1 /* 2 * Copyright (c) 2008, The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google, Inc. nor the names of its contributors 15 * may be used to endorse or promote products derived from this 16 * software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 22 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 25 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 28 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <ctype.h> 33 #include <dirent.h> 34 #include <grp.h> 35 #include <pwd.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include <sys/types.h> 40 #include <unistd.h> 41 42 #include <cutils/sched_policy.h> 43 44 struct cpu_info { 45 long unsigned utime, ntime, stime, itime; 46 long unsigned iowtime, irqtime, sirqtime; 47 }; 48 49 #define PROC_NAME_LEN 64 50 #define THREAD_NAME_LEN 32 51 52 struct proc_info { 53 struct proc_info *next; 54 pid_t pid; 55 pid_t tid; 56 uid_t uid; 57 gid_t gid; 58 char name[PROC_NAME_LEN]; 59 char tname[THREAD_NAME_LEN]; 60 char state; 61 long unsigned utime; 62 long unsigned stime; 63 long unsigned delta_utime; 64 long unsigned delta_stime; 65 long unsigned delta_time; 66 long vss; 67 long rss; 68 int num_threads; 69 char policy[32]; 70 }; 71 72 struct proc_list { 73 struct proc_info **array; 74 int size; 75 }; 76 77 #define die(...) { fprintf(stderr, __VA_ARGS__); exit(EXIT_FAILURE); } 78 79 #define INIT_PROCS 50 80 #define THREAD_MULT 8 81 static struct proc_info **old_procs, **new_procs; 82 static int num_old_procs, num_new_procs; 83 static struct proc_info *free_procs; 84 static int num_used_procs, num_free_procs; 85 86 static int max_procs, delay, iterations, threads; 87 88 static struct cpu_info old_cpu, new_cpu; 89 90 static struct proc_info *alloc_proc(void); 91 static void free_proc(struct proc_info *proc); 92 static void read_procs(void); 93 static int read_stat(char *filename, struct proc_info *proc); 94 static void read_policy(int pid, struct proc_info *proc); 95 static void add_proc(int proc_num, struct proc_info *proc); 96 static int read_cmdline(char *filename, struct proc_info *proc); 97 static int read_status(char *filename, struct proc_info *proc); 98 static void print_procs(void); 99 static struct proc_info *find_old_proc(pid_t pid, pid_t tid); 100 static void free_old_procs(void); 101 static int (*proc_cmp)(const void *a, const void *b); 102 static int proc_cpu_cmp(const void *a, const void *b); 103 static int proc_vss_cmp(const void *a, const void *b); 104 static int proc_rss_cmp(const void *a, const void *b); 105 static int proc_thr_cmp(const void *a, const void *b); 106 static int numcmp(long long a, long long b); 107 static void usage(char *cmd); 108 109 int top_main(int argc, char *argv[]) { 110 int i; 111 112 num_used_procs = num_free_procs = 0; 113 114 max_procs = 0; 115 delay = 3; 116 iterations = -1; 117 proc_cmp = &proc_cpu_cmp; 118 for (i = 1; i < argc; i++) { 119 if (!strcmp(argv[i], "-m")) { 120 if (i + 1 >= argc) { 121 fprintf(stderr, "Option -m expects an argument.\n"); 122 usage(argv[0]); 123 exit(EXIT_FAILURE); 124 } 125 max_procs = atoi(argv[++i]); 126 continue; 127 } 128 if (!strcmp(argv[i], "-n")) { 129 if (i + 1 >= argc) { 130 fprintf(stderr, "Option -n expects an argument.