unusable state (dmesg errors of the |
| 780 | // form "perfevents: unable to request IRQXXX for ..."). To avoid |
| 781 | // these issues, if "mpdecision" is running the helper below will |
| 782 | // stop the service and then online all available CPUs. The object |
| 783 | // destructor (invoked when this routine terminates) will then |
| 784 | // restart the service again when needed. |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 785 | // |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 786 | unsigned duration = config.getUnsignedValue("sample_duration"); |
Than McIntosh | 07f00fd | 2015-04-17 15:10:43 -0400 | [diff] [blame] | 787 | unsigned hardwire = config.getUnsignedValue("hardwire_cpus"); |
| 788 | unsigned max_duration = config.getUnsignedValue("hardwire_cpus_max_duration"); |
| 789 | bool take_action = (hardwire && duration <= max_duration); |
| 790 | HardwireCpuHelper helper(take_action); |
| 791 | |
| 792 | // |
| 793 | // Invoke perf |
| 794 | // |
| 795 | const char *stack_profile_opt = |
| 796 | (config.getUnsignedValue("stack_profile") != 0 ? "-g" : nullptr); |
| 797 | std::string perf_path = config.getStringValue("perf_path"); |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 798 | unsigned period = config.getUnsignedValue("sampling_period"); |
Than McIntosh | 07f00fd | 2015-04-17 15:10:43 -0400 | [diff] [blame] | 799 | |
| 800 | PROFILE_RESULT ret = invoke_perf(perf_path.c_str(), |
| 801 | period, |
| 802 | stack_profile_opt, |
| 803 | duration, |
| 804 | data_file_path, |
| 805 | perf_stderr_path); |
| 806 | if (ret != OK_PROFILE_COLLECTION) { |
| 807 | return ret; |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 808 | } |
| 809 | |
| 810 | // |
| 811 | // Read the resulting perf.data file, encode into protocol buffer, then write |
Than McIntosh | 07f00fd | 2015-04-17 15:10:43 -0400 | [diff] [blame] | 812 | // the result to the file perf.data.encoded |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 813 | // |
Dehao Chen | 5c41562 | 2015-05-07 13:16:35 -0700 | [diff] [blame] | 814 | std::string path = android::base::StringPrintf( |
| 815 | "%s.encoded.%d", data_file_path.c_str(), seq); |
| 816 | return encode_to_proto(data_file_path, path.c_str()); |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 817 | } |
| 818 | |
| 819 | // |
Than McIntosh | 14d9b4f | 2015-05-21 14:44:34 -0400 | [diff] [blame] | 820 | // SIGHUP handler. Sending SIGHUP to the daemon can be used to break it |
| 821 | // out of a sleep() call so as to trigger a new collection (debugging) |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 822 | // |
| 823 | static void sig_hup(int /* signum */) |
| 824 | { |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 825 | } |
| 826 | |
| 827 | // |
| 828 | // Assuming that we want to collect a profile every N seconds, |
| 829 | // randomly partition N into two sub-intervals. |
| 830 | // |
| 831 | static void determine_before_after(unsigned &sleep_before_collect, |
| 832 | unsigned &sleep_after_collect, |
| 833 | unsigned collection_interval) |
| 834 | { |
| 835 | double frac = erand48(random_seed); |
| 836 | sleep_before_collect = (unsigned) (((double)collection_interval) * frac); |
| 837 | assert(sleep_before_collect <= collection_interval); |
| 838 | sleep_after_collect = collection_interval - sleep_before_collect; |
| 839 | } |
| 840 | |
| 841 | // |
| 842 | // Set random number generator seed |
| 843 | // |
| 844 | static void set_seed(ConfigReader &config) |
| 845 | { |
| 846 | unsigned seed = 0; |
| 847 | unsigned use_fixed_seed = config.getUnsignedValue("use_fixed_seed"); |
| 848 | if (use_fixed_seed) { |
| 849 | // |
| 850 | // Use fixed user-specified seed |
| 851 | // |
| 852 | seed = use_fixed_seed; |
| 853 | } else { |
| 854 | // |
| 855 | // Randomized seed |
| 856 | // |
| 857 | seed = arc4random(); |
| 858 | } |
| 859 | W_ALOGI("random seed set to %u", seed); |
| 860 | // Distribute the 32-bit seed into the three 16-bit array |
| 861 | // elements. The specific values being written do not especially |