\n"); 131 usage(argv[0]); 132 exit(EXIT_FAILURE); 133 } 134 iterations = atoi(argv[++i]); 135 continue; 136 } 137 if (!strcmp(argv[i], "-d")) { 138 if (i + 1 >= argc) { 139 fprintf(stderr, "Option -d expects an argument.\n"); 140 usage(argv[0]); 141 exit(EXIT_FAILURE); 142 } 143 delay = atoi(argv[++i]); 144 continue; 145 } 146 if (!strcmp(argv[i], "-s")) { 147 if (i + 1 >= argc) { 148 fprintf(stderr, "Option -s expects an argument.\n"); 149 usage(argv[0]); 150 exit(EXIT_FAILURE); 151 } 152 ++i; 153 if (!strcmp(argv[i], "cpu")) { proc_cmp = &proc_cpu_cmp; continue; } 154 if (!strcmp(argv[i], "vss")) { proc_cmp = &proc_vss_cmp; continue; } 155 if (!strcmp(argv[i], "rss")) { proc_cmp = &proc_rss_cmp; continue; } 156 if (!strcmp(argv[i], "thr")) { proc_cmp = &proc_thr_cmp; continue; } 157 fprintf(stderr, "Invalid argument \"%s\" for option -s.\n", argv[i]); 158 exit(EXIT_FAILURE); 159 } 160 if (!strcmp(argv[i], "-t")) { threads = 1; continue; } 161 if (!strcmp(argv[i], "-h")) { 162 usage(argv[0]); 163 exit(EXIT_SUCCESS); 164 } 165 fprintf(stderr, "Invalid argument \"%s\".\n", argv[i]); 166 usage(argv[0]); 167 exit(EXIT_FAILURE); 168 } 169 170 if (threads && proc_cmp == &proc_thr_cmp) { 171 fprintf(stderr, "Sorting by threads per thread makes no sense!\n"); 172 exit(EXIT_FAILURE); 173 } 174 175 free_procs = NULL; 176 177 num_new_procs = num_old_procs = 0; 178 new_procs = old_procs = NULL; 179 180 read_procs(); 181 while ((iterations == -1) || (iterations-- > 0)) { 182 old_procs = new_procs; 183 num_old_procs = num_new_procs; 184 memcpy(&old_cpu, &new_cpu, sizeof(old_cpu)); 185 sleep(delay); 186 read_procs(); 187 print_procs(); 188 free_old_procs(); 189 } 190 191 return 0; 192 } 193 194 static struct proc_info *alloc_proc(void) { 195 struct proc_info *proc; 196 197 if (free_procs) { 198 proc = free_procs; 199 free_procs = free_procs->next; 200 num_free_procs--; 201 } else { 202 proc = malloc(sizeof(*proc)); 203 if (!proc) die("Could not allocate struct process_info.\n"); 204 } 205 206 num_used_procs++; 207 208 return proc; 209 } 210 211 static void free_proc(struct proc_info *proc) { 212 proc->next = free_procs; 213 free_procs = proc; 214 215 num_used_procs--; 216 num_free_procs++; 217 } 218 219 #define MAX_LINE 256 220 221 static void read_procs(void) { 222 DIR *proc_dir, *task_dir; 223 struct dirent *pid_dir, *tid_dir; 224 char filename[64]; 225 FILE *file; 226 int proc_num; 227 struct proc_info *proc; 228 pid_t pid, tid; 229 230 int i; 231 232 proc_dir = opendir("/proc"); 233 if (!proc_dir) die("Could not open /proc.\n"); 234 235 new_procs = calloc(INIT_PROCS * (threads ? THREAD_MULT : 1), sizeof(struct proc_info *)); 236 num_new_procs = INIT_PROCS * (threads ? THREAD_MULT : 1); 237 238 file = fopen("/proc/stat", "r"); 239 if (!file) die("Could not open /proc/stat.\n"); 240 fscanf(file, "cpu %lu %lu %lu %lu %lu %lu %lu", &new_cpu.utime, &new_cpu.ntime, &new_cpu.stime, 241 &new_cpu.itime, &new_cpu.iowtime, &new_cpu.irqtime, &new_cpu.sirqtime); 242 fclose(file); 243 244 proc_num = 0; 245 while ((pid_dir = readdir(proc_dir))) { 246 if (!isdigit(pid_dir->d_name[0])) 247 continue; 248 249 pid = atoi(pid_dir->d_name); 250 251 struct proc_info cur_proc; 252 253 if (!threads) { 254 proc = alloc_proc(); 255 256 proc->pid = proc->tid = pid; 257 258 sprintf(filename, "/proc/%d/stat", pid); 259 read_stat(filename, proc); 260 261 sprintf(filename, "/proc/%d/cmdline", pid); 262 read_cmdline(filename, proc); 263 264 sprintf(filename, "/proc/%d/status", pid); 265 read_status(filename, proc); 266 267 read_policy(pid, proc); 268 269 proc->num_threads = 0; 270 } else { 271 sprintf(filename, "/proc/%d/cmdline", pid); 272 read_cmdline(filename, &cur_proc); 273 274 sprintf(filename, "/proc/%d/status", pid); 275 read_status(filename, &cur_proc); 276 277 proc = NULL; 278 } 279 280 sprintf(filename, "/proc/%d/task", pid); 281 task_dir = opendir(filename); 282 if (!task_dir) continue; 283 284 while ((tid_dir = readdir(task_dir))) { 285 if (!isdigit(tid_dir->d_name[0])) 286 continue; 287 288 if (threads) { 289 tid = atoi(tid_dir->d_name); 290 291 proc = alloc_proc(); 292 293 proc->pid = pid; proc->tid = tid; 294 295 sprintf(filename, "/proc/%d/task/%d/stat", pid, tid); 296 read_stat(filename, proc); 297 298 read_policy(tid, proc); 299 300 strcpy(proc->name, cur_proc.name); 301 proc->uid = cur_proc.uid; 302 proc->gid = cur_proc.gid; 303 304 add_proc(proc_num++, proc); 305 } else { 306 proc->num_threads++; 307 } 308 } 309 310 closedir(task_dir); 311 312 if (!threads) 313 add_proc(proc_num++, proc); 314 } 315 316 for (i = proc_num; i < num_new_procs; i++) 317 new_procs[i] = NULL; 318 319 closedir(proc_dir); 320 } 321 322 static int read_stat(char *filename, struct proc_info *proc) { 323 FILE *file; 324 char buf[MAX_LINE], *open_paren, *close_paren; 325 int res, idx; 326 327 file = fopen(filename, "r"); 328 if (!file) return 1; 329 fgets(buf, MAX_LINE, file); 330 fclose(file); 331 332 /* Split at first '(' and last ')' to get process name. */ 333 open_paren = strchr(buf, '('); 334 close_paren = strrchr(buf, ')'); 335 if (!open_paren || !close_paren) return 1; 336 337 *open_paren = *close_paren = '\0'; 338 strncpy(proc->tname, open_paren + 1, THREAD_NAME_LEN); 339 proc->tname[THREAD_NAME_LEN-1] = 0; 340 341 /* Scan rest of string. */ 342 sscanf(close_paren + 1, " %c %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d " 343 "%lu %lu %*d %*d %*d %*d %*d %*d %*d %lu %ld", 344 &proc->state, &proc->utime, &proc->stime, &proc->vss, &proc->rss); 345 346 return 0; 347 } 348 349 static void add_proc(int proc_num, struct proc_info *proc) { 350 int i; 351 352 if (proc_num >= num_new_procs) { 353 new_procs = realloc(new_procs, 2 * num_new_procs * sizeof(struct proc_info *)); 354 if (!new_procs) die("Could not expand procs array.\n"); 355 for (i = num_new_procs; i < 2 * num_new_procs; i++) 356 new_procs[i] = NULL; 357 num_new_procs = 2 * num_new_procs; 358 } 359 new_procs[proc_num] = proc; 360 } 361 362 static int read_cmdline(char *filename, struct proc_info *proc) { 363 FILE *file; 364 char line[MAX_LINE]; 365 366 line[0] = '\0'; 367 file = fopen(filename, "r"); 368 if (!file) return 1; 369 fgets(line, MAX_LINE, file); 370 fclose(file); 371 if (strlen(line) > 0) { 372 strncpy(proc->name, line, PROC_NAME_LEN); 373 