| 862 | // matter as long as we are setting them to something based on the seed. |
| 863 | random_seed[0] = seed & 0xffff; |
| 864 | random_seed[1] = (seed >> 16); |
| 865 | random_seed[2] = (random_seed[0] ^ random_seed[1]); |
| 866 | } |
| 867 | |
| 868 | // |
| 869 | // Initialization |
| 870 | // |
| 871 | static void init(ConfigReader &config) |
| 872 | { |
Than McIntosh | 14d9b4f | 2015-05-21 14:44:34 -0400 | [diff] [blame] | 873 | config.readFile(true); |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 874 | set_seed(config); |
Dehao Chen | 5c41562 | 2015-05-07 13:16:35 -0700 | [diff] [blame] | 875 | cleanup_destination_dir(config); |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 876 | |
| 877 | char propBuf[PROPERTY_VALUE_MAX]; |
| 878 | propBuf[0] = '\0'; |
| 879 | property_get("ro.kernel.qemu", propBuf, ""); |
| 880 | running_in_emulator = (propBuf[0] == '1'); |
| 881 | property_get("ro.debuggable", propBuf, ""); |
| 882 | is_debug_build = (propBuf[0] == '1'); |
| 883 | |
| 884 | signal(SIGHUP, sig_hup); |
| 885 | } |
| 886 | |
| 887 | // |
| 888 | // Main routine: |
| 889 | // 1. parse cmd line args |
| 890 | // 2. read config file |
| 891 | // 3. loop: { |
| 892 | // sleep for a while |
| 893 | // perform a profile collection |
| 894 | // } |
| 895 | // |
| 896 | int perfprofd_main(int argc, char** argv) |
| 897 | { |
| 898 | ConfigReader config; |
| 899 | |
| 900 | W_ALOGI("starting Android Wide Profiling daemon"); |
| 901 | |
| 902 | parse_args(argc, argv); |
| 903 | init(config); |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 904 | |
| 905 | // Early exit if we're not supposed to run on this build flavor |
| 906 | if (is_debug_build != 1 && |
| 907 | config.getUnsignedValue("only_debug_build") == 1) { |
| 908 | W_ALOGI("early exit due to inappropriate build type"); |
| 909 | return 0; |
| 910 | } |
| 911 | |
| 912 | unsigned iterations = 0; |
Dehao Chen | 5c41562 | 2015-05-07 13:16:35 -0700 | [diff] [blame] | 913 | int seq = 0; |
Than McIntosh | 07f00fd | 2015-04-17 15:10:43 -0400 | [diff] [blame] | 914 | while(config.getUnsignedValue("main_loop_iterations") == 0 || |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 915 | iterations < config.getUnsignedValue("main_loop_iterations")) { |
| 916 | |
| 917 | // Figure out where in the collection interval we're going to actually |
| 918 | // run perf |
| 919 | unsigned sleep_before_collect = 0; |
| 920 | unsigned sleep_after_collect = 0; |
| 921 | determine_before_after(sleep_before_collect, sleep_after_collect, |
| 922 | config.getUnsignedValue("collection_interval")); |
| 923 | perfprofd_sleep(sleep_before_collect); |
| 924 | |
Than McIntosh | 14d9b4f | 2015-05-21 14:44:34 -0400 | [diff] [blame] | 925 | // Reread config file -- the uploader may have rewritten it as a result |
| 926 | // of a gservices change |
| 927 | config.readFile(false); |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 928 | |
| 929 | // Check for profiling enabled... |
| 930 | CKPROFILE_RESULT ckresult = check_profiling_enabled(config); |
| 931 | if (ckresult != DO_COLLECT_PROFILE) { |
| 932 | W_ALOGI("profile collection skipped (%s)", |
| 933 | ckprofile_result_to_string(ckresult)); |
| 934 | } else { |
| 935 | // Kick off the profiling run... |
| 936 | W_ALOGI("initiating profile collection"); |
Dehao Chen | 5c41562 | 2015-05-07 13:16:35 -0700 | [diff] [blame] | 937 | PROFILE_RESULT result = collect_profile(config, seq); |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 938 | if (result != OK_PROFILE_COLLECTION) { |
| 939 | W_ALOGI("profile collection failed (%s)", |
| 940 | profile_result_to_string(result)); |
| 941 | } else { |
Dehao Chen | 5c41562 | 2015-05-07 13:16:35 -0700 | [diff] [blame] | 942 | if (post_process(config, seq)) { |
| 943 | seq++; |
| 944 | } |
Than McIntosh | 7e2f4e9 | 2015-03-05 11:05:02 -0500 | [diff] [blame] | 945 | W_ALOGI("profile collection complete"); |
| 946 | } |
| 947 | } |
| 948 | perfprofd_sleep(sleep_after_collect); |
| 949 | iterations += 1; |
| 950 | } |
| 951 | |
| 952 | W_ALOGI("finishing Android Wide Profiling daemon"); |
| 953 | return 0; |
| 954 | } |