proc->name[PROC_NAME_LEN-1] = 0; 374 } else 375 proc->name[0] = 0; 376 return 0; 377 } 378 379 static void read_policy(int pid, struct proc_info *proc) { 380 SchedPolicy p; 381 if (get_sched_policy(pid, &p) < 0) 382 strcpy(proc->policy, "unk"); 383 else { 384 if (p == SP_BACKGROUND) 385 strcpy(proc->policy, "bg"); 386 else if (p == SP_FOREGROUND) 387 strcpy(proc->policy, "fg"); 388 else 389 strcpy(proc->policy, "er"); 390 } 391 } 392 393 static int read_status(char *filename, struct proc_info *proc) { 394 FILE *file; 395 char line[MAX_LINE]; 396 unsigned int uid, gid; 397 398 file = fopen(filename, "r"); 399 if (!file) return 1; 400 while (fgets(line, MAX_LINE, file)) { 401 sscanf(line, "Uid: %u", &uid); 402 sscanf(line, "Gid: %u", &gid); 403 } 404 fclose(file); 405 proc->uid = uid; proc->gid = gid; 406 return 0; 407 } 408 409 static void print_procs(void) { 410 int i; 411 struct proc_info *old_proc, *proc; 412 long unsigned total_delta_time; 413 struct passwd *user; 414 struct group *group; 415 char *user_str, user_buf[20]; 416 char *group_str, group_buf[20]; 417 418 for (i = 0; i < num_new_procs; i++) { 419 if (new_procs[i]) { 420 old_proc = find_old_proc(new_procs[i]->pid, new_procs[i]->tid); 421 if (old_proc) { 422 new_procs[i]->delta_utime = new_procs[i]->utime - old_proc->utime; 423 new_procs[i]->delta_stime = new_procs[i]->stime - old_proc->stime; 424 } else { 425 new_procs[i]->delta_utime = 0; 426 new_procs[i]->delta_stime = 0; 427 } 428 new_procs[i]->delta_time = new_procs[i]->delta_utime + new_procs[i]->delta_stime; 429 } 430 } 431 432 total_delta_time = (new_cpu.utime + new_cpu.ntime + new_cpu.stime + new_cpu.itime 433 + new_cpu.iowtime + new_cpu.irqtime + new_cpu.sirqtime) 434 - (old_cpu.utime + old_cpu.ntime + old_cpu.stime + old_cpu.itime 435 + old_cpu.iowtime + old_cpu.irqtime + old_cpu.sirqtime); 436 437 qsort(new_procs, num_new_procs, sizeof(struct proc_info *), proc_cmp); 438 439 printf("\n\n\n"); 440 printf("User %ld%%, System %ld%%, IOW %ld%%, IRQ %ld%%\n", 441 ((new_cpu.utime + new_cpu.ntime) - (old_cpu.utime + old_cpu.ntime)) * 100 / total_delta_time, 442 ((new_cpu.stime ) - (old_cpu.stime)) * 100 / total_delta_time, 443 ((new_cpu.iowtime) - (old_cpu.iowtime)) * 100 / total_delta_time, 444 ((new_cpu.irqtime + new_cpu.sirqtime) 445 - (old_cpu.irqtime + old_cpu.sirqtime)) * 100 / total_delta_time); 446 printf("User %ld + Nice %ld + Sys %ld + Idle %ld + IOW %ld + IRQ %ld + SIRQ %ld = %ld\n", 447 new_cpu.utime - old_cpu.utime, 448 new_cpu.ntime - old_cpu.ntime, 449 new_cpu.stime - old_cpu.stime, 450 new_cpu.itime - old_cpu.itime, 451 new_cpu.iowtime - old_cpu.iowtime, 452 new_cpu.irqtime - old_cpu.irqtime, 453 new_cpu.sirqtime - old_cpu.sirqtime, 454 total_delta_time); 455 printf("\n"); 456 if (!threads) 457 printf("%5s %4s %1s %5s %7s %7s %3s %-8s %s\n", "PID", "CPU%", "S", "#THR", "VSS", "RSS", "PCY", "UID", "Name"); 458 else 459 printf("%5s %5s %4s %1s %7s %7s %3s %-8s %-15s %s\n", "PID", "TID", "CPU%", "S", "VSS", "RSS", "PCY", "UID", "Thread", "Proc"); 460 461 for (i = 0; i < num_new_procs; i++) { 462 proc = new_procs[i]; 463 464 if (!proc || (max_procs && (i >= max_procs))) 465 break; 466 user = getpwuid(proc->uid); 467 group = getgrgid(proc->gid); 468 if (user && user->pw_name) { 469 user_str = user->pw_name; 470 } else { 471 snprintf(user_buf, 20, "%d", proc->uid); 472 user_str = user_buf; 473 } 474 if (group && group->gr_name) { 475 group_str = group->gr_name; 476 } else { 477 snprintf(group_buf, 20, "%d", proc->gid); 478 group_str = group_buf; 479 } 480 if (!threads) 481 printf("%5d %3ld%% %c %5d %6ldK %6ldK %3s %-8.8s %s\n", proc->pid, proc->delta_time * 100 / total_delta_time, proc->state, proc->num_threads, 482 proc->vss / 1024, proc->rss * getpagesize() / 1024, proc->policy, user_str, proc->name[0] != 0 ? proc->name : proc->tname); 483 else 484 printf("%5d %5d %3ld%% %c %6ldK %6ldK %3s %-8.8s %-15s %s\n", proc->pid, proc->tid, proc->delta_time * 100 / total_delta_time, proc->state, 485 proc->vss / 1024, proc->rss * getpagesize() / 1024, proc->policy, user_str, proc->tname, proc->name); 486 } 487 } 488 489 static struct proc_info *find_old_proc(pid_t pid, pid_t tid) { 490 int i; 491 492 for (i = 0; i < num_old_procs; i++) 493 if (old_procs[i] && (old_procs[i]->pid == pid) && (old_procs[i]->tid == tid)) 494 return old_procs[i]; 495 496 return NULL; 497 } 498 499 static void free_old_procs(void) { 500 int i; 501 502 for (i = 0; i < num_old_procs; i++) 503 if (old_procs[i]) 504 free_proc(old_procs[i]); 505 506 free(old_procs); 507 } 508 509 static int proc_cpu_cmp(const void *a, const void *b) { 510 struct proc_info *pa, *pb; 511 512 pa = *((struct proc_info **)a); pb = *((struct proc_info **)b); 513 514 if (!pa && !pb) return 0; 515 if (!pa) return 1; 516 if (!pb) return -1; 517 518 return -numcmp(pa->delta_time, pb->delta_time); 519 } 520 521 static int proc_vss_cmp(const void *a, const void *b) { 522 struct proc_info *pa, *pb; 523 524 pa = *((struct proc_info **)a); pb = *((struct proc_info **)b); 525 526 if (!pa && !pb) return 0; 527 if (!pa) return 1; 528 if (!pb) return -1; 529 530 return -numcmp(pa->vss, pb->vss); 531 } 532 533 static int proc_rss_cmp(const void *a, const void *b) { 534 struct proc_info *pa, *pb; 535 536 pa = *((struct proc_info **)a); pb = *((struct proc_info **)b); 537 538 if (!pa && !pb) return 0; 539 if (!pa) return 1; 540 if (!pb) return -1; 541 542 return -numcmp(pa->rss, pb->rss); 543 } 544 545 static int proc_thr_cmp(const void *a, const void *b) { 546 struct proc_info *pa, *pb; 547 548 pa = *((struct proc_info **)a); pb = *((struct proc_info **)b); 549 550 if (!pa && !pb) return 0; 551 if (!pa) return 1; 552 if (!pb) return -1; 553 554 return -numcmp(pa->num_threads, pb->num_threads); 555 } 556 557 static int numcmp(long long a, long long b) { 558 if (a < b) return -1; 559 if (a > b) return 1; 560 return 0; 561 } 562 563 static void usage(char *cmd) { 564 fprintf(stderr, "Usage: %s [ -m max_procs ] [ -n iterations ] [ -d delay ] [ -s sort_column ] [ -t ] [ -h ]\n" 565 " -m num Maximum number of processes to display.\n" 566 " -n num Updates to show before exiting.\n" 567 " -d num Seconds to wait between updates.\n" 568 " -s col Column to sort by (cpu,vss,rss,thr).\n" 569 " -t Show threads instead of processes.\n" 570 " -h Display this help screen.\n", 571 cmd); 572 } 